Database Users

Smaller size sdcards work better then big sized sdcards (also known as high capacity)

OK so I've been running many version and builds of android since day one on my tmous hd2. At first it was with the stock 16gb sdcard, (till it got corrupted, LOL) so then I switch to a 2gb I had around. I have only formatted this 2gb card once in the begging and never again.many times I have deleted the android folder and many times I has switch to new builds ( I think I try everyones.latest I been using n very stable JDMS 1.3) n haven't had any issues. Like freezing or SOD. Now two days ago I help my friend with his and his wife's tmous hd2 with the 16gb card. So I did a fresh format fat32 then flash the same rom (ozDroid) and radio I been using for months. It results they are getting freezes and occasionally SOD. So for a test I took my wife's tmous hd2 with 16gb card did the hole setup an guess what the freezing and SOD is the more often..when I don't get any with my sdcard 2gb. Could there be an issue with high capacity cards. And could that be the reason why many tmous have the more problems with freezes and SOD
Sent from my HTC HD2 using XDA App

I use stock 16gb and dont have those issues.
Sent from my HTC HD2 using XDA App

this is common knowledge in the IT field. the larger the card, the more slowly it will write and access small files, such as the files needed to run android. take 100 small text files and copy them to a 256 thumb drive, and an 8 gb thumb drive. you can copy them all to the 256mb drive, and delete them all again, before the are all copied to the 8gb thumb drive. the 8 gb drive, will work much faster copying an .avi, or large file than the 256, but it sucks at lots of small files.
but it's good that you're posting your exp here. many people would not know this otherwise, and may stop experimenting with android due to frustration, when all they need is a $10 2gb card from walmart.
another couple tips when dealing with solidstate memory. just like a harddrive, files can become fragmented if you have multiple tasks or file transfers going at the same time. to avoid this, make sure each is done before starting another set of files. next, do not defrag solid state drives. they only have a limited amount of times they can read and write to each sector, and defragging, and excessive copying/deleting, wears down the material, and kills sectors of the drive. and last but not least, watch your battery. just as it says not to attempt an install with less than 50% battery, don't run your phone down to a dead battery when possible. because your booting of the microsd, it's constantly being accessed by read and write functions, and if the battery dies before it finishes writing, you get corrupted files, and you'll have to do your install all over.

No lockup or freeze with 16GB.

prking07 said:
I use stock 16gb and dont have those issues.
Sent from my HTC HD2 using XDA App
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Same here. 16 gb SDHC, no problems.

I haven't noticed any difference between a Class 2 2gb, Class 2 16gb, or a Class 4 8gb - they all run about the same with not noticeable differences in boot time, smoothness, or SODs, even though the class 4 is 2x as fast.

hi guys,
before you post any comment, you can grab a none SDHC card, and do a comparison.
if you have benchmark software, please look at the "access time", the None-SDHC card always faster than the SDHC card. not the speed, but the access time.
after I change to 2GB SD Card, I never meeting any sleep, lag program with any version of roms.
if you don't have none-SDHC card, please do not make any conclusion.

16 gb class 10 kingston sdhc
works great
compaired a class 6 no name 8gb sdhc and the stock 16gb class 2 the class six lags less than the class 2 but the class 10 16 gb kingston is super fast

I am using class 4 8GB and 16GB, no diffrence found.

I can confirm, going from 16gb to 8gb, I've had far less issues with the 8gb card using the same setup. 0 SODs when I'd get them daily with the 16gb card. May or may not have anything or everything to do with it, but I'm sticking with the 8gb card. lol

My experience has been that performance has been about the same whether using a 2 GB SD card or a 16 GB SDHC. However, it seems that my 16 GB card was slower at one point because I had an excessive number of individual files on it. It's a double edge sword because you have all that capacity but the more you use it the slower it seems to run.

I had this issue aswell but I updated my radio to 2.12.xx.xx. and since then I have not seen any performance issue due to the SD card size.
Sent from my HTC HD2 using XDA App

qingcai said:
hi guys,
before you post any comment, you can grab a none SDHC card, and do a comparison.
if you have benchmark software, please look at the "access time", the None-SDHC card always faster than the SDHC card. not the speed, but the access time.
after I change to 2GB SD Card, I never meeting any sleep, lag program with any version of roms.
if you don't have none-SDHC card, please do not make any conclusion.
Click to expand...
Click to collapse
That's very presumptuous of you.
I fixed all of my lag and screen freeze problems with a combination of setCPU settings, ADW launcher settings, and updating my radio rom.
Before I finished doing all of that this morning, I'd get a freeze from wake fairly often. Since then, not a single freeze, and trust me, I've been trying to get it to freeze up.
Believe what you will my friend, but punishing yourself with a 2GB card just seems silly when people are outright telling you that the size isn't the problem.
Good luck either way!

