I'm wondering if there are known problems when partitioning 32GB (Class 10) microSD cards with multiple partitions?
I'm asking because I have the same problem with two 32GB cards from different vendors. I wanted to replace the 16GB Class 2 card I'm using in my HTC Desire for A2SD (M2SD to be exact) with a 32GB Class 10.
First I bought a Transcend 32GB Class 10 and partitioned it like
1. fat32 (30750MB)
2. ext3 (1000MB)
3. swap (250MB)
I had this setup running a few days when I noticed strange behaviour and sudden application crashes. In the output of dmesg I could see I/O errors when accessing the SD card. The SD card mount points where then mounted read-only (which caused the applications to crash).
I thought the card was broken and bought a new one (also 32GB Class 10) by SanDisk. I partitioned this card the same way as before and while copying backups from the first card onto the new one (on a PC) there were again I/O errors on the new card.
Either I have very bad luck or there are known problems when partitioning 32GB microSDs with multiple partitions? For the record I didn't have any problems with the old 16GB card (it had a fat32 and ext3 partition).
What's strange however is that when the 32GB card has only one fat32 partition (the default so to say) there were no errors when copying some dummy data onto it.
i don't know, but Swap degrade the SDcard.
Related
I have a Stock 16GB Nook Tablet running 1.4.0
My nook fails to boot from SD depending on the size of the first partition on the SD card. I have tried the following SD cards:
16GB microSDHC class 2 (two of them)
32GB microSDHC class 4
For example: I formatted the 16GB card using the nook tablet, and transfered the acclaim_update.zip to the root of the sd card. The nook would turn on but wouldn't load the update. However, I put a single partition on the 16GB card of just 300MB and it loaded the update and applied it.
It seems that when I have a small partition I can boot from the SD card to root the device but I want to be able to use all the space on the card. Perhaps I need to try a class 6 SD card?
Thanks for your time!
Have you verified the image that you're trying to use? Check the MD5 checksum against what's posted for that image.
So I purchased this Micro SDHC card when I was overseas thinking its a decent deal.
It was a Verbatim 16gb Class 10 (Verbatim 44010)
Long Story Short:
I had to format the card to exfat in order for my phone to write to it.
Using fat32, the phone can read the card just fine but can't write to it.
If I tried to format the card with the phone, I get the same problem (I guess the phone formats it to fat32?)
The card reads/writes fine in both formats when plugged into the pc
What do you guys think? Something is wrong with the card?
A its a question .
Probable faulty card .
jje
I9300 and 8GB SanDisk Class 10 SDHC
This is the version that is branded as ideal for Android that came with a Sandisk application for you to download.The card has been working fine for 1 month and then suddenly while my computer can read/write to it just fine....the S3 can only read the contents from it but can't write to it. It is originally formatted to FAT32, now my phone can't copy files to it (whatever file types) using the stock file app and the camera won't even save photos to it with an error that says "copy failed" or "can't save to storage".....Having seen this post being the closest to what I am experiencing, I am wondering if I should try exFAT too.....
I know there are numerous posts on this, however I could not find one that addressed my specific situation.
I have a rooted Lg G3 with stock rom and I am trying to use a class 10 SanDisk Extreme (16gb). The micro sd card read just fine on my computer with no problem at all with reading and writing data, however when I plug it in my phone I get a dialog that addresses the fact that a micro SD card. But when I check the storage setting I see that it has failed to mount.
To see if its a functionality problem on my phone i mounted a class 4 SanDisk micro SD with no error. I tried formatting the sd card through my computer to NTFS and FAT32 with 32 kb allocation size (quick format switched off) yet still no luck. Is it a possibility that LG G3 is not compatible with class 10 micro SD Cards?
Any help would be appreciated, and thanks for your time.
Just to update the information I posted above, but I tried mounting the SD card on my friend's Verizon Galaxy S5 and it ended up successfully being able to read and format it. Maybe it's my phone? If so is there anyway of fixing it or possibly modifying it?
It is possible that the handset cannot read/mount Class 10 cards, I've seen it mentioned in threads before about trouble with mounting SDCards, Class 10 seems to be the biggest problem I've seem mentioned.
Use the search for Class 10 on the forums and see if a solution is available
Sent from my B1-730HD using XDA Free mobile app
In the future I will buy a 128GB SD and will make a mod based on the "galaxy note 4 with 512GB storage." I'm just waiting to get my adapter purchase on Aliexpress.
questions:
I may have problems with Android MediaScanner?
The durability of the memory card can be affected by the huge amount of files that will be kept?
I had a SanDisk 64GB for a few months, on a night I downloaded some files, which in the end amounted to 20GB in the morning I could not transfer these files via MTP or an old adapter I have, then ziped files and sent to my PC. Shortly thereafter I formatted my SD and had the error dirty volume, and SD boot partitions were corrupted in accordance with the Hex Active Disk Editor.
This is my third or fourth SD, had two 32GB and 64GB only one. It's really boring to me swap memory card each semester.
Do you recommend using an SD card in FAT32 or exFAT to store a huge number of files?
Hi,
I have huge issues with my SDCard. Since I'm on CM13 and formated the SD as internal memory, the card becomes corrupted after a few weeks. My first card which was replaced suddenly caused the system to freeze and then it would not Boot while the card was inserted. Every attempt to reformatreformat in TWRP (which initially did not boot with inserted card too) or in Windows were unsuccessful so I assume the card was broken on a low level.
The new card shows similar signs after only a week (read only fs errors) but I was able to reformat in Android to the "normal" external Mode. I should mention that it is a 64GB Sdxc card. It the only difference between sdxc and sdhc is filesystem support right?
Does anyone have issues with internal memory mode?