SanDisk 8GB Class 2 MicroSDHC too slow for U8230?

[Guest JimNu]

I had a SanDisk 8GB Class 2 MicroSDHC card in my Pulse before I flashed it with the U8230 ROM and everything worked fine, I then flashed it with U8230, with a 512KB EXT4 partition for apps (created using the system recovery console), but it was never totally stable. Whenever I shut the phone down using the 'Phone Options' (i.e. not a battery pull) I had to Repair SD:ext. This was fine as I kept the phone charged and very rarely shut it down.

Then when I was away on a break, and had left the phone on charge over night, when I looked at the phone it was stuck on the Android logo. I tried various repairs & wipes but couldn't recovery it. When I got back home I tried re-flashing and eventually got the phone back but couldn't install any apps no matter how often I re-partitioned or repaired SD:ext.

After reading around I found out how to manually re-partition using parted and then sdparted, but when I tried this on the 8GB card I got errors. I figure the card had become corrupted so I ordered a new one off Amazon and set up on a SanDisk 4GB Class 4 card I had lying around. This time I did the partitioning manually using sdparted and it returned with no errors. I then wiped & reflashed the device and everything works as I'd expect. I never have to repart SD:ext and it's very stable.

I've now got my SanDisk 8GB Class 2 card and, whilst I don't get errors from the sdparted, after the wipe & re-flash I get numerous FC errors and can't install any applications. The only real difference I can think of between the 4GB and the 8GB cards is that the former is Class 4 and the latter is Class 2.

Sorry for the long post, but I figured I'd better put as much info as possible in.

I suppose the actually question I'm asking is; is anybody else using a SanDisk 8GB Class 2 MicroSDHC successfully?

Edited February 26, 2010 by JimNu

[Guest Jan M]

the 2.6.27 kernel has a bug related to ext4...corrupting the filesystem on reboot

btw 8gb class 6 cards are available...I have one myself but got tired of the FC's so I don't use apps2sd.

Edited February 26, 2010 by Jan M

[Guest CHN-michael]

512KB？

I used Sandisk 4GB C2，It happend the same thing last night.

I got no more TF card,so I just used the TF cardreader to backup all to my PC. And then Flash the rom,and do the whole APP2SD again.It would be fdisk the TF card , and sloved my problem..

[Guest BigBearMDC]

I''m using a 16GB class 6 SD Card with 1GB ext3, and I have to repair the ext fs on every reboot. So I don't think this has only to do with the class of your card and the fs, but with other things too.

I tried adding the fs checkt to the MCR 1.7 boot.img, but i couldn't manage to get it working (but it tells me "filesystem check aborted" at startup, what means that recognizes it at least).

To go back to topic, maybe you just have a defect SD Card.

But I think you should at least use a class 4 card - I read somewhere that you need at least class 4.

Greetings,

BigBear