apallohadas said:
That's very presumptuous of you.
I fixed all of my lag and screen freeze problems with a combination of setCPU settings, ADW launcher settings, and updating my radio rom.
Before I finished doing all of that this morning, I'd get a freeze from wake fairly often. Since then, not a single freeze, and trust me, I've been trying to get it to freeze up.
Believe what you will my friend, but punishing yourself with a 2GB card just seems silly when people are outright telling you that the size isn't the problem.
Good luck either way!
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Click to collapse
Yes ur are right with the new builds and using setting and programs like setcpu or even auto killers will help eliminate this problems. But I I said in the first post was that high capacity cards tend to give u more problems, using my 2gb (I think all the way to 6gb is non high capacity) I have no need for such adjustments to whatever build I use..u can read post 2, is very well explain there.
Sent from my HTC HD2 using XDA App

My 32GB did worked only one time, after first reboot i cant use android. But 2gb works like a charm

Kingston 8GB Class 4

As some people reported this sd card will cause multiple lags and slow down market place and app installing, others are saying its working fine for them.
Does someone know about a workaround?

Well I have a Kingstone 16GB card and I can confirm I am experiencing some lags while browsing & listening to music, i'm unsure of the installing speed issue since everyone on WP7 experience slow sync and slow deployment of XAP files, but it is terribly slow.
thinking on getting a new one just for WP7...

just test it without sd card for some time, its such a big difference
the question is if it can be fixed in some way or if its necessary to buy a completly new sd card

i've spent last two nights with installing wp7 on my kingston 8gb class 4 and my sandisk 2gb (hd2-bulk) over and over... my result: the 8gb kingston card is so much slower... not to speak about the annoying lags in marketplaas as described above and the multiple reboots on startup (up to 8 times till it boots all the way through to homescreen!) now i'm forced to stay on 2gb until a solution is found, or someone will sponsor a compatible 8gb card (or larger) to me

malsehn said:
i've spent last two nights with installing wp7 on my kingston 8gb class 4 and my sandisk 2gb (hd2-bulk) over and over... my result: the 8gb kingston card is so much slower... not to speak about the annoying lags in marketplaas as described above and the multiple reboots on startup (up to 8 times till it boots all the way through to homescreen!) now i'm forced to stay on 2gb until a solution is found, or someone will sponsor a compatible 8gb card (or larger) to me
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At least the 2GB sandisk works for you, i got 2 of them and none are even recognized

Well I have 2 more cards
one is a generic 4GB i tested WP7 with which was great! but I didn't cofirm if the slowdowns occur after installing apps and adding music, I only synced about 10 songs before deciding to install WP7 on my kingston one, so I can't confirm that it was better, it just didn't lag, I can't know if the lag is an issue after loading things onto the SD card.
The one SD card I have is another Kingston 8 GB, same model like my 16GB, so it would be stupid to even try it since i've got everything configured for now on my 16GB.
I'm thinking about getting a Sandisk 16GB but i'm afraid i'll just throw money and this issues will appear again because they are size related...
The thing is, Does everyone experince slow downs when listenning to music? (which is the main thing I do with my phone) or that WP7 doesn't load apps sometimes? or when sometimes you swype left for the list and the icons of the applications that are insatlled on the SD card are still loading (grey image with a star).
Facebook is slow.
Because if this is the base performance for everyone i'll just stay with my Kingston.
It just seems that everything that's related to the SD card is working on and off.

The Kingston 4GB class 4 I have is very laggy, big difference with it out. I bought one of those SD cards that where approved as WP7 compatible by Sandisk.
My HD2 is in repair at the moment getting a new digitizer so I can't test it until it comes back.

tkato said:
Well I have 2 more cards
one is a generic 4GB i tested WP7 with which was great! but I didn't cofirm if the slowdowns occur after installing apps and adding music, I only synced about 10 songs before deciding to install WP7 on my kingston one, so I can't confirm that it was better, it just didn't lag, I can't know if the lag is an issue after loading things onto the SD card.
The one SD card I have is another Kingston 8 GB, same model like my 16GB, so it would be stupid to even try it since i've got everything configured for now on my 16GB.
I'm thinking about getting a Sandisk 16GB but i'm afraid i'll just throw money and this issues will appear again because they are size related...
The thing is, Does everyone experince slow downs when listenning to music? (which is the main thing I do with my phone) or that WP7 doesn't load apps sometimes? or when sometimes you swype left for the list and the icons of the applications that are insatlled on the SD card are still loading (grey image with a star).
Facebook is slow.
Because if this is the base performance for everyone i'll just stay with my Kingston.
It just seems that everything that's related to the SD card is working on and off.
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im experiencing the same, but as i said its probably related to the kingston sd card, its not the base performance
everything works awesomely fast without the sd card inserted...

Deploying applications takes ages, music in Zune stutters, games lag... It's clearly the bad performance of our Kingston...

I have 4 MicroSD :
sandisk 2gig class4
Sandisk 2gig class2
Kingston 4gig class2
Kingston 4gig class6
Sandisk 2gig class2 is the best.Class4 drain more battery and is more lag.

