I'm wondering whether there's a way to test the internal NAND speed, then we can compare and balance whether to use extend SD card.
I have a Sandisk Class4 !6G microsd which has 19M/16M read and write, but if the NAND still much faster than this card, im considering to use internal storage only(less mp3 and game instead), its hard to balance.
Sorry to re-awaken an old thread, but since you've had no reply: I had the same question, and found an app in the Market called "Android Hacker's System Tool" that includes a storage speed test (among many other things).
On my Motorola Droid1 running MIUI (not o/c'ed currently), I was shocked to see NAND speeds of only 1.9 MB/s read and 0.21 MB/s write. The OEM 16gb SD card showed a bit over 2 MB/s for both read and write... at least symmetrical, but still very slow. No wonder apps on the SD card seem just as quick as those in NAND!
Any thoughts as to why IO is this poor overall, and why NAND write in particular is so pathetic? The phone feels very smooth right now.
Why do you post questions about your Droid in a Windows Phone forum? Samsung Focus is Windows Phone 7. There is nothing in common with your Droid.
rvonder, interest numbers, thanks for the post. I'm a little surprised at the low numbers as well. Especially the writes. Hopefully we will have a test app for WP7 soon.
Just going by deduction from here. If the phone feels snappy even with those numbers, isn't it safe to assume it doesn't matter ?
rvonder said:
Sorry to re-awaken an old thread, but since you've had no reply: I had the same question, and found an app in the Market called "Android Hacker's System Tool" that includes a storage speed test (among many other things).
On my Motorola Droid1 running MIUI (not o/c'ed currently), I was shocked to see NAND speeds of only 1.9 MB/s read and 0.21 MB/s write. The OEM 16gb SD card showed a bit over 2 MB/s for both read and write... at least symmetrical, but still very slow. No wonder apps on the SD card seem just as quick as those in NAND!
Any thoughts as to why IO is this poor overall, and why NAND write in particular is so pathetic? The phone feels very smooth right now.
Click to expand...
Click to collapse
foxbat121 said:
Why do you post questions about your Droid in a Windows Phone forum? Samsung Focus is Windows Phone 7. There is nothing in common with your Droid.
Click to expand...
Click to collapse
rather than waste anybody's time, please read the question first next time, it has nothing to do specificaly with android but rather about the use of external memory card considering the Focus uses built-in NAND memory that might be much faster than the external memory (or not). Since Windows 7 phone "merges" both memory, it would most likely be at the speed of the slowes of both...
thegarmac said:
rather than waste anybody's time, please read the question first next time, it has nothing to do specificaly with android but rather about the use of external memory card considering the Focus uses built-in NAND memory that might be much faster than the external memory (or not). Since Windows 7 phone "merges" both memory, it would most likely be at the speed of the slowes of both...
Click to expand...
Click to collapse
Did you read his question? He was asking why his Droid phone SD card IO is so slow. First of all the Android app in question does something really stupid. Last time I checked, it gives out really low IO score on my Captivate as well. So, I'd say it is the app that's not really designed well, or could be Android OS doesn't offer a good API for testing the SD performance. None of these are related to how WP7 works. As you mentioned above, WP7 treats memory differently and no one knows exactly how SD performance affects entire system (we knew that most 'faster' SD cards don't work). And we don't have any app to test native IO speeds of the combined memory. So, this is really comparing apples to oranges.
Related
Hi all,
I'm going to finally have some spare time this weekend and might even get to have a mess around with Android on my HD2 if I get lucky! My concern is that I have a 16GB Class2 microSD in my Leo and while looking at HD2 stuff on ebay came across this.
The seller states that Android won't run (properly?) on his 16gb Class2 and includes a Class6 8gb card aswell for this purpose.
What's everyone's experience with running Android on a slower card? From looking around I've seen people saying 'there isn't much difference' for most things but a lot of contridictions for others.
Thanks gang!
I have no issues with my Android build currently, and it's on a 4gb Class 2 SD card.
It does help having a faster one, but It's not the end of the world.
