Re: 8.0-RC2 mangles msdosfs

Szilveszter Adam wrote:
> Well, this is of course only anecdotal, but I do not witness corruption
> with any of my USB-attached umass devices.

A friend tried to reproduce my problem to no avail, so it appears to
be a rare issue. But I also can produce the problems with with file
system backed md devices, so it's not a USB issue.

I've first run into it on RC1, so rebuilding is not a solution, either.

> (I no longer have a floppy
> drive, and I do not have a FAT partition on my HDD either, so I cannot
> test that). I am using 9.0-CURRENT, rev 198667 (but the problem did not
> show also on earlier revs) 
> 
> The devices that I use on and off:
> 
> - Meizu M3 Music Card audio player
> - Cowon iaudio D2 audio player (According to user forums, this one is
>   particularly sensitive to fs corruption)

I'm using a Cowon S9. When I added a couple of new songs to the
device, it complained about them to be corrupted (despite a proper
umount). So I ran fsck_msdosfs, which found quite a number of
problems and recopied the files.

After turning the device back on I only got random coloured garbage on
the screen, whenever I tried to access something.

I booted Windows and chkdsk reported all these problems (cross-linked
files and the like). But the player didn't recover until I reformatted
the whole mess.

> - various USB sticks, most notably a Kingston Data Traveller 4G (I
>   believe)
> - Even the occasional memory stick, or SD card in card reader
> 
> However, I must also state that I never used fsck_msdosfs in the last
> few years. Neither have I formatted any FAT file systems under FreeBSD for
> years. Also, I always unmount the devices before removing them.
> 

So do I. This didn't safe me, though.

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