Can the Streak actually benefit from a class 10 card in terms of I/O speed on the internal bus, or would a class 10 be a waste of money?
Maybe I didn't title the thread correctly to correspond to the actual question I'm asking, which is actually about the I/O speed of the internal bus on the Streak itself.
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Has anyone tried the "Ultra" Mini SD card? Supposedly it is has faster read/write capability than a standard card. If yes, could you tell any difference using it in your Wizard
Yep got one myself, does seam to improve running tomtom on it thats for sure
~Hope that helps.
M3NF,
Thanks. I've put some DVDs on mine and need more room.
I purchased two of the highspeed sandisk ultra 2gb cards. After some research and practical use I found out that the following performance seems to hold true. The standard transfer rate for the regular minidisk is < 2mb of IO transfer, while the ultra is supposed to be rated for approximately 9-11 mb of IO transfer. I have seen smaller capacity cards that claim 150x speeds or approximately 20 mb of IO transfer.
Hope this helps,
Bob
I purchased two of the highspeed sandisk ultra 2gb cards. After some research and practical use I found out that the following performance seems to hold true. The standard transfer rate for the regular minidisk is < 2mb of IO transfer, while the ultra is supposed to be rated for approximately 9-11 mb of IO transfer. I have seen smaller capacity cards that claim 150x speeds or approximately 20 mb of IO transfer.
Hope this helps,
Bob
On the G1 what the read speed on the internal sdcard reader because for some reason with compcache it don't make no difference if i use my 8gb class 6 micro sdhc or the standard 2gb class 2 sd. I was thinking maybe G1 phones internal reader dosn't let the class 6 run to full potential so if someone made or know how you can get a benchmark off the phone on whats the read\write speed of the card when inserted into the G1 would be appritiated.
wasuup said:
On the G1 what the read speed on the internal sdcard reader because for some reason with compcache it don't make no difference if i use my 8gb class 6 micro sdhc or the standard 2gb class 2 sd. I was thinking maybe G1 phones internal reader dosn't let the class 6 run to full potential so if someone made or know how you can get a benchmark off the phone on whats the read\write speed of the card when inserted into the G1 would be appritiated.
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Eh, compcache is compressed-swap-on-ramdisk, how could the speed of the sdcard possibly have any effect on that?
Also, sd card classes don't indicate a MAXIMUM speed, only a MINIMUM speed, so there are class2 cards out there that would qualify as class6. This is particularly notable in cases where the class2 card model was initially manufactured BEFORE the class 4 or 6 standards were defined. There is also a degree of manufacturing tolerance to it. I.e., some units are *just faster* than other.
I have a Magic 32A, i purchased a Class2 8GB a while back, is it necessary to change it to class 6?
No, the class 2 card should be working fine, it's just gonna be slower.
http://en.wikipedia.org/wiki/Secure_Digital_card#Speeds
cheers
Try the general category/section next time you have a non games/application related question!
Actually the class rating is for write speeds more than read. If your just using it to store music, video etc and not apps2sd or swap (why would you with a 32A?) than there should be very little difference.
Clinton
their speed is directly related to the class.
class 6 goes 6 times faster than a class 1 and so on.
whatever you read/write on the SD will suffer from a class2.
FYI, gallery etc they all create thumbnails etc on the SD card (no matter is your using app2sd or not).
I would DEFINITELY not get a class 2.
Maybe a class4, but with the difference in price I dont understand why not a class6.
I found very little difference between class 2, class 4 and class 6 when using for storage. (music, photo etc) These where all of the same size for testing (4GB cheap) and there was no noticeable difference in any of them as far as opening music form the player or browsing the gallery.
I know here in Canada if you can find them class6 16gb cards are twicw as much as the class2 cards. I paid $52 for my 16gb class2 and the cheapest I can locate on in Canada is $111 plus shipping, so not that cheap.
Clinton
A thing to remember, is that the class is the minimum guaranteed speed – not the maximum. So a class 2 guarantee you a speed of mimimum 2MB/s, a class 4 - 4MB/s etc. But the maximum speed is actually the interesting thing – and that depends wary much on the quality of the card.