Phil
Have been testing out froyostone sense build on a 2gb class 2 card and it's like lightening So yes, would format first though otherwise you will get lag.
Cheers - yep I won't forget to format, been reading the threads while working this week... taken in loads of info, just need to find the time to actually get it rolling
I was wondering the same thing. I installed froyostone 08.07.2010 using miri Rom on stock radio on a friends hd2 and it freezes and comes back to life very often. Would a higher class sdcard solve his problem?
I think they guy on eBay is talking rubbish. I run darkstone's 2.2 perfectly well on a 16GB Class 2. A Class 4 would probably help a little bit, but I'm not that fussed really.
I'd be more concerned about getting dodgy copies of Transformers from them!!
murdaralph said:
I was wondering the same thing. I installed froyostone 08.07.2010 using miri Rom on stock radio on a friends hd2 and it freezes and comes back to life very often. Would a higher class sdcard solve his problem?
Click to expand...
Click to collapse
The whole OS and all animations etc, or just touch screen response?
If its the touch screen, that's a known issue and will be addressed in due course.
Phil
It's in german, but i guess u may figure it out.
h**p://***.chip.de/bestenlisten/Bestenliste-microSD-Karten--index/detail/id/867/
I have a kingston class 2 , not working.
qingcai said:
I have a kingston class 2 , not working.
Click to expand...
Click to collapse
A Little more information would be useful, what's not working about it? How's it formatted? Has it even been formatted and then had a new build copied to it?
Phil
i never had issues with a class 2 before... no SOD or anything... although after switching to class 4, there is noticeable speed. now in class 10, a lot faster. but no real issues in class 2 except a tad slower (but decent speed nonetheless)
I use the 16gb class 2 card and its quick with decent quadrant tests. I think its because android loads into ram (please correct me if I am wrong, ill search for this later). I think there are apps that read or write to folders on the SD card that would gain from speed of a class 6 or 10 card and if I am right about loading to ram the boot up time could receive a benefit.
Personally I am looking to get one just to access media faster and for taking pics and vids as there is a write delay that's typical with all phones. If it helps android in its current state the cool but I'm not in a rush. Development here have made great strides in making android snappy and android is an awesome is as it is for handling background tasks. Much to the credit of Linux but I find android to be a faster evolution then most mobile oses. Much to the credit of being open source and encourage community development. Nothing here is illegal but maybe some grey areas in closed source distributing which cyanogen had an interesting situation that was resolved quickly with Google's assistance.
But I am off topic now. Yes it would help with some things but don't break the piggy bank over it.
Hope my thoughts are helpful. It would be better to get feedback from those that have done it and get before and after boot, quad, and market download responsiveness tests. I may have a class 6 8gb card somewhere I can test later tonight. I would do fresh sdformatter formats with nothing but android on the card to get a somewhat standard benchmark.
Sent from my HTC HD2 using XDA App
Mine is 16gb class 2, with the latest fullram zimage, i score 29.2fps in neocore test
and can play sparta! very smooth, also the asphalt 5
kerman19 said:
The whole OS and all animations etc, or just touch screen response?
If its the touch screen, that's a known issue and will be addressed in due course.
Phil
Click to expand...
Click to collapse
the touch screen. The SD card was quick formatted. Would that make a difference in the builds performance ?
I'm using a Kingston class 2, but it performs with 5,5MBs writing speed when used in a computer slot, so in practice its a class 5,5. Works great! Froyostone sense v1
pappadj said:
I use the 16gb class 2 card and its quick with decent quadrant tests. I think its because android loads into ram (please correct me if I am wrong, ill search for this later). I think there are apps that read or write to folders on the SD card that would gain from speed of a class 6 or 10 card and if I am right about loading to ram the boot up time could receive a benefit.
