dosfsck (3.0.28) failes to repair (remove dirty bit) FAT32 on the JetFlash Transcend flash drive

[dosfstools]

dosfsck (3.0.28) failes to repair (remove dirty bit) FAT32 on the JetFlash Transcend flash drive

[andreasbombe]

I was going to say I verified that the dirty flag is cleared without problems, but of course there is the message about the FATs being too smal for the filesystem. dosfsck can't deal with that and it is a fatal error. That's why the cleared dirty bit never gets written.

It's not clear to me at first sight under which conditions this can happen and if dosfsck should be able to deal with this. I'll have to look into it.

[ssten]

…but of course there is the message about the FATs being too smal for the filesystem. dosfsck can't deal with that and it is a fatal error. That's why the cleared dirty bit never gets written.

In this case I expect dosfsck to check result of requested action and at least report, that it failed and an error happened.

It's not clear to me at first sight under which conditions this can happen and if dosfsck should be able to deal with this. I'll have to look into it.

Anyway if dosfsck should not deal with such error, I expect it suggest what to do to fix issue.
In this particular case I expect something like recommendation to re-initialise filesystem.

[Survolog]

Maybe need to fix the output message?

- 0x41: Dirty bit is set. Fs was not properly unmounted and some data may be corrupt.
+ 0x41: Dirty bit is set. Fs is currently mounted or fs was not properly unmounted and some data may be corrupt.