So when you buy a new card – have the quality in mind. I’ll rather buy a quality brand class 2 or 4 card then a “no-name ebay” class 6, as the maximum speed of the quality cards is properly better than that of the no name one… ;-)
I have gone through a dozen or more cards and I can tell you class 6 versus a class 2/4 makes a difference. The size of the SD card also makes a difference, the less space to look in the shorter it takes. If you bought a $300 phone like me $35 isnt so bad to make the most of it. My perfect balance is the 16GB class 6 I use in my daily phone, plenty of space and fast for apps2sd.
stock class 2(?) 1GB upgraded to 8GB class 6 on cyan 4.0.4.
I noticed it has sped up a LOT, mostly noticeable when typing, I have turned on vibrate and its still faster.
I recently upgraded my class 2 card to a class 6 card and noticed when writing a rom to the SD root the speed is the same speed (around 1.75mb/s)?
I'm doing this with the SDCard in the phone and a usb cable.
Also my class 6 is a Adata 8gb class 6, and my class 2 was a SanDisk 2gb.
Would this be the hardware limiting (g1) or something else?
Fwiw when rooting a buddies mytouch3g and his class 4 card it would write much faster (~3-4mb/s).
The speed did increase but it is also having to look through 2x the amount of data as well. I read this somewhere, and I am also Googling it now as we speak to come up with a reference link for you. Basically if you have a 2gb card that's class 2 and class 6 you are going to see a speed increase on the class 6 card, but, if you go from a 2gb class 2 card to a 6-8gb class 6 card, you are not going to see much of an increase if any at all due to the increased size and the time it takes to write data over the card. This is a fragmentation issue as I read it.
Please, don't take this as 100% fact, just something I read when I did my research about 4 months ago.
Hope that helps
Digitaldreamer7 said:
The speed did increase but it is also having to look through 2x the amount of data as well. I read this somewhere, and I am also Googling it now as we speak to come up with a reference link for you. Basically if you have a 2gb card that's class 2 and class 6 you are going to see a speed increase on the class 6 card, but, if you go from a 2gb class 2 card to a 6-8gb class 6 card, you are not going to see much of an increase if any at all due to the increased size and the time it takes to write data over the card. This is a fragmentation issue as I read it.
Please, don't take this as 100% fact, just something I read when I did my research about 4 months ago.
Hope that helps
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well that sucks lol
but you are saying if we go from Class 2 8 Gig to Class 6 8 Gig, there will be a increase?
Sorry guys but your theories are way off=p It's the USB cable thats at fault. Either get a better USB, or put it in a mircosd card reader and you should see speeds roughly at 10mb/s write and 20mb/s read (at least those are mine with a samsung class 6 from amazon=p)
PS: Who ever heard of a 6gb sdcard? they come in exponents of 2: 2, 4, 8, 16, 32, 64, 128, 256, 512, 1,024, 2,048, 4,096, 8,192, 16,384, 32,768....
yeah I'm pretty darn bored if you can't tell....
I pulled the card out and put it on a card reader and it would write about 9-10MB/s, but still only 1.5-1.75MB/s though the G1 (usb mounted).
It's the usb that is limiting you (I think). Think of it as filling a pool with a 12-inch fire house that is running through a funnel=p. Try a different USB cable.
mejorguille said:
It's the usb that is limiting you (I think). Think of it as filling a pool with a 12-inch fire house that is running through a funnel=p. Try a different USB cable.
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I'm using the same cable for both the G1 and the card reader. I assume its just the G1s USB driver/transfer protocol thats causing the issues.
Hi, I have a question. I have a class 2 sdcard (I think, and it's most probably true) which I partitioned with ext4 to use a2sd. I realised that my app-loading speed decreased tremendously. I think the reason is with my class2 sdcard, which can only support 2mbps data transfer. So I was wondering which class of sdcard I should buy for the loading speed to be almost or totally the same as if the app is installed on the phone.
atleast:- class 4
OK:- class 6
best:- class 10