Personally I am looking to get one just to access media faster and for taking pics and vids as there is a write delay that's typical with all phones. If it helps android in its current state the cool but I'm not in a rush. Development here have made great strides in making android snappy and android is an awesome is as it is for handling background tasks. Much to the credit of Linux but I find android to be a faster evolution then most mobile oses. Much to the credit of being open source and encourage community development. Nothing here is illegal but maybe some grey areas in closed source distributing which cyanogen had an interesting situation that was resolved quickly with Google's assistance.
But I am off topic now. Yes it would help with some things but don't break the piggy bank over it.
Hope my thoughts are helpful. It would be better to get feedback from those that have done it and get before and after boot, quad, and market download responsiveness tests. I may have a class 6 8gb card somewhere I can test later tonight. I would do fresh sdformatter formats with nothing but android on the card to get a somewhat standard benchmark.
Sent from my HTC HD2 using XDA App
Click to expand...
Click to collapse
You have experience with your G1, the class 6 I use on mine makes definite difference when running apps from your sd card. I've been alternating using my 16 GB Class 2 and my 8 GB Class 6 in my HD2 but I haven't seen any speed difference with android so I believe that it runs on the internal ram.
i think class 2 is enough
murdaralph said:
the touch screen. The SD card was quick formatted. Would that make a difference in the builds performance ?
Click to expand...
Click to collapse
Touch Screen lag/freezing is a known issue right now and doesn't relate to the SD card.
It's being worked on.
Phil
I have a class 2 16GB sandisk drive and score 1578 in quadrant standard, that said i usually get write speeds of around 6MB/sec on my computer
i personally think it helps a bit ( i ws previously running Android off the 16GB class 2 card the HD2 came with) but experienced some lag when scrolling.
That said, it was an early build of Android so it was probably just that.
The thing is, 8GB class6 cards are relatively cheap to buy (i picked up an A-DATA 8GB class 6 for $21 canadian at CanadaComputers)
so..why not upgrade to the class6 card? I'm sure it wouldn't hurt and no matter what you'll experience at least have SOME sort of performance gain in other aspects (music, pictures, file managers, etc)
I ordered a ADATA 8GB MicroSDHC Class 10 memory card for my HTC HD2. I'd like to know if it will work well on my phone since the transfer is so high. I'm asking this because I want to use a SD version on android.
Thank you in advance for the answer!
When i asked my friend who was the Sales Director of Sandisk Australiasia, he said that the read and write speeds of the supplied Class 2 was more than enough, since these Class 2 is the minimum guaranteed write speeds for that card.
Personally, i'd like to use a faster card, but i think that the key here is the quality of the card over the speed. Im using android over SD and dont mind the negligible lag.
Perhaps someone who has tried a faster card can comment on Droid on SD, as NAND speed offers the fastest, but without the flexibility.
GLO said:
When i asked my friend who was the Sales Director of Sandisk Australiasia, he said that the read and write speeds of the supplied Class 2 was more than enough, since these Class 2 is the minimum guaranteed write speeds for that card.
Personally, i'd like to use a faster card, but i think that the key here is the quality of the card over the speed. Im using android over SD and dont mind the negligible lag.
Perhaps someone who has tried a faster card can comment on Droid on SD, as NAND speed offers the fastest, but without the flexibility.
Click to expand...
Click to collapse
I found a really old thread where people were saying it is fully supported. Thanks for the answer! I want to use android on the sd too because I don't really want to risk messing up my phone with a rom install.
It's been around for ages that the speed of the SD doesn't matter for SD android.
what matters is the access time, here's a thread for benchmarks:
http://forum.xda-developers.com/showthread.php?t=1048649
the smaller the access time the better. in other words, you might get a class 10 card with long access time, and a class 2 with short access time, the class 2 will perform better overall (faster system loading, etc). but when you copy large files the class 10 will be faster.
meaning: for running android on SD you need a faster access time, and each millisecond counts.
[edit] forgot to say that random read and write speeds play a good role as well.
I use PNY 32GB class 10 MicroSD card in my HD2. No problem at all. Phone is only one week old and haven't installed any cooked ROM yet so 32GB card on stock ROM.
yes, a class 10 would work perfect with stock or custom windows ROMs. and with NAND android to some point.
