Database Develop

Whats the read\write speed of my sdcard using my G1

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.

SD card transfer rates

i currently use a sandisk 2 gig micro sd card on my g1 and decided to upgrade my mem card...again..(i got shafted when i ordered a kingston 4 gig class 4 on amazon....the memory card didnt work)
so i was wondering what is the transfer rate or my 2 gig card. i just want to make a comparison to where is stands with sdhc cards.
i googled for my answer but gettings mixed info and jsut mumbo jumbo.
EDIT: oh yea i was reading that JACs roms are optimized for class 6 sd cards.. is this true? since i have been reading ppl saying "oh this is the fastest hero rom " but i always found drizzys to be faster...
Class 2: 2 MB/sec minimum data transfer rate
Class 4: 4 MB/sec minimum data transfer rate
Class 6: 6 MB/sec minimum data transfer rate

brian_v3ntura said:
i currently use a sandisk 2 gig micro sd card on my g1 and decided to upgrade my mem card...again..(i got shafted when i ordered a kingston 4 gig class 4 on amazon....the memory card didnt work)
so i was wondering what is the transfer rate or my 2 gig card. i just want to make a comparison to where is stands with sdhc cards.
i googled for my answer but gettings mixed info and jsut mumbo jumbo.
EDIT: oh yea i was reading that JACs roms are optimized for class 6 sd cards.. is this true? since i have been reading ppl saying "oh this is the fastest hero rom " but i always found drizzys to be faster...
Class 2: 2 MB/sec minimum data transfer rate
Class 4: 4 MB/sec minimum data transfer rate
Class 6: 6 MB/sec minimum data transfer rate
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can you take a picture of the card so we can tell you ... or you can tell us what number is in the 'C' on the card

xidominicanoix said:
can you take a picture of the card so we can tell you ... or you can tell us what number is in the 'C' on the card
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oh i know about looking for the "c" but it doesnt have a c. so yea.. =\ i bought the card hmmm summer 2006 when i went to hawaii. mayube summer 07 i cant remember.

does anyone know? i havea sandisk 2 gig.

Doesn't the benchmark app test the read/write speed of the sd card?

evilkorn said:
Doesn't the benchmark app test the read/write speed of the sd card?
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is the app called"benchmark" ? i ran a test but dont understand the result. i dont see anythign pertaining to my sd.

[Q] Class 10 microSD: Can the Galaxy S utilize it?

Hi al,
Does anyone know whether the Samsung Galaxy S (I9000) would actually profit from a Class 10 microSD? Can it utilize the read/write speed of these microSD's?
If not, what is the max. class which the Galaxy S would actually use to its fullest?
Greetings,
Evert

of course it will
this is one of the fatest phone ever
if you have an External class 4 vs another External class 6 card inside this phone then you copy stuff with Astro File inside the phone you'll notice the difference in speed
and then if you compare the class 6 vs a class 10 external you'll see even more difference
this will be very important when Froyo comes out and we can finally use App2SD, as the apps will write and load faster to & from the SD on a class 10 than a class 6 or 4
don't even bother with a class 2 it'll be painful slow
and that comes by experience running apps on SD on all my previous phones

AllGamer said:
of course it will
this is one of the fatest phone ever
if you have an External class 4 vs another External class 6 card inside this phone then you copy stuff with Astro File inside the phone you'll notice the difference in speed
and then if you compare the class 6 vs a class 10 external you'll see even more difference
this will be very important when Froyo comes out and we can finally use App2SD, as the apps will write and load faster to & from the SD on a class 10 than a class 6 or 4
don't even bother with a class 2 it'll be painful slow
and that comes by experience running apps on SD on all my previous phones
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What?
Are you basing this on a test, or are you just assuming that the class 10 microSD is theoretically faster then class 6 ?
Biased on that tech specification your making an assumption that we should get this class 10?
The question is weather or not the SGS Vibrant Bus and Data lines can transfer speeds of 80Mbits/s through the MicroSD card slot??
* Class 2: 16 Mbit/s (2 MB/s)
* Class 4: 32 Mbit/s (4 MB/s)
* Class 6: 48 Mbit/s (6 MB/s)
* Class 10: 80 Mbit/s (10 MB/s)
I would say lets buy them and test it out.

I just had 6MBs towards my internal and 5MBs towards my external sd card at the same time trough the usb connector while the sd is a class 2 =p
The sgs would stil benefit from a class 10 i bet

I have just placed an order for a Kingston SDC10/16GB.
What would be an accurate way to measure read/write speed once this card is in my phone? Simply hook it up to PC and pump a large file to it, and see what the speed/bandwidth is?

when performing test, you will always get the fastest speed when the disk is new (empty)
so the proper way to test for performance speed, is to fill the SD card 50% with random files or random sizes, then do a speed test
that will show the true performance of the sd card
you can try these 3
http://www.appbrain.com/app/sdcardbenchmark/com.p8h.sdcardbenchmark
http://www.appbrain.com/app/sd-card-speed-tester/br.com.fast4ward.sdcardspeedtester
http://www.appbrain.com/app/disk-benchmark-free/com.j.diskbenchmark

Very interested in the results myself! Please do let us know how it goes evert!

