Re: memory card corrupted (MicroSD)
 

You can try using sfdisk to partition the card, but it's not the most user-friendly of fdisk programs (it's designed more for scriptability). You can dig out the manual pages online and give it a go though.

Re: memory card corrupted (MicroSD)
 

sfdisk: read error on /dev/mmcblk1 - cannot read sector 0
/dev/mmcblk1: unrecognized partition table type
No partitions found

this is what i get when i list all the partitions.
is it possible that the whole card reader isn't working right?
i'll try flashing back to the default kernel this afternoon

Re: memory card corrupted (MicroSD)
 

Flash the stock kernel back then try again. or even perform a full re-flash.
There is a remote possibility of hw damage caused by overclocking but it would be extremely rare.

Re: memory card corrupted (MicroSD)
 

Plug it into a PC and use gparted to create a new partition table.
If that doesn't work I'm guessing your card is dead.

Re: memory card corrupted (MicroSD)
 

i'll try that this afternoon.
but the card isn't dead, i tested it through my pc

Re: memory card corrupted (MicroSD)
 

Do you have any other microsd cards you can try? You said it works fine in everything except your N900...could be that your N900 has a problem.

Re: memory card corrupted (MicroSD)
 

i have the N900 for about 1 month, i've flashed the 900MHz firmware 3 days ago, i don't know if the memory card problems started before or after i flashed it.

i'll try to reflash it in a minute

edit:
i'm installing ubuntu in a VM, so it'll take more than a few minutes. but should i reflash everything? even the emmc?

Re: memory card corrupted (MicroSD)
 

The eMMC shouldn't affect the SD card at all, so I'd try just doing the firmware first. If that still doesn't work, then do both.

Re: memory card corrupted (MicroSD)
 

i've been trough a lot of trouble, and i finally did it.
i've had to flash the os and the emmc. but now my microsd card works again. thanks for all the help

Re: memory card corrupted (MicroSD)
 

Other than reflashing, did you also do the repartitioning?

I ask because DOS/Windows will happily and annoyingly transparently, use a partitionless block device (disk) as a drive, say E: or some other letter. You can find out, but it's not immediately obvious that it's not a partition on the SDcard.

Linux/bsd/etc can all do this but you tend to notice. The n900 is looking for /dev/mmcblk1p1 as a fat(32) partition. It won't try the whole device nor accept non fat.

So when you say the MicroSD worked, you might have seen it using /dev/mmcblk1 (or whatever terminology Windows uses to mean whole disk).