I'm talking about SD android which, in case you haven't read the previous posts, he wants to run a build on his SD. and that's where the class 10 cards start to look bad. they mostly have slower random read/write speeds. In usage terms that's: lags, lags, errors, and more lags.
Hello,
currently, im running a class 6 micro sd card in my hd2. Now, if i replace the card with a class 10, is there a boost i would 'feel'? Or is there no real difference in performance, only on paper?
Normally, no. You'll feel difference only when copying very big files over long time(say large movie over card reader as HD2 hardware bandwith is also limited). For normal, everyday use SD 4 or 6 class is the best choice.
retsam88 said:
Normally, no. You'll feel difference only when copying very big files over long time(say large movie over card reader as HD2 hardware bandwith is also limited). For normal, everyday use SD 4 or 6 class is the best choice.
Click to expand...
Click to collapse
I'm using a 32GB Class 4 SanDisk (partitioned into two 16GB chunks) for my WP7.5 and Android. SD Android builds do tend to seem laggy at times.... is this expected?
abdelazeez said:
I'm using a 32GB Class 4 SanDisk (partitioned into two 16GB chunks) for my WP7.5 and Android. SD Android builds do tend to seem laggy at times.... is this expected?
Click to expand...
Click to collapse
Yes. Some SD builds are faster than others, though NAND Android is always superior to SD builds.
Also keep in mind overall Android speed is determined by random access, not sequential(micro SD class!) write/read.
in my experience, the class label placed by the manufacturer is misleading.
the class rating doesn't really talk about maximum speed. instead, it talks about the minimum guaranteed speed. it is best to read benchmarks before you go for a particular sd card.
for example, i used an 8GB sandisk class 2. this means that the card can at least demonstrate class 2 performance. in practice, it was FAST!!! gave about 10+MB read speed and about 7+MB write speed.
then i got a 32GB kingston class 4. this means that the card can at least demonstrate class 4 performance. in practice, it was slower than my previous 8GB sandisk. got about 10+MB read speed and about 3+MB write speed.
so, in conclusion, no one can reliably tell you if a particular card model will feel faster. like others have mentioned, there are already complications like differences in nand and sd and even differences between two seemingly similar nand builds, for example. when we talk about comparisons and observations that YOU will perceive as a result of your purchase, we are really talking about what improvements (or lack of) you will feel in comparison to your existing card. and all we can tell about your existing card or the one you intend to get is the misleading class label on the card.
sd nand
Thx for the info guys!
NAND Android is always superior to SD builds
Click to expand...
Click to collapse
Which leads me to another question...
Does anybody know numbers about the performance differences between SD and NAND builds? SD builds differ in speed, retsam88 already said that, but are there some rough numbers?
Are there devices which are known for fast/slow NANDs (or other significant characteristics)? Or are the NANDs identical in every device? Maybe a link?
Sorry for asking stupid questions but I'm pretty new to the customROM-stuff and also want to get some technical background knowledge before diving in in october with the studies .... again, thanks in advance!
Since I had my HD2 like months ago I was always using SD-Roms cause their easy to use via MagLdr & I thought the speed was OK but as you go on using it it becomes laggy...
then I tried an AOKP NAND & there was a significant difference in speed, so now i'm stuck in using NAND Roms., BTW my SD card was a Class 10 type :silly:
moson said:
Thx for the info guys!
Which leads me to another question...
Does anybody know numbers about the performance differences between SD and NAND builds? SD builds differ in speed, retsam88 already said that, but are there some rough numbers?
Are there devices which are known for fast/slow NANDs (or other significant characteristics)? Or are the NANDs identical in every device? Maybe a link?
Sorry for asking stupid questions but I'm pretty new to the customROM-stuff and also want to get some technical background knowledge before diving in in october with the studies .... again, thanks in advance!
Click to expand...
Click to collapse
Those are very interesting questions must say
As for differences, I'll give you my personal observations:
-Booting up system is both fast on SD and NAND builds.
