I begin to run out of space and in need of new SD card. What kind of SD card should i use? Van i use sandisk 16GB SDHC class 4. What does the class means?
sent from my Nook Color
Class 4 means the sequential read/write speed is about 5 megabytes per second. This is not necessarily what you want as its the random read/write that dictates most performance, and that doesn't seem to correlate much with the Class from the benchmarks others have done.
Would like to point out that for NC you need a microSDHC card, not just a SDHC card.
From all the data collected so far, 16GB class 4 SanDisk microSDHC card (used as system ROM) seems to be good for NC.
Related
i have a class 2 sd card that is 4gb. i read that you need class 6 for apps to sd card? will it not work on class 2?
It'll work but it'll just lag your phone down whenever any writing is taking place since the write speed is only 2mb/s compared to a class 6, 6mb/s.
Keep in mind that SDHC "class" system is only a guaranteed minimum. There are some class 4 cards out there that actually out perform some class 6 cards. Do your homework (read:google) and get a card that is > 8MB/s write and > 9MB/s read and you will max out the speed capabilities of your G1.
I can personally verify that the AData class 6 8G and the SanDisk class 6 8G both outperform the G1's capabilities. Also, from what I have read, the SanDisk class 4 16GB also outperforms the G1's capabilities.
Also, I have found that even though the SanDisk and the AData cards mentioned above exceed the G1's capabilities, the AData card is a better card for the G1 (in my particular case.) For some reason my Sandisk card can only get 6.5MB/s write and my AData card can get 8MB/s+ write speed on the G1.
Link to speed tests (please add to it if you have more info)
http://forums.t-mobile.com/tmbl/board/message?board.id=AndroidHardware&thread.id=357
i have a class 4 8GB card and i moved my apps to the sd card about a month ago...it was VERY laggy, so i went back to keeping the apps in the G1's internal memory.
i will try again when i get a class 6.
I have a class 2 16GB Sandisk card, and I have to say - there are no lags whatsoever. The card is much faster than the stock 1GB one, and if moving applications, you don't need that much write speed - the read speed is much more important. I can get 14 MB/sec read speed via cardreader with this card, while the stock 1GB one gives 5 MB/sec only (tested with hdparm).
Just remember - move only applications, NOT their data or caches (which is really unstable anyway). You should have no problems with speed this way - application startup is still fast (if a program is 7 MB, it needs 0.5 sec to be read, which is perfectly acceptable), and you still write to the phone's internal memory.
Hi All,
Just got myself a 16GB version of one of these:
http://www.transcend-uk.com/Products/ModDetail.asp?ModNo=195&SpNo=1&LangNo=0
to replace the stock 8GB Class 2 card that came with the phone. Unpackaged carefully to avoid dribbling on it
Have run benchmarks using both SKTools and Pocket Mechanic and ..... approx 5% SLOWER than standard card!! Have got SDTuneUp loaded, am I missing something glaringly obvious here???
SKTools summary results:
8GB Class 2 Sandisk (supplied with phone):
Buffered Write speed 910 KB/s
Read speed 7119 KB/s
16GB Class 6 Transcend:
Write speed 859 KB/s
Read speed 7021 KB/s
Could the glaringly obvious thing be *don't buy Transcend cards* ??!!! Am I benchmarking with the wrong software (figures vary greatly between the 2 apps but summary is the same - this card is slower)
Any tweaks I'm missing?
Cheers.
Bones.
Is this with the card in the phone or in a card reader?
Most likely it's the limitation of the phone. Try some desktop benchmarks with a good card reader.
You won't gain much speed from higher speeds cards on a phone.
ez2remember said:
Most likely it's the limitation of the phone. Try some desktop benchmarks with a good card reader.
You won't gain much speed from higher speeds cards on a phone.
Click to expand...
Click to collapse
hmm so whats the point of buying a higher class SD card?
Benchmarked in phone. I'll try in my card reader tomorrow. Got to say I'd be very disappointed if it's a hardware limit in the phone, class 2 cards are much cheaper than class 6 and HTC should have made this apparent if this is the case...
Will update when re-benchmarked, anyone got an comparison stats?
one comparison Class 6 to Class 4
At hand a Transcend 16gb Class 6 and Toshiba 2gb Class 4 SD cards measured in Thinkpad card reader:
Crystal Disk Mark mb/s
Transcend/Toshiba
Seq: 14.78/12.11 read 8.755/5.315 write
512K: 14.76/12.09 read 1.982/2.010 write
4k: 3.114/3.216 read 0.025/0.025 write
Not much there to recommend Class 6
Are you sure you have 8GB class 2 sandisk card? I got class 6 with the ppc.
