How to check sd card file system

Question

I try to run file system check on my sd card. I opened adb shell and run the following command:

/system/bin $ fsck_msdos -f /mnt/extSdCard

I get the following error:

** /mnt/extSdCard (NO WRITE)
Invalid signature in boot block: 00002|shell@android:/system/bin 

I use Cyanogen mod 10.1 on Galaxy S2.

Any ideas?

Solution

As Chris Stratton suggested: Don't fsck the mount point, fsck the device itself As shoe rat said, I found the answer here: https://android.stackexchange.com/questions/38745/check-and-fix-sd-card-errors-within-android-itself

Comments

[Chris Stratton]

Don't fsck the mount point, fsck the device itself.

[ozbek]

You may need to unmount it first. See android.stackexchange.com/questions/38745/… and it looks like your question is an off topic :)