-Stability is superior on NAND(because SD can corrupt badly if used incorrectly)
-Installing apps is way faster on NAND(say, 15-60sec improvement)
-NAND got limited write/read cycles(a lot though) so SD builds keeps HD2 healthy longer.
-games running on NAND android seems to be bit faster(depends, sometimes 1-3FPS more, sometimes hell of a lot 20FPS+)
As for NAND speeds, HD2 was manufactured by mass scale, so NAND speeds seems to be relative similar with every device. With microSD you got many manufacturers, big companies, small companies, fake companies so results differ a lot. Also SD cards tend to get replaced faster.
Also feel free to ask further questions.
more questions
Cool! Thanks again for sharing your knowledge
retsam88 said:
As for NAND speeds, HD2 was manufactured by mass scale, so NAND speeds seems to be relative similar with every device.
Click to expand...
Click to collapse
I meant the speed differences between a HD2 and a Desire for example, or HTC and Samsung in general.
NAND got limited write/read cycles(a lot though) so SD builds keeps HD2 healthy longer.
Click to expand...
Click to collapse
SD cards also have limited cycles, don't they?
Also feel free to ask further questions.
Click to expand...
Click to collapse
awww yeeeah, prepare
I hope it's ok, also with an eye on the moderators, coz the thread title is pretty misleading now
Is there a way to replace the NAND?
If so, how much does it cost and can you replace it yourself?
Are there some smartphones/tablets without NANDs?
Which phones are known for having big/small internal storage space?
Which one is more resistant against magnetic influences: NAND or SD?
Beside microSD, are there any more relevant card types used in mobile devices?
If you look towards future, any changes (especially hardware) coming soon? like card type changes, notably increased NAND speed/storage space/
A lot of questions I know, just curious, if you guys know answers, don't hesitate to post ))
and thanks again!
moson said:
Is there a way to replace the NAND?
If so, how much does it cost and can you replace it yourself?
Click to expand...
Click to collapse
Technically it's possible but very hard and time consuming.
moson said:
Which phones are known for having big/small internal storage space?
Click to expand...
Click to collapse
Older phones tend to have small user space, for example HTC Canary got 24MB ROM lol
moson said:
Are there some smartphones/tablets without NANDs?
Click to expand...
Click to collapse
Probably, no. Every phone needs some sort of operating system residing in NAND
moson said:
Which phones are known for having big/small internal storage space?
Click to expand...
Click to collapse
Look for HTC One X series.
moson said:
Which one is more resistant against magnetic influences: NAND or SD?
Click to expand...
Click to collapse
Actually NAND is a way of storing information, both internal HD2 memory and SD cards are built with NAND. We just call HD2 internal memory in short- NAND. NAND is very resistant.
moson said:
Beside microSD, are there any more relevant card types used in mobile devices?
Click to expand...
Click to collapse
Not much other than microSD, though I saw some smartphones using compact flash mem.
moson said:
If you look towards future, any changes (especially hardware) coming soon? like card type changes, notably increased NAND speed/storage space/
Click to expand...
Click to collapse
Yes, in short, SSD tech in smartphones.
i have bought a new Sandisk Ultra 16GB class 10 card and flash nexushd2 rom in native sd but i notice no different than nand in the speed !!!
i test the card with h2testw_1.4 and it was ok the speed was 10mb R/W,
So Where is the Speed that everyone talk about !!!!
x_max_best said:
i have bought a new Sandisk Ultra 16GB class 10 card and flash nexushd2 rom in native sd but i notice no different than nand in the speed !!!
i test the card with h2testw_1.4 and it was ok the speed was 10mb R/W,
So Where is the Speed that everyone talk about !!!!
Click to expand...
Click to collapse
That's basically because it's a myth .
I'm kidding, I don't know if it is or not, but personally, I didn't notice any speed difference or improvement. I tried different ROMs, they all behaved as if they were on NAND. I have the same card as you do.
Someone told me once: "It's because you have a UHS card, HD2 doesn't support them so the speed is degraded".