Any results ?

I'll check them out. Problem is that most seem to test /sdcard, which is the internal SD, and not [correct folder for external SD]...

i also just wondering if class 10 would make any different in data transfer as rite now i'm using class between class 2 and class 6 for 3 of my 5300 (2) i9000 (4) and n7000 (6)..
any result on the test that you have made? thanks!

I use a transcend 16gb class 10 micro sd and i get a write speed of around 14mbps... on other cards i get 5 or 6mbps...

vigneshnallamad said:
I use a transcend 16gb class 10 micro sd and i get a write speed of around 14mbps... on other cards i get 5 or 6mbps...
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Thanks for the info! Sure feel more confident to get one of these!! Thanks again (and yes i've click the thanks button!) Hehe!!
Regards!

For what it's worth, my speeds are as follows:
Internal: 7mb/s write and 15mb/s read
External: 15mb/s write and 30mb/s read
External is a Transcend class 10 16gb card, almost full and 1yo
Very happy with it
Sent from my GT-I9000 using xda premium

[Q] About SD Card

Hello
I got my Legend about 2 months ago, and I have a big problem with storage space...
What is the biggest sized SD card the Legend can use?
What is the type of SD card (micro, mini, etc...)
What is SD card class?
Thank you very much

microSD compliant with SD2.0 Standard (aka microSDHC)
The biggest size available currently is 32GB.
I don't know if even more is possible with microSDHC or if bigger cards will only be possible with SD3.0 (aka SDXC) but that question is not relevant as you can't buy any greater then 32GB yet.
The Class of the SDCard is a measurement for guaranteed minimum speed in random read/write.
The Class does not provide any information about real-world speed or max speed.
For your mobile phone the class is a pretty useless criterion as you don't need any guaranteed minimum speeds but good overall speeds ESPECIALLY sequential.
The guaranteed minimum speed is important for HD Video Cameras for example where you write data all the time at a given speed (resolution).

thanks.
but I DO need class with high speed because I want to use Data2Ext...

Don't pick uSD card based on class !! class tels you MB/s for sequential write only... you need a card that is overall fast, I had 16GB class 10 Kingston and data2ext was just horrible!
Now I'm with class 4 Sandisk mobile ultra and it is in fact faster in every test I ran...
So read reviews before you buy

ye but that is exactly why im asking...

well then, I recommend sandisk mobile ultra as I have it and it is OK, there are probably faster cards...just see the small files read / write speeds in reviews those are of greatest importance

i purchased a kingston 8GB class 4 which crapped out. android kept reported sdcard unexpectedly removed. tried all sorts (formatting in windows, android, quick, long, etc).
RMA replacement did exactly the same, so i'm guessing kingston class 4's are best avoided.

If I recall correctly I have a 16GB microSDHC Class 4 card. After applying data2ext with this card, my Quadrant scores hit around 1500, which is crazy.
This is where I found my card: http://www.amazon.co.uk/SanDisk-16G...P06K/ref=sr_1_1?ie=UTF8&qid=1298984123&sr=8-1
I personally recommend this card.

witch is better class 4 or class 6?

r69001 said:
Hello
I got my Legend about 2 months ago, and I have a big problem with storage space...
What is the biggest sized SD card the Legend can use?
What is the type of SD card (micro, mini, etc...)
What is SD card class?
Thank you very much
Click to expand...
Click to collapse
Did you by any chance go to HTC's website to read about the phone? It has the full specs listed..
Sent from my Legend using XDA App

dangal said:
witch is better class 4 or class 6?
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class 6 is better , but class 10 is even better

I've got a Sandisk Ultra Mobile 16gb SDHC which works fine in the Legend. Make sure you format it with the phone to stop it being dismounted, well known issue and the fix

[Q] Which SD card to get (class)

I want to change my 2gb SD card for an 8 or 16 gb one. Which one should I get? Should I go for a class 4 or 6, or is class 2 enough?

Get class 6. Class 6 SD cards are fast and if you're intrested, you may use multiboot with that card.

Well better card class better performance on sd...such like apps2sd and if u use a multiboot..but i think there is no specfial need for extra high speed card...
well at least 6th card class u would need!
personally i have 8gb 10 class card atm!

I don't think I can easily find class 8+ cards here. What about this one? I can't find which class it is?: http://www.sandisk.com/products/mobile-memory-products/sandisk-microsdhc

Dexter_prog said:
I don't think I can easily find class 8+ cards here. What about this one? I can't find which class it is?: http://www.sandisk.com/products/mobile-memory-products/sandisk-microsdhc
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I use a lexar micro sdhc 16gb 6 class
I bought from ebay de 35 euros its the original and I have 10 years guarantee
Check it..