I have 2 MicroSD
kingston 16Go Class 2
kingston 8Go Class 4
16 c2 is perfect
8 c4 is lag and slowdown

Inersting but it seems all the laggy SD's are class 4, while class 2 works good, mine is a class 4 as well.

I have 2 MicroSD
Samsung 8GB Class 2 ( lag and slowdown )
Nokia 4GB Class 6 ( really fast and good battery )

I have a 16Gb Kingston class 4 and magldr doesn't even recognize it let alone wm7 I think its down to that, like the battery issues most are having, in time these will be fixed

I confirm, don't use Kingston class4 (I'll try to get a refund from amazon :/)
No problem with my sandisk class2

same here, 8GB class 4 Kingston doesn't even boot anything :-(

Yea I have a Kingston class 4 16gb that magldr doesn't even read, I have just put a post in the HD2 general about it asking about it
Sent from my duel booting beast of a phone

[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?
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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] why it takes long time to install apps

Any idea why it takes so long to install apps in wp7

I don´t have any complaints so far... it´s fast here.
Many slowdowns, however, seem to be caused by using sub-optimal, if not incompatible, SD cards.

Change the SD card!!!! I migrated from a Kingston Class 4 4GB (lag in WP7 + slow app install) to a 16 GB Adata Class 10 card and now everything is really flying high SanDisk cards should be your best bet as of compatibility. I switched to Adata because I got it as a present.

thanks for the reply guys
i am using sandisk 16 gb class 6, so you think i should change card or the is some other problem

It´s hard to tell from distance... if you´ve got another card, it might well be worth a try. Sandisk usually work, but then again, some don´t. I think that was also a major issue for HTC when they had to notice lags and malfunctions of some of their WP7 devices which use SD cards instead of soldered memory...

SD Card Partitions

I have a Nook Color that is rooted running CyanogenMod 7.1.0 on internal memory. I have a 16GB Class 10 SD Card in it and was wondering what people are using for partitions on their SD Cards. I have pushed pretty much every app over to SD Card but some (not all) applications (Google Maps for instance) seem really sluggish and many times it force closes.
Is the Nook just not powerful enough to run Google Maps or is there something I need to adjust? Maybe a bigger swap partition? I set them up quite a while ago and don't recall what I set them to off the top of my head.
Using CyanogenMod I am overclocked to 1.2GHz with the Governor set to Performance.
VM heap size set to 48MB.
Thanks

class 10 cards are not as good as you'd think for any Android device. Android devices tend to write smaller files... a class 4 card (Sandisk recommended) is actually best for these devices.

DizzyDen said:
class 10 cards are not as good as you'd think for any Android device. Android devices tend to write smaller files... a class 4 card (Sandisk recommended) is actually best for these devices.
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I am mainly using Class 10 as that is what I had laying around in the Micro SD Card Format.
I have a 32 GB Class 4 in my Thunderbolt and it is fine. Do you really think it would slow it down much if it is Class 10? I could always toss it in an adapter and use it in my Canon T3i.

This thread here explains what the issue is and will tell you how to test your cards out to see if they'll work. Basically that Class10 card only gets Class 10 speeds when transferring large files and for small files (like an OS/app uses to write temp files) you get crap speed. it's not normally noticed in everyday use because the files are small and a little delay writing it isn't noticed by the user. Class 4 cards from SanDisk seem to be overall performers for files of all sizes.
- Aerlock

Aerlock said:
This thread here explains what the issue is and will tell you how to test your cards out to see if they'll work. Basically that Class10 card only gets Class 10 speeds when transferring large files and for small files (like an OS/app uses to write temp files) you get crap speed. it's not normally noticed in everyday use because the files are small and a little delay writing it isn't noticed by the user. Class 4 cards from SanDisk seem to be overall performers for files of all sizes.
- Aerlock
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Hmm, that is interesting. Now does it matter that I am booting off internal memory? I am not dual booted and have CyanogenMod on internal memory. I am running Google Maps which is one of the programs that is really slow on internal memory. My guess is that what you are saying would apply because of the swap space being used on the SD card. I will say that my wife also has a Nook Color that I put my old 8GB Class 6 card from my old Nexus One in and hers seems to perform a little faster than mine. I haven't done the tweaks to VM heap size to hers that seems to have helped mine a little. So you may be on to something. I have a couple of these class 10 cards that I use on my Camera and have been happy with them. I think they are Samsung. The DSLR is 18MP so those files are pretty big so it might be just better to leave those cards for use there and get a couple of those SanDisk Class 4 cards for our Nooks.

Yeah, running apps from the sd would benefit from a fast sd card. When you get one, use CrystalDiskMark (pc) to check the 4k read/write speeds. I bought an 8gb and two 16gb Sandisk class 4 cards from Radio Shack that have reasonable speeds and work well. They're all in the .5 range for writes - not as good as some I've heard of, but they work well! Some (a Kingston and a knockoff Sandisk) I tested were as low as .006! I tried to use the Kingston before I tested its speed and got lots of instability and FCs. hth
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