I am not sure of that, but there was no apparent improvement over NAND installation.
+1, I never saw any speed difference. My guess is that since it would theoretically be faster there was a placebo effect and people actually felt their phones being faster. The same thing happens with build.prop tweaks and the entropy seed generator, both of which had great comments but no actual effect on my phone.
x_max_best said:
i have bought a new Sandisk Ultra 16GB class 10 card and flash nexushd2 rom in native sd but i notice no different than nand in the speed !!!
i test the card with h2testw_1.4 and it was ok the speed was 10mb R/W,
So Where is the Speed that everyone talk about !!!!
Click to expand...
Click to collapse
You should read first my friend,this way you will save some Money,any Sandisk class 4 will be faster than any class 10 in native sd, simply because with a class 10 card you get high sequential data transfer and very low random data transfer, and that is the secret random access transfer rate.
But the manufacturers won't tell you the random access speeds, you have to test.
Use crystal disk mark to test the sd and check for the last 2 values..
And read..and search..
Sent from my GT-I9300 using xda premium
x_max_best said:
i have bought a new Sandisk Ultra 16GB class 10 card and flash nexushd2 rom in native sd but i notice no different than nand in the speed !!!
i test the card with h2testw_1.4 and it was ok the speed was 10mb R/W,
So Where is the Speed that everyone talk about !!!!
Click to expand...
Click to collapse
I can confirm that the problem is with the Sandisk Ultra SD Card. I had good read but very poor write speeds on a Sandisk UHC which caused all sorts of problems. I changed to a Samsung Class 10 32Gb card and the difference is very noticeable The Sandisk gave a write speed of about 3/4 Mbs and a read speed of about 15 Mbs. The Samsung now gives a write speed of 9.7 and a read speed of 20.15. Both tested with a cache size of 2048Kb.
sandymac said:
I can confirm that the problem is with the Sandisk Ultra SD Card. I had good read but very poor write speeds on a Sandisk UHC which caused all sorts of problems. I changed to a Samsung Class 10 32Gb card and the difference is very noticeable The Sandisk gave a write speed of about 3/4 Mbs and a read speed of about 15 Mbs. The Samsung now gives a write speed of 9.7 and a read speed of 20.15. Both tested with a cache size of 2048Kb.
Click to expand...
Click to collapse
I had the same low write speed in native SD (3 mb), but i flash the rom again in DataonExt mod and the speed of write was 7 mb and i feel some speed up in apps (not in the rom) Rom toolbox collect data faster , I think there is something wroung with Native SD ,the speed of write should be higher than 3mb
Edit: it was a placebo effect , there is no speed up in DataonExt , i test the same app in Nand
x_max_best said:
I had the same low write speed in native SD (3 mb), but i flash the rom again in DataonExt mod and the speed of write was 7 mb and i feel some speed up in apps (not in the rom) Rom toolbox collect data faster , I think there is something wroung with Native SD ,the speed of write should be higher than 3mb
Click to expand...
Click to collapse
Well, if you looked, I am on Native SD and generally manage around the 10Mbs write with 20Mbs read so nothing wrong with Native SD.
as the creators of nativeSD and others have pointed out, it's all down to the small block size random read/write speed, that's what most read/writes are when running an OS, small and random.
While reading (for example) a video, it will read bigger, almost certainly sequential, block sizes.
The industry quoted max speed of a card is almost always based on the largest block size, usually read, always sequential speed, so a class 10 can read large block sizes at 10meg, however, test the card for all different block sizes and you'll see that small random r/w's are wayyyyy slower, massively so, often on the order of a factor of 1000 slower.
In general, the lower class cards actually beat the class 10s, often by a large factor, so the rom running from it feels snappier and more responsive than on a class 10.
Check out the (admittedly over a year old, but still a good example) comparison charts HERE, and note especially the 4th and 5th charts, where the class 4 blows the others down by over a factor of 100
http://www.tomshardware.com/reviews/microsdhc-memory-card-performance,3011-12.html
samsamuel said:
as the creators of nativeSD and others have pointed out, it's all down to the small block size random read/write speed, that's what most read/writes are when running an OS, small and random.
