Database Users

[Q] Which sd card is better?

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?
Click to expand...
Click to collapse
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.

[Q] tmobile HD2 problem: Microsd 32Gb class 10 copy speed less than 4MB/sec

I got a 32Gb MicroSDHC class-10 memorette card.
I verified the speed with a card reader + h2testw that write speed is : 14.7MByte/sec
read speed: 17.5MByte/sec
But when I used the class10 card in tmobile HD2, I am shocked.
When I copy a 720MB movie the write speed is about 4MByte/sec.
h2testw program when used on hd2 connected to PC, showed write speed as 4.8 MByte/sec only.
It needs to be noted the same card when tested with h2testw and a card reader gave 14MByte/sec but gives less than 4.5MB/sec on HD2.
How to fix this problem of HD2 microsd card speed!
Looks like HD2 usb controller has some problem.
the card is indeed class-10.
Please let me know a solution to this problem on HD2.

downbc1 said:
I got a 32Gb MicroSDHC class-10 memorette card.
I verified the speed with a card reader + h2testw that write speed is : 14.7MByte/sec
read speed: 17.5MByte/sec
But when I used the class10 card in tmobile HD2, I am shocked.
When I copy a 720MB movie the write speed is about 4MByte/sec.
h2testw program when used on hd2 connected to PC, showed write speed as 4.8 MByte/sec only.
It needs to be noted the same card when tested with h2testw and a card reader gave 14MByte/sec but gives less than 4.5MB/sec on HD2.
How to fix this problem of HD2 microsd card speed!
Looks like HD2 usb controller has some problem.
the card is indeed class-10.
Please let me know a solution to this problem on HD2.
Click to expand...
Click to collapse
The HD2 doesn't read or write to sd cards at that high of speed... that's why it's pointless using class 6 or 10 cards in a HD2. I think most phones are like that. Class 6 and 10 cards are mainly used for digital cameras, where having high sequential write speeds matters.

zarathustrax said:
The HD2 doesn't read or write to sd cards at that high of speed... that's why it's pointless using class 6 or 10 cards in a HD2. I think most phones are like that. Class 6 and 10 cards are mainly used for digital cameras, where having high sequential write speeds matters.
Click to expand...
Click to collapse
I have earlier used a nokia 5800 xpressmusic phone with a class 6 16GB card.
The data transfer speeds were higher than HD2.
Generalizing from a single instance (HD2 scenario) may not be correct.

I'm going to go with that the HD2 does not transfer faster than 5.3 MB/sec between the PC and the phone regardless of what the internal transfer rate between the phone and card is.
Using a class 6 card myself, i have noticed that the phone is much more responsive than it was with the class 2 card in there and movies play without stuttering from the class 6 card and applications launch quicker.
my nokia n81 8gb did 8MB/sec from internal 8GB and so did my KM900. The KM900 did 6.2MB from the same classs 6 card

I was under the impression the HD2 maxed at 16 gig. Maybe that's the problem?

Like zarathustrax said, the HD2 isn't capable of read/write any higher than a class 4 card. I think somewhere on the EVO forum there's a fix to unlock the read/write capability for a higher speed but I dunno if anyone here has tried the fix, or if it even works for the HD2 at all.

anhyeuemmaimai said:
I'm going to go with that the HD2 does not transfer faster than 5.3 MB/sec between the PC and the phone regardless of what the internal transfer rate between the phone and card is.
Click to expand...
Click to collapse
This is not true. I've copied large files at over 10MB/s directly to the phone. I can't vouch for every hd2 though as it's quite possible they have different hardware. Also the speed drops dramatically if you're copying many smaller files.

