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From: Jan Ciger <jan.ciger@epfl.ch>
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Organization: EPFL
To: Oliver.Neukum@lrz.uni-muenchen.de
Subject: Re: umounting
Date: Tue, 22 Jan 2002 20:46:11 +0100
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On Tuesday 22 January 2002 20:01, you wrote:
> > When a second user comes and unmounts a disk, then the data are flushed
> > (the old data) and he gets a fs corruption, because the data were not
> > from his disk.
>
> No. The sbp2 driver should report a disk change. If such a thing happens,
> there's a kernel bug. Pulling out a mounted disk may cause a corrupted
> filesystem on that disk but not on others.

Maybe there is a problem in the driver, that it does not report the media 
change, but anyway, you WILL get a corrupted filesystem, when you unmount 
such disk with another media in drive - it is exactly like that - the driver 
didn't report the change and the filesystem layer thinks, that it has still 
the same media in drive and happily flushes e.g. ext2 data to a VFAT disk ... 
Then you get the corruption of the second disk. 

But I am not familiar with the sbp2 driver, but this is a quite standard 
behavior for removable media. 

Jan
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