While reading (for example) a video, it will read bigger, almost certainly sequential, block sizes.
The industry quoted max speed of a card is almost always based on the largest block size, usually read, always sequential speed, so a class 10 can read large block sizes at 10meg, however, test the card for all different block sizes and you'll see that small random r/w's are wayyyyy slower, massively so, often on the order of a factor of 1000 slower.
In general, the lower class cards actually beat the class 10s, often by a large factor, so the rom running from it feels snappier and more responsive than on a class 10.
Check out the (admittedly over a year old, but still a good example) comparison charts HERE, and note especially the 4th and 5th charts, where the class 4 blows the others down by over a factor of 100
http://www.tomshardware.com/reviews/microsdhc-memory-card-performance,3011-12.html
Click to expand...
Click to collapse
yugoport said:
You should read first my friend,this way you will save some Money,any Sandisk class 4 will be faster than any class 10 in native sd, simply because with a class 10 card you get high sequential data transfer and very low random data transfer, and that is the secret random access transfer rate.
But the manufacturers won't tell you the random access speeds, you have to test.
Use crystal disk mark to test the sd and check for the last 2 values..
And read..and search..
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
This is crystal disk mark for my SD Card , See it and tell me where exactly the problem !!
x_max_best said:
This is crystal disk mark for my SD Card , See it and tell me where exactly the problem !!
Click to expand...
Click to collapse
Look at my scandisk class 2 32 gb below, in the last field at right is basically more than 30 times faster than yours in the random write..
https://www.dropbox.com/s/bgbm6tcv99a1r7j/scandisk class 2 32 gb.JPG
This is crystal disk mark for my SD Card , See it and tell me where exactly the problem !!
Click to expand...
Click to collapse
The random write speed is to low! Look by "write 4k" and "write 4k/QD32".
Look here, the second ranking is importand for us:
http://forums.whirlpool.net.au/forum-replies.cfm?t=1582172
And here from XDA:
http://forum.xda-developers.com/showthread.php?t=1150369
x_max_best said:
This is crystal disk mark for my SD Card , See it and tell me where exactly the problem !!
Click to expand...
Click to collapse
as already noted 4k and 4kqd32 (qd32 = there are 32 or more write operations in the queue, probably quite common when running an operating system) speeds are atrocious, thats gonna be your real speed, more often than not, somewhere between 38K/sec and 0.6MB/sec,,, a world away from 10MB/sec. Course, oftentimes the system is reading those small blocks, not writing, which is faster so you can probably make a rough estimate of total average r/w at around 2MB/sec, still a long way from 10MB/sec
yugoport said:
Look at my scandisk class 2 32 gb below, in the last field at right is basically more than 30 times faster than yours in the random write..
https://www.dropbox.com/s/bgbm6tcv99a1r7j/scandisk class 2 32 gb.JPG
Click to expand...
Click to collapse
Fietz said:
The random write speed is to low! Look by "write 4k" and "write 4k/QD32".
Look here, the second ranking is importand for us:
http://forums.whirlpool.net.au/forum-replies.cfm?t=1582172
And here from XDA:
http://forum.xda-developers.com/showthread.php?t=1150369
Click to expand...
Click to collapse
Your Conclusion is wroung , i retest my card with CrystalDiskMark and the result was interesting (attachment) ,and all i did to get this result is change the test size to 50 mb , i start to believe that there is noting called fast Native SD , it is just placebo effect.
if you want me to believe u ,provide a video in Youtube for the fast Native SD that u have and let me know what do u mean by fast Native SD
x_max_best said:
Your Conclusion is wroung , i retest my card with CrystalDiskMark and the result was interesting (attachment) ,and all i did to get this result is change the test size to 50 mb , i start to believe that there is noting called fast Native SD , it is just placebo effect.
if you want me to believe u ,provide a video in Youtube for the fast Native SD that u have and let me know what do u mean by fast Native SD
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I don't need to prove anything..if you think it's not fast or it doesn't suits you use nand.. I have more important things to do..