I am thinking to buy memorette 32 gb microsd class 10 for my HD2.
As far as I have understood:
1) No matther what I cannot use it fully Class 10 speed when connected to HD2
2) When I connect it to my PC with card reader I can fully use class 10 speed.
I have sandial 8 gb class 2. When I connect it to my pc with card reader and transfering large amount of data (150+ MB), it cease to operate. I have to reconnect it. Then I shuld transfer in less amount of data or reduce copy speed (such as UltraCopy) . I think that is a safety issue for preventing disk from get burned. My question is, will I possibly have some issues with memorette or some other class 10 cards?
Also would it not better using class 10 card in HD2 for using on SD installed Operating System instead of class 6 or 4?
I would appriciate if someone return about memorette. I have never heard about that trademark. I am planning to bid on ebay today.
Sent from my HTC HD2 using XDA App

lude219 said:
Like zarathustrax said, the HD2 isn't capable of read/write any higher than a class 4 card. I think somewhere on the EVO forum there's a fix to unlock the read/write capability for a higher speed but I dunno if anyone here has tried the fix, or if it even works for the HD2 at all.
Click to expand...
Click to collapse
fix to unlock the read/write capability for a higher speed ????? Really ... i have buy a micro sd 16GB class 10 ........

morfil said:
I am thinking to buy memorette 32 gb microsd class 10 for my HD2.
As far as I have understood:
1) No matther what I cannot use it fully Class 10 speed when connected to HD2
2) When I connect it to my PC with card reader I can fully use class 10 speed.
I have sandial 8 gb class 2. When I connect it to my pc with card reader and transfering large amount of data (150+ MB), it cease to operate. I have to reconnect it. Then I shuld transfer in less amount of data or reduce copy speed (such as UltraCopy) . I think that is a safety issue for preventing disk from get burned. My question is, will I possibly have some issues with memorette or some other class 10 cards?
Also would it not better using class 10 card in HD2 for using on SD installed Operating System instead of class 6 or 4?
I would appriciate if someone return about memorette. I have never heard about that trademark. I am planning to bid on ebay today.
Sent from my HTC HD2 using XDA App
Click to expand...
Click to collapse
A good quality class 2 or 4 sd card is usually better for running an operating system off of, as lower class cards tend to have faster random access speed and better random read/write speeds. Class 6 and 10 sd cards are designed to have a higher sequential write speed, but to achieve these higher speeds, the card initializes the part of the card that's about to be used. The initialization takes some extra time to get started, but boosts the sequential write/read speed so it's great for digital cameras or writing files sequentially.
But when it comes to using the card to run an OS off of, like android or wp7, or using the card to run apps off of, you are going to be reading and writing many small bits of data from different parts of the card. When it comes to this, you need a card that has a good random access speed and random read/write speeds. A high class card that is tweaked to have high sequential read/write speeds ends up being slower because it keeps initializing each part of the card before accessing it, while the lower class 2 or 4 card that doesn't do the initialization is a lot quicker accessing many small parts of the card because it doesn't have that extra step... but they don't get the speed boosts with sequential read/write.
Many people just assume that a higher class card is always going to be better, but this isn't true at all. It all depends on what you are using the card for. Higher class 6 or 10 cards are perfect for digital cameras, recording video, or transferring large files, etc... if you are going to be doing sequential reading or writing, higher class is better.
But for running apps off of, or running an OS off of, or using it as internal memory for an OS like wp7, or anything that will be accessing many parts of the card quickly or reading many small bits of data, etc., you want a card with a good random access speed and random read/write speeds, and that is something that is not rated on cards... but generally lower class cards are better than higher class cards... especially if you get a good quality brand, like sandisk. Sandisk class 2 and 4 are very good cards for random access speeds.
I hope some of you find this info useful and stop assuming a higher class card means better for all situations.

buzz killington said:
This is not true. I've copied large files at over 10MB/s directly to the phone. I can't vouch for every hd2 though as it's quite possible they have different hardware. Also the speed drops dramatically if you're copying many smaller files.
Click to expand...
Click to collapse
You must be special then. In my tests I had no difference in a class 2 and class 6.