My results in SKTools:
write: 642 KB/sec
read: 2963 KB/sec
That's 16GB class 2 sandisk card formatted with 32KB clusters. So i think your card is ok
Double post
Class6 does not mean that its faster its just "assure" you it can transfer up to 6mb/s. Thats prolly a device limit and not the card you should try it on a notebook or card reader outside phone. I thought the same when i bought a 16gb sdhc class6 SD for my axim - had no changes in speed at all =\
I'm planning on buying a class 10 micro SD card, would it be faster to boot off of it rather than the internal storage?
If you're planning to boot from SD, a class 10 card is the last thing you want. Class 4 Sandisks in the 8-32GB range outperform other cards by one or two orders of magnitude. See this thread: http://forum.xda-developers.com/showthread.php?t=1005633 Class 2 and unclassed Sandisks of the same sizes are comparable, too. Card class doesn't measure anything relevant to running a ROM from SD.
However, both SD and eMMC are pretty identical in terms of speed/benchmarks, and SD installs seem to more often have issues with stability, so if you have no qualms about your warranty and/or giving up the B&N proprietary features (in-store reading, kids' books), you may as well go ahead and install to eMMC, in which case a class 10 card won't cause you any problems. Keep in mind that most devices other than high-end digital cameras can't run any card higher than a class 6 at its advertised large-sequential-r/w speed (nor would they benefit from doing so).
Booting off uSD gives you more options to play with BUT you MUST have a very GOOD uSD to begin with and the BEST uSD for some reason to be Sandisk class 2 or class 4.
eMMC is always faster but if you go the SD card route make sure it's a sandisk
Sent from my phone using Tapatalk
Hi,
I am a newbie . Got my first ever android (samsung galaxy Y 5360) the other day. Rooted it too . Found out my phone's got low internal storage memory. I want to increase my phone's internal memory by using link2sd (or any other better app if present) and loading apps from my microsd card. I am now trying to get a good sd card to do the needful.
What I wanted to know is which is the optimal sd card(not particular about brand) with its class number (4gb class 4, 8gb class 6, 16gb class 10, etc) that I can use so that I can get "the best performance" out of my "Galaxy Y."
I was going to go for a 16gb class 10 microsd card but upon using Google i saw in some places class 6 is better for small read writes like in the case of using link2sd app and that class 10 is better for transferring of big files (and making videos and stuff) and that there's going to be lag in class 10 cards of 16 gb and 32 gb, etc for my purpose. At some other places i saw that class 10 is always better no matter what. Or maybe i just misunderstood the whole thing.
For example for my above purpose, is an 8gb (or 16gb) class 6 card going to perform better than an 8gb(or 16gb) class 10 card
thank you
The higher the class the better the read/write speed
I had a 32gb class 10 and it worked fine - to be honest apart from transferring very large files (and fat32 doesn't support larger than 2gb file) you probably will not notice any difference
marcussmith2626 said:
The higher the class the better the read/write speed
I had a 32gb class 10 and it worked fine - to be honest apart from transferring very large files (and fat32 doesn't support larger than 2gb file) you probably will not notice any difference
Click to expand...
Click to collapse
Thanks
Why does it come to me when I insert a sd card "the sd memory card is too slow for your device, can have failures when running applications"? Is a sd card from 32GB to 70MB / S
Thanks!!
What SD card do you have? The SD card you have might be too slow in terms of write speed, since Class 10 SD cards are not all the same (confusingly). I think you'll want to buy a micro SD card that has at least Class 10 UHS Speed Class 3 (UHS-3), particularly if you want to use it as adoptable storage. UHS-3 has a minimum write speed of 30 MB/s and the UHS-3 marking can be seen on the packaging and SD card as a U with a 3 inside. I've seen UHS video SD cards (e.g. v30, v60) around that are potentially faster than UHS-3 but I'm not sure if our Moto G4s can make use of the faster speeds.
https://www.sdcard.org/developers/overview/speed_class/ and https://www.sdcard.org/consumers/choices/speed_class/index.html have a good overview, and as an example of what you could buy, https://www.amazon.co.uk/SanDisk-Extreme-microSDHC-Memory-Adapter/dp/B01HXR511A/