Sent from my GT-I9300 using xda premium
Hi, I'm currently thinking about popping an SDcard in my xplay and was wondering how fast the slot runs at?
I was thinking maybe I will be wasting my money getting the fastest card on the block if the slot speed is slower than the SD card.
Also am curious in the difference in speed of the internal memory compared to the fastest speed of the sd card.
If anyone has any info on the above would be grateful for your input.
rockyrobin said:
Hi, I'm currently thinking about popping an SDcard in my xplay and was wondering how fast the slot runs at?
I was thinking maybe I will be wasting my money getting the fastest card on the block if the slot speed is slower than the SD card.
Also am curious in the difference in speed of the internal memory compared to the fastest speed of the sd card.
If anyone has any info on the above would be grateful for your input.
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Click to collapse
I've just borrowed an SDcard out of another phone (Samsung evo (yellow)) and benchmarked against the internal SD card and got the following scores:
External - (read) 34.36MB/s, (write) 20.0MB/s
Internal - (read) 89.76MB/s, (write) 53.35MB/s
Has anyone found an SDcard that is as fast as the internal?
rockyrobin said:
I've just borrowed an SDcard out of another phone (Samsung evo (yellow)) and benchmarked against the internal SD card and got the following scores:
External - (read) 34.36MB/s, (write) 20.0MB/s
Internal - (read) 89.76MB/s, (write) 53.35MB/s
Has anyone found an SDcard that is as fast as the internal?
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I don't think there are sdcards available with the same read/write speeds as internal. On my old moto g with LP ROM I always installed big games to my sdcard using apps2sd and the only difference i noticed was that it takes a little longer loading an app.
Sickaxis79 said:
I don't think there are sdcards available with the same read/write speeds as internal. On my old moto g with LP ROM I always installed big games to my sdcard using apps2sd and the only difference i noticed was that it takes a little longer loading an app.
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I was just looking at the benchmark results database for the "a1 SD benchmark" app and there are a few submissions that encourage me to think it may be possible with a card like the Samsung Pro series which can do around 80r/70w MB/s. Only thing that has me wondering is whether the card interface would be a bottleneck?
rockyrobin said:
I was just looking at the benchmark results database for the "a1 SD benchmark" app and there are a few submissions that encourage me to think it may be possible with a card like the Samsung Pro series which can do around 80r/70w MB/s. Only thing that has me wondering is whether the card interface would be a bottleneck?
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It also depends on the phone I guess as to how much speeds it can reach.
Automated reply by JARVIS
Just Popped a Samsung Pro card in which is rated as 90/80 and an only seeing 54/21 so am assuming the sdcard interface is neutered in some way compared to some other higher end phones.
Anyone else noticing this performance ceiling?
rockyrobin said:
Just Popped a Samsung Pro card in which is rated as 90/80 and an only seeing 54/21 so am assuming the sdcard interface is neutered in some way compared to some other higher end phones.
Anyone else noticing this performance ceiling?
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Not neutered - All SD card interfaces are slower than the actual memory built in to the phone, this is right across the board for all phones. It's a known bottle neck that's a fact of life. That is the biggest thing in favour of more memory in the actual phone. I'm not a gamer but I have a ton of apps installed on the SD card and don't find any negative impact on day to day use. That said if I could have bought a 32 or 64GB version of the Play I would have instead of the 16GB version.
Your never going to see the tested speed in the phone equal the SD card out of the phone.
Sent from my XT1563 using Tapatalk
rockyrobin said:
Just Popped a Samsung Pro card in which is rated as 90/80 and an only seeing 54/21 so am assuming the sdcard interface is neutered in some way compared to some other higher end phones.
Anyone else noticing this performance ceiling?
Click to expand...
Click to collapse
http://forum.xda-developers.com/moto-x-play/help/wich-sd-card-t3237228/page2