Database Develop

Which SD is the best?

Hi!
First, what is class 2 and class 6? Which is the best 2 or 6 in this case?
And which one of these two is the best:
Nokia MU 43 8 Gb MicroSDHC-11
or
Transcend microSDHC 8GB (Class 2) (TS8GUSDHC2)
- Class 2 specifikation - Support för Error Correcting Code (ECC)

Class mainly refers to read/write speed of the SD Card, the better the class the faster will be the data transfer speed but be careful with class 6 or class 8 cards on higher end memory like 8GB, 16GB or 32GB that has more tendency to give error. Class 4 is your best bet.

yusufjee said:
Class mainly refers to read/write speed of the SD Card, the better the class the faster will be the data transfer speed but be careful with class 6 or class 8 cards on higher end memory like 8GB, 16GB or 32GB that has more tendency to give error. Class 4 is your best bet.
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Hi! And thanks!
I did go with the:
Kingston Micro SDHC Kort (TransFlash) - 8GB...
Kingston kort (TransFlash) - 8GB Class 4 - inkl. adapter. - SDHC kompatibel - Read-/write hastighet 58x (8,8 MB / s) / 45X (6,5 MB / s)
Hope this is better than the one i had, did not know about classes at all.

if you are installing and running thing of the SD always go for the higher class card.

I have a class 6, 16GB SanDisk which I have had since they
were first available.
I have had no problems with it from day 1.
​

tkalli said:
I have a class 6, 16GB SanDisk which I have had since they
were first available.
I have had no problems with it from day 1.
​
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I cannot find a 16gb sandisk class 6 anywhere. I can't even find a class 6 microsd sandisk period. Where did you find it?

jas0nw0ng said:
I cannot find a 16gb sandisk class 6 anywhere. I can't even find a class 6 microsd sandisk period. Where did you find it?
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Sorry, it is a Transcend 16GB Class 6.
The Sandisk 16GB in other phone is a class 2.
​

I just bought a kingston 32gb class 6 micro sdhc but when ever i put it in my hd2 it just freezes up and as soon as I remove the card it works fine again.At first i though that it was a fake so I:
1)performed multiple tests,
2)reformated a 1000 times,
3)even putting 20gb of data just to make sure.
Turns out that it is authentic and it works perfectly on my girlfriend's htc BalckStone it also worked when I installed NAND (which i later removed due to insufficient memory).Ive been searching for days, I think its a windows mobile issue, any tips??

you formatted it 1000 times ?
btw i use a class 4 8gb and no problem except it sometime cannot boot android, i dunno if its the sd problem or android problem

Difference between Sandisk Ultra microsd card and normal card?

I'm going to buy a 16GB microsd card from sandisk. I've been finding on Amazon and found these two products:
Sandisk 16GB Mobile Ultra MicroSD Card : £36.00
SanDisk 16GB microSDHC Memory Card : £15.99
I've also noticed they're all class 2 (can't find a class 4 or class 6 sandisk). So what is the difference between them? I'm using the card for Windows Phone 7, so which one should I buy?

http://en.wikipedia.org/wiki/SD_Memory_Card#SDHC_cards_with_greater_than_32.C2.A0GB_capacity
as I understand it the only advantage of SDHC is an increased card storage. And im not sure if an SDHC card works in the HD2.

uxu said:
http://en.wikipedia.org/wiki/SD_Memory_Card#SDHC_cards_with_greater_than_32.C2.A0GB_capacity
as I understand it the only advantage of SDHC is an increased card storage. And im not sure if an SDHC card works in the HD2.
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Both of them should be SDHC (>2GB). I'm asking about the Ultra thing.

Zell Dinch said:
Both of them should be SDHC (>2GB). I'm asking about the Ultra thing.
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Sorry, got it wrong

They're the same thing. One has an adapter however

Ultra means it has higher transfer speeds.
There's also Ultra and Extreme in the regular SDs.
Ultra=15 mb/s
Extreme=30 mb/s
So it's all about speed.

@apallohadas: they have different model number, one is SDSDQY-016G-E11M and one is SDSDQ-016G-FFP. And I suspect that just a card reader will make that difference in price.
@joooe: but they're both class 2?

I've tried several different class cards in my HD2, and regardless of advertised 'class' r/w speeds only changed noticeably if I took it out of my phone and used a card reader or adapter like shown in the "ultra" listing you have.

apallohadas said:
I've tried several different class cards in my HD2, and regardless of advertised 'class' r/w speeds only changed noticeably if I took it out of my phone and used a card reader or adapter like shown in the "ultra" listing you have.
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Hello apallohadas
can you confirm or any one without any doubt that there is no difference in R/W speed between class 2 or class 4 or class 6 inside HD2 with Windows 6.5 or Android
thanks

secoseco said:
Hello apallohadas
can you confirm or any one without any doubt that there is no difference in R/W speed between class 2 or class 4 or class 6 inside HD2 with Windows 6.5 or Android
thanks
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I don't have Winmo installed on my phone anymore, so I can't rerun that test and I didn't keep the numbers last time that I did it.
But if you'd like to try testing cards yourself, I used a program called H2test and a card adapter. My Class 2 Sandisk 32GB card gave numbers comparable to a class 6 Transcend 16GB.
Inside of the HD2 however, while on Android the tests take too long (setting read/write file sizes of 1GB+.) I've read in several places that the hardware limits performance as though they were all class 2 cards.