morfil said:
I am thinking to buy memorette 32 gb microsd class 10 for my HD2.
As far as I have understood:
1) No matther what I cannot use it fully Class 10 speed when connected to HD2
2) When I connect it to my PC with card reader I can fully use class 10 speed.
I have sandial 8 gb class 2. When I connect it to my pc with card reader and transfering large amount of data (150+ MB), it cease to operate. I have to reconnect it. Then I shuld transfer in less amount of data or reduce copy speed (such as UltraCopy) . I think that is a safety issue for preventing disk from get burned. My question is, will I possibly have some issues with memorette or some other class 10 cards?
Also would it not better using class 10 card in HD2 for using on SD installed Operating System instead of class 6 or 4?
I would appriciate if someone return about memorette. I have never heard about that trademark. I am planning to bid on ebay today.
Sent from my HTC HD2 using XDA App
Click to expand...
Click to collapse
I am using memorette class 10 32GB microsd currently.
Its affordable and is fully working. I have tested to full capacity read/write using h2testw as I wrote in an earlier post.
Just check the seller's feedback and the description though.

I use TEAM micro sd class 10 on my hero,but after a month my sd card write speed is only 2MB/s.
At the first time,it reach 11MB/s when i tested it with h2testw and sd speed test on my handset.
I only use 640MB for app2sd (ext2) without swap cache.
Could someone explain to me what was happen to my sd card?
Sorry for my bad English

[Q] Is microSDHC Class 10 compatible with HTC HD2?

I ordered a ADATA 8GB MicroSDHC Class 10 memory card for my HTC HD2. I'd like to know if it will work well on my phone since the transfer is so high. I'm asking this because I want to use a SD version on android.
Thank you in advance for the answer!

When i asked my friend who was the Sales Director of Sandisk Australiasia, he said that the read and write speeds of the supplied Class 2 was more than enough, since these Class 2 is the minimum guaranteed write speeds for that card.
Personally, i'd like to use a faster card, but i think that the key here is the quality of the card over the speed. Im using android over SD and dont mind the negligible lag.
Perhaps someone who has tried a faster card can comment on Droid on SD, as NAND speed offers the fastest, but without the flexibility.

GLO said:
When i asked my friend who was the Sales Director of Sandisk Australiasia, he said that the read and write speeds of the supplied Class 2 was more than enough, since these Class 2 is the minimum guaranteed write speeds for that card.
Personally, i'd like to use a faster card, but i think that the key here is the quality of the card over the speed. Im using android over SD and dont mind the negligible lag.
Perhaps someone who has tried a faster card can comment on Droid on SD, as NAND speed offers the fastest, but without the flexibility.
Click to expand...
Click to collapse
I found a really old thread where people were saying it is fully supported. Thanks for the answer! I want to use android on the sd too because I don't really want to risk messing up my phone with a rom install.

It's been around for ages that the speed of the SD doesn't matter for SD android.
what matters is the access time, here's a thread for benchmarks:
http://forum.xda-developers.com/showthread.php?t=1048649
the smaller the access time the better. in other words, you might get a class 10 card with long access time, and a class 2 with short access time, the class 2 will perform better overall (faster system loading, etc). but when you copy large files the class 10 will be faster.
meaning: for running android on SD you need a faster access time, and each millisecond counts.
[edit] forgot to say that random read and write speeds play a good role as well.

I use PNY 32GB class 10 MicroSD card in my HD2. No problem at all. Phone is only one week old and haven't installed any cooked ROM yet so 32GB card on stock ROM.

yes, a class 10 would work perfect with stock or custom windows ROMs. and with NAND android to some point.
I'm talking about SD android which, in case you haven't read the previous posts, he wants to run a build on his SD. and that's where the class 10 cards start to look bad. they mostly have slower random read/write speeds. In usage terms that's: lags, lags, errors, and more lags.

[Q] Do you prefer Android NativeSD or Nand with DataOnExt boot or NAND boot?

