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
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For those of you who have upgraded your SD cards: what class of SD card do you have? Is it worth the extra money to get anything other than a Class 2 card?
I stuck with the class 2. I read the more expensive class is more suitable for capturing hd video. I don't do alot of that, I got my 16gb class 2 to store movies.
Samsung Vibrant using Bionix 1.9.1 w/JACs UV/0C v1.1
I have a 16gb card labeled as a class 4 (and priced as such), but it performs like a class 6.
I got it because I was expecting to use Apps2SD at some point in the future and it makes a HUGE difference there.
The stock card is a class 4. I had an 8 GB class 6 from my G1 days that I opted to use instead. Class speed matters, but you need to debate how much read/write are you doing with your SD card. Thankfully the Vibrant has a lot of internal memory too.
The higher the class the more rapid the data transfer. But a reputable, like Sandisk class 4 will outperform a "Joe's SD Co." Class 6 in my experience. I was running a2sd on my G1 with the stock class 2 and I had time to make a sandwich while waiting for apps to open, better result with a class6. Also when transferring large amounts of data between PC and device it will significantly cut down the time.
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Class 6 16 gig
have a class 6 16 gig I use alot for data storage fro my work. I have found the Kingston class 10 is slower than this one, read/write speed DO matter if you use it alot, and I do. Silicon power is releasing a class 10 16 gig when I get one Ill report back it benches and see if it meets the stated benches it is claiming
So Ive been using the 16gb Class 2 sd card that came with my HD2 for WP7 and I havent really had any problems with it. Occasionally it reboots for no reason, but aside from that, its perfect. However, my friend just gave me his 4gb Class 4 card. Should I keep using the 16gb or reset my phone with the faster 4gb?
simple test, all sd cards work differently
my Nokia 4GB Class 6 is better than may Sandisk 16GB Class 2
Xbox Live Installation: ( only the installation without download )
Nokia 4GB Class 6: 1:23 minutes
Sandisk 16GB Class 2: 9:41 minutes
peace warhead said:
So Ive been using the 16gb Class 2 sd card that came with my HD2 for WP7 and I havent really had any problems with it. Occasionally it reboots for no reason, but aside from that, its perfect. However, my friend just gave me his 4gb Class 4 card. Should I keep using the 16gb or reset my phone with the faster 4gb?
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Class 2 cards usually work better for wp7. Actually class means nothing when it comes to wp7... you want good random access speed for wp7 to run smooth. Many times, the tricks that manufacturers do to their cards to get higher sequential write speeds will actually reduce the random access speed. They don't keep the random access speed consistent on any of their cards as that speed isn't rated, so even cards of the same brand and class can differ greatly from batch to batch. A card made one day may run wp7 well while the same card made a month later may not. So far it seems class 2 sandisk are the most consistent in keeping good random access speed, so if you are going for a card for wp7, go for class 2 sandisk with model numbers ending in A11M. If you already have a card that works well, no reason to switch unless you want to change the size, because there's no way to guarantee a card will work well until it's tested.
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.
How much does the class rating of an SD card make a difference in a phone?
New Egg has a great deal on a 16GB Class 4 card.
I have a class 4 card now, but I've never used a 6 or 10. So I don't know if there's a whole world of performance I'm missing out on.
I run Cyanogen so I do have a considerable amount of APP2SD action going on. But I don't otherwise write to the SD card a considerable amount. Don't take a lot of videos....don't transfer 4 or 5 GB worth of music everyday. Nothing like that.
Visit Wikipedia or Google for the transfer rates and think about how much I/O you will be doing. The more stuff apps and data you store on your card the more important the performace and compare that to what experience you have.
Being used to sticking a stick in a USB 1.1 slot and groaning at old computers, so I tend to divide by 2 when judging such things. E.g. if it's 480m/b, I make the expectation off reality being closer to 240m/b. Can't complain about MicroSD's much since my current handset has a freebie 2GB >_<. I assume it's class 4 but it is fine for me, and most of my stuff is on it.
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Take one thing into consideration: class of the SD card means nothing, if the device's own transfer (specifically, write) rate is too slow to utilize it.
Jack_R1 said:
Take one thing into consideration: class of the SD card means nothing, if the device's own transfer (specifically, write) rate is too slow to utilize it.
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Well that's a good point.
I have no idea what the write speed of a MT4G is. But I've had a Class 4 card since I bought the phone and it seems to work nicely. I've never said "Man I can't believe it's taking this long to save this file!"
So I went for the $17 special on New Egg for a 16GB Kingston card.
Search micro SD card 16gb on New Egg. It's the cheapest one. Brand name. Free shipping. Can't go wrong there.
No point in getting a class 10 unless you transfer via this usb adapters.. I think the mytouch stops at like class 8. Not worth it unless on sale. You can live with a couple seconds of wait time
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Jack_R1 said:
Take one thing into consideration: class of the SD card means nothing, if the device's own transfer (specifically, write) rate is too slow to utilize it.
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I agree, I wouldn't go any higher than a class 4 or 6 for a phone. I have a ADATA 16gb class 6 and have never had any problems with transfer/read/write speeds
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I have a Class 10 card, but only because I transfer files to and from my computer on a semi-regular basis. I used an 8GB microSDHC Class 4 card in my previous phone and one time I found myself needing to transfer a lot of data off of a computer. All I had left on hand was that Class 4 card with its SD adapter and it was horribly slow in my SanDisk MicroMate adapter that I typically use in conjunction with a 4GB SanDisk Extreme III SDHC card as a flash drive.
I agree that you're not going to get much more out of the phone itself beyond Class 6.
Sorry if this was already asked but I tried searching. What type of class micro sd card will I actually benefit from? A samsung class 4 32gb is out there for a good price but if the tablet will actually take advantage of a class 10 I would get one of those.
for the most part it will not. Except in moving large files to and from the card.maybe playing movies from the card.but even movies are OK on 4.6 class cards..if you could run apps or have there data from SD card then it would be a big improvement. I have used a 8 gig class 4 and now have a 32gig class 10.can't tell much difference other then when pushing roms and other large files to my tablet over USB.
I would say get 6 minimum but if you have the cash faster is always better. Just don't go out and spend the money if you have a class 4card.
Im sure you will hear diffeent from others.
Not really. I have 5 sd's, and no difference between class4 and class 10.
Up to a certain size that is. Anything more than 16gb, and I would move to a class 10.
Rumor has it, that you can run a 64gb. If you partition it with Partition Magic.
I think it depends on what you are using the card for. I don't think it is the tablet that would take advantage as much as a particular app that would. If you were using apps that required fast read/write access to the card (and you were actually using the card as opposed to the internal memory) then the faster card would be best. Keep in mind that not all class 10s are the same so also make sure to look at some of the benchmarks for the different cards. I know in terms of photography and hd video captures that a higher class card really does make a difference...but that is just an example of a real use application.
Hope that made sense.