There are reviews where a class 4 card is superior to a class 6 card.
Sandisk cards are just great.
In the sandisk website there is no info about the class of both cards. Don't believe they have the same class.

apallohadas said:
I I've read in several places that the hardware limits performance as though they were all class 2 cards.
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thank you apallohadas for replay
I think so, hardware limitation to Class 2 with HD2 although I read in several places that there is more performance with Class 6 or 10 card in Android especially SD Android
I have Sandisk 16G class 2 and want to upgrade to 32G and I don't want to wast my money in useless class 6 or 10 with my EU HD2,
any one use Sandisk class2 then upgrade to class4 or 6 with EU HD2 and get faster performance in read and write inside HD2 not as disk drive ??
thanks

[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..

About Memory Card: Sandisk 16 GB Class 10 Micro Memory Card.

Does any one Has This?
As you all know the ace's internal memory has very low and a class 4 sd card is not fully supported the scripts like app2sd, link2sd etc..
You have to have atleast class 6 sd card to work that scripts on your device and increase the internal memory of your device.
I am planning to buy a 16 GB Class 10 sandisk micro memory card with 5 year warrenty from filpkart.
I want to know about the review.
You can post about your memory cards and their classes.
Is there anybody has the class 10 micro sd?
Hows the performance are getting?
Sent from my GT-S5830 using xda premium

I have the class 10 (UHS I) 16 GB sandisk micro sd card...works good, but you wont see much difference on your phone for basic things if u buy a class 6 or 8...but overall ifvyou notice closely, yes it is fast ...
Sent from my Ace, Galaxy Ace.

Fyi, I had 3 partitions on this, for storage, swap and sd-ext (Amarullz script installed)...
Sent from my Ace, Galaxy Ace.

sandisk 16gb class 10 mobile ultra
buy from here http://adexmart.com/memory-cards/4419-sandisk-16gb-mobile-ultra-microsdhc-card-class-10.html for 775rs
i am using it with int2ext+ by creating ext3 partition using clockwork mod
i have also tried amarullz
speed is awesome!!
dont buy from flipkart its expensive http://www.flipkart.com/sandisk-mem...-cb369ed42598&srno=m_1_2&otracker=from-search

Using a class 10 16 GB SanDisk Ultra micro SD. Comes with a lifetime warranty (10 years in Canada) and only costs $30 CDN. It was a really worthwhile purchase and I find that it works way better than the stocked 4GB class 4 Samsung one.

Same for me, i'm using Sandisk 16 GB Class 10, works fine for almost 2 years, i've tried amarullz script and link2sd, both worked just fine

Transcend
I am using a Transcend 16GB Class 10 micro sd and its awesome.

I'm using a Samsung class 10 and tested the R/W speed using A1 SD Bench. It gave me 10.32 MB/s on read and 6.22 MB/s on write. I do feel the difference with the older, a Sandisk Class 4.

Cards...
I have to many cards.
Sandisk 200gig, 64igig, 3-32gig,4-16gig

Class 4 san disk cards are better than class 10 san disk cards for dual booting?

I was reading this forum post which claimed that a class 4 card is actually faster than a class 10 card for Cyanogenmod on the microsd card. Is that true? I currently have the 64GB san disk class 10 card (the red/grey one) as my card. It does tend to lag a bit if i'm swiping from one home screen to another. Would a class 4 card give me smoother performance?
http://forums.anandtech.com/showpost.php?p=34988392&postcount=30

If it's a Sandisk class 10, it's probably fine.
What the problem is that Sandisk's class 4 cards often perform better than the class 10 cards from other manufactures like Patriot. I have a class 4 Sandisk and a class 10 Patriot and the Sandisk is superior at 4k performance. But the class 10 Sandisk is probably fine (assuming it's a real Sandisk and not a counterfeit).

Ravynmagi said:
If it's a Sandisk class 10, it's probably fine.
What the problem is that Sandisk's class 4 cards often perform better than the class 10 cards from other manufactures like Patriot. I have a class 4 Sandisk and a class 10 Patriot and the Sandisk is superior at 4k performance. But the class 10 Sandisk is probably fine (assuming it's a real Sandisk and not a counterfeit).
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Thanks, oh you're Ravynmagi from that same thread eh? Hahaha

Class 10 cards are best for long r/w for large files or a video camera. Most of what the tablet or phones do are shorter r/w and a class 6 or 4 will do fine or even be superior. This is particularly true for cards that are used for part of the operating system. This info was gleaned from experience with Android, NativeSD roms. If you search nativesd + hd2 there much info.
Many of the class 10 labeled cards are mislabeled anyway. A name brand like Sandisk will be more quality tested and properly labeled.