Which Option Do you prefere ?
NAND
[email protected], [email protected], [email protected]
For T-Mobile USA HD2 (LEO 1024)
Please visit my ICS NAND thread for the installation steps.
NAND with DataOnEXT
[email protected], [email protected], [email protected]
For EU/International HD2 (LEO 512)
Please create a FAT32 primary partition with 32KB cluster size, then an EXT4 primary partition with default cluster size on your SD card.
Please visit DataOnEXT thread for more info.
(I modified DataOnEXT to be able to use with NativeSD at the same time. Share the same data.)
NativeSD (SD-EXT)
[email protected], [email protected], [email protected]
For high speed read/write SD Card only (Class 6 or 10). Otherwise you may get poor performance.
Please create a FAT32 primary partition with 32KB cluster size, then an EXT4 primary partition with default cluster size on your SD card.
Please visit NativeSD thread for more info.

I use NativeSD (SD-EXT), since i have a strong suspicion the NAND memory of my HD2 is corrupt.
I have a class 10 SD and installed Nexus Jellybean. The ROM is running very slow, starting an app (i.e. Facebook) can take up to 1 minute.

Prefer DataOnEXT since my microSDHC card is Class 6. My tests showed that reading from card tends to be faster than Nand, but writing is slower. Also I believe power consumption is lower when working with Nand as opposed to SD, though I haven't looked into this or did any tests to check if this is the case. I allocated all nand memory to /system and would move some of my apps there with the rest being on SDHC. Otherwise this nand memory is left out to be good for nothing.

jvzijp said:
I have a class 10 SD and installed Nexus Jellybean. The ROM is running very slow, starting an app (i.e. Facebook) can take up to 1 minute.
Click to expand...
Click to collapse
Because class 10 cards have rubbish random write speed, so arent great for running roms. I have a class 4 that is several orders faster than my class 10 at random r/w and it really shows,, the class 4 out performs the class 10 at nativesd by a lot. Class10,, juddery, lockups, long waits,,, class 4 smooth as silk.

I use NativeSD.Although my card is class4 I think is faster than the nand.
I expect next week card class10.

samsamuel said:
Because class 10 cards have rubbish random write speed, so arent great for running roms. I have a class 4 that is several orders faster than my class 10 at random r/w and it really shows,, the class 4 out performs the class 10 at nativesd by a lot. Class10,, juddery, lockups, long waits,,, class 4 smooth as silk.
Click to expand...
Click to collapse
I just installed on a Class 4 and you are absolutely right! It is fast!
menioseten said:
I use NativeSD.Although my card is class4 I think is faster than the nand.
I expect next week card class10.
Click to expand...
Click to collapse
Don't install on a Class 10, that is rubbish!

On a Class 10 it is really faster than class 4
class 10 ----> 10 mb read speed
class 4 ---> 4 mb read speed
but this is my opinion for me it is faster

I use NAND with DATA on EXT, 16Gb class 10 micr SD.
It works very smoothly and save battery consumption.

I think NativeSD is the best solution, because no problems with free space and bad blocks, even on a class4.

yozgatdeluxee said:
On a Class 10 it is really faster than class 4
class 10 ----> 10 mb read speed
class 4 ---> 4 mb read speed
but this is my opinion for me it is faster
Click to expand...
Click to collapse
thats sequential read/write, , , not random read write.
example, see the two tables of results, post 1, here (a little old, but shows the point)
http://forum.xda-developers.com/showthread.php?t=1150369
for the direct read write, of course class 10 blows the others out of the water, but look at the random read write results, , a class 2 card wins! the first class 10 card doesn't appear till 16th on the list.
class 10 is great for recording video, large files, but rubbish for random small read/writes. The designers trade off random access in favour of sequential access.
A tricked up hot rod is way faster than a fiat punto in a straight line, but a punto would get around london city center way faster than a hot rod.
There ARE fast class 10 cards out there, but they're not as fast as you think for use as nativeSD cards.