Hello guys, this is my first post here. Instead of starting a new thread, I thought it'll be appropriate to post in a thread about sd cards. I'm planning to buy microsd cards for my new Nook HD+, which is on the way. Does UHS-1 micreosd cards work with Nook HD+? I want to dual boot with cynagen mod on sd card. Which class'll be the best for running android from the sdcard? Also I want to make a back up of my Nook HD+ stock version, what size card is enough for that?
The card that I have in mind is a Strontium 16GB UHS-1 MicroSDHC Card. In its product description it says "Compatible with SDHC and SDXC host devices; not compatible with standard SD-enabled devices/readers" and "Compliant with the new UHS-I specification for ultra-high speed interfaces for SD specifications. Can only be used in UHS-I mode in UHS-I compatible devices." (I can't post link since it's my first post)
I got confused after reading that highest class won't give optimal performance. I hope some one here will help me in this. Thank you.

mashac said:
Hello guys, this is my first post here. Instead of starting a new thread, I thought it'll be appropriate to post in a thread about sd cards. I'm planning to buy microsd cards for my new Nook HD+, which is on the way. Does UHS-1 micreosd cards work with Nook HD+? I want to dual boot with cynagen mod on sd card. Which class'll be the best for running android from the sdcard? Also I want to make a back up of my Nook HD+ stock version, what size card is enough for that?
The card that I have in mind is a Strontium 16GB UHS-1 MicroSDHC Card. In its product description it says "Compatible with SDHC and SDXC host devices; not compatible with standard SD-enabled devices/readers" and "Compliant with the new UHS-I specification for ultra-high speed interfaces for SD specifications. Can only be used in UHS-I mode in UHS-I compatible devices." (I can't post link since it's my first post)
I got confused after reading that highest class won't give optimal performance. I hope some one here will help me in this. Thank you.
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Click to collapse
SanDisk class 4 are the best to use for everything on the HD/HD+. The device does not work reliably with faster cards.
You need about 1.5GB to do a stock backup, so a 2GB is enough.
Sent from my Nook HD+ running CM10.1 on emmc.

leapinlar said:
SanDisk class 4 are the best to use for everything on the HD/HD+. The device does not work reliably with faster cards.
You need about 1.5GB to do a stock backup, so a 2GB is enough.
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Thanks leapinlar for that quick reply. So, a 16 or 32GB class 4 sandisk card for the dual boot and another 2GB card for the stock backup is all I need. Thanks again.

The "class' rating is only a measure of large sequential write performance, as in using it for an HD video camera. The class rating has no bearing at all on random access speeds or small reads and writes. Many sandisk class 4's have faster small random read/write performance than many class 10 cards, but its worthwhile to look at benchmarks for a card you're looking at or a list of top cards for tablet/phone usage that keys on small random read/write performance for optimal performance.
In fact, the sd card market is loaded with class 10 cards that stink at pretty much every other measure than large sequential writes.

SD cards 16G and larger are only made as class 10 devices. Properly formatting the SD card will improve it's performance.

Onageric said:
SD cards 16G and larger are only made as class 10 devices. Properly formatting the SD card will improve it's performance.
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No they are not. Here is a 32GB class 4 SanDisk available http://www.mymemory.co.uk/Micro-SDHC/SanDisk/SanDisk-32GB-Micro-SD-(SDHC)-Card---Class-4

artesea said:
No they are not. Here is a 32GB class 4 SanDisk available http://www.mymemory.co.uk/Micro-SDHC/SanDisk/SanDisk-32GB-Micro-SD-(SDHC)-Card---Class-4
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To be more specific - SD cards 16G and greater are manufactured to meet class 10 standards. To get the most money from their products the production line is optimized to make the fastest and most expensive product. Products that miss the QC marks for "A" grade (class 10) will/should easily pass "B" grade (class 4) specifications. The class 10 data bus can run at faster speeds than a class 4. It can also
r u n s l o w e r, meeting fully the class 4 specifications. Often manufacturers will mark their perfectly good class 10 products as class 4 to fulfill market demands. Think making money.

Onageric said:
Often manufacturers will mark their perfectly good class 10 products as class 4 to fulfill market demands. Think making money.
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It's seems to be true. Bought "Exployd 4 class micro SD" and it's running at 10 class speed at read/write (always over 12Mb).

See this thread http://forum.xda-developers.com/showthread.php?t=1005633 for extensive discussions of comparative performance of different vendor/model SD-cards. For the purpose of running ROMs, look out for cards with high throughput in randomized read/write access, not in sequential read/write access.
FWIW, I am using exclusively Sandisk class 4, having had terrible results (lots of Wait & Force-Close) with class 10 and 6 cards from a mix of vendors.