I'm fairly sure that some SD cards also aren't compatible with MAGLDR. I just installed PACman to see what's so good about it (some things are vastly improved over NexusHD2 but in terms of certain apparently minor actions such as opening the notifications tray it seems oddly laggy) and when I tried the NativeSD method it was taking ages. The ROM was installing, but so slowly that it probably would have taken over half an hour to complete, so I pulled the battery and switched to a NAND install and everything went smoothly. Normal SD builds also don't work with my Kingston 16GB Class 4 :/

I earlier had SanDisk class 4 sd card.... ran faster than nand... Now on the SanDisk new ultra sd card with 30mbps Write speed. .. The rom is even slightly faster than on class 4
handwritten from my note 2 (N7100)

Nigeldg said:
so slowly that it probably would have taken over half an hour to complete,
Click to expand...
Click to collapse
did you choose odexed? because that takes a long time to complete, compared to deodexed.
you're right though, there are many reports about certain cards not playing nice with magldr/hd2 in general.

samsamuel said:
did you choose odexed? because that takes a long time to complete, compared to deodexed.
you're right though, there are many reports about certain cards not playing nice with magldr/hd2 in general.
Click to expand...
Click to collapse
Nah I left it as deodexed, I saw the progress in the bottom and it was saying 'extracting xxxx.apk' and for each .apk it was taking about 30-40 seconds. When I did it flashing on NAND it was fast enough that at the very least I couldn't read what it was saying there.

jvzijp said:
I use NativeSD (SD-EXT), since i have a strong suspicion the NAND memory of my HD2 is corrupt.
I have a class 10 SD and installed Nexus Jellybean. The ROM is running very slow, starting an app (i.e. Facebook) can take up to 1 minute.
Click to expand...
Click to collapse
me too
any apps are very slow... after installation of +40 apps , the ROM has various lags
---------- Post added at 12:58 AM ---------- Previous post was at 12:57 AM ----------
samsamuel said:
Because class 10 cards have rubbish random write speed, so arent great for running roms. I have a class 4 that is several orders faster than my class 10 at random r/w and it really shows,, the class 4 out performs the class 10 at nativesd by a lot. Class10,, juddery, lockups, long waits,,, class 4 smooth as silk.
Click to expand...
Click to collapse
explain better that concept
the NAtiveSD developpers know that particular ?

I use everything on NAND, because I often change my SD
Sent from my NexusHD2 using xda app-developers app

mirage-19 said:
I use everything on NAND, because I often change my SD
Sent from my NexusHD2 using xda app-developers app
Click to expand...
Click to collapse
hd2EU has little memory nand so it is best nativesd good with 1 sd card

Which SD-Card NativeSD
Hey
finally a thread where I think my question is in the right place:
Which SD-Cards could you advice me to use for NativeSD?
I bought a Transcend 16gb Class 10 and I really don't recommend that. It's laggy and slow-loading and has no advantage to my 2gb Class 4 Sandisk, except the additional 14gb storage.
The descriptions in the different Native-SD-ROM threads make me feel awkward all the time. They always say something like "very fast" or "smooth", but I don't experience that.
So I started looking for a thread with SD-Card experiences and recommendations for native-sd, but didn't find any.
If you could share a link or your favourite SD-Card I would be very happy!
Regards

rubb3ld1ek4tz said:
Hey
finally a thread where I think my question is in the right place:
Which SD-Cards could you advice me to use for NativeSD?
I bought a Transcend 16gb Class 10 and I really don't recommend that. It's laggy and slow-loading and has no advantage to my 2gb Class 4 Sandisk, except the additional 14gb storage.
The descriptions in the different Native-SD-ROM threads make me feel awkward all the time. They always say something like "very fast" or "smooth", but I don't experience that.
So I started looking for a thread with SD-Card experiences and recommendations for native-sd, but didn't find any.
If you could share a link or your favourite SD-Card I would be very happy!
Regards
Click to expand...
Click to collapse
Samsung or Sandisk 16 GB Class 10 best card´s ever

microSD Experiments - not very scientific
yozgatdeluxee said:
Samsung or Sandisk 16 GB Class 10 best card´s ever
Click to expand...
Click to collapse
Hi - I felt I had to enter this thread having experienced problems on NativeSD. I've been running tytungs JB on NativeSD for a couple of weeks. I have it on a Verbatim Class 10 8Gb - and there is frequent lag when opening apps. I also get odd FC's and Wifi crashes. I had put this down to the JB ROM pushing the HD2 beyond its performance threshold.
After reading this thread I have tried a new Verbatim Class 10 with tytungs GB3.3a on NativeSD. I have a direct comparison here - I also have the same ROM on my HD2 NAND. The ROM runs sweetly on NAND, but experiences some lag (mainly opening apps) on NativeSD. I will try a Class 4 Sandisk next week to check the difference.
Initially, it looks like the choice of microSD card is critical.

memory card help

I have a micro sd 2gb card , its class 4. And i have problems when i install some roms with data on ext, and similar.. so i will buy a new one.
i need an advice from you.. Which card should i buy so i can get that my hd2 works normally with rom with data on ext ( i mean that the partition sd card to be the main memory for all that stuff on phone) ?
Which class and size?
thanks

enco93 said:
I have a micro sd 2gb card , its class 4. And i have problems when i install some roms with data on ext, and similar.. so i will buy a new one.
i need an advice from you.. Which card should i buy so i can get that my hd2 works normally with rom with data on ext ( i mean that the partition sd card to be the main memory for all that stuff on phone) ?
Which class and size?
thanks
Click to expand...
Click to collapse
Size depends on your usage, you'll have to judge for yourself. I personally would stick to class 2 or 4, they perform as well if not better than class 10 cards for running SD Android, class 10s are only really good for large file transfers. Far more important than class is brand from what I've seen. SanDisk and other branded cards perform much better than unbranded cards (although this obviously comes at a higher price too).

I'd be very grateful if you could explain the contrary between this:
Nigeldg said:
I personally would stick to class 2 or 4, they perform as well if not better than class 10 cards for running SD Android, class 10s are only really good for large file transfers.
Click to expand...
Click to collapse
and this:
NativeSD (SD-EXT)
*For high speed read/write SD Card only (Class 6 or 10). Otherwise you may get poor performance.
Click to expand...
Click to collapse
^Quote is from tytung ICS rom thread.
Is the difference in NativeSD and usual SD roms?
Thanks.

Nigeldg said:
Size depends on your usage, you'll have to judge for yourself. I personally would stick to class 2 or 4, they perform as well if not better than class 10 cards for running SD Android, class 10s are only really good for large file transfers. Far more important than class is brand from what I've seen. SanDisk and other branded cards perform much better than unbranded cards (although this obviously comes at a higher price too).
Click to expand...
Click to collapse
I don't have class 2 micro sd card. Comparing class 4 G.skill and class 10 Sandisk on HD2 they are almost the same write speed to 5MB/s-7MB/s. but testing on PC, the class 10 is faster can reach 10MB/s write.

... but as we all know by now, the raw write speed of the card is no indicator of how well it will perform, since most files accessed are in the 4k filesize range, and many class 10 cards have TERRIBLE 4k block size read/write speed, whilst lower class cards ( 8, 6, 4) usually have better 4k random read/write speed.

samsamuel said:
... but as we all know by now, the raw write speed of the card is no indicator of how well it will perform, since most files accessed are in the 4k filesize range, and many class 10 cards have TERRIBLE 4k block size read/write speed, whilst lower class cards ( 8, 6, 4) usually have better 4k random read/write speed.
Click to expand...
Click to collapse
Thank you. I need more reading then.

Marvlesz said:
Thank you. I need more reading then.
Click to expand...
Click to collapse
Basically what samsamuel said. If you have the time, you could also read this thread from ny_limited, which explains a lot about SDs. It's in the Android general though so I don't know if it'll have anything about specifically running an OS from the SD card. Either way, he's very adamant on the NexusHD2 thread that class doesn't necessarily matter.