What I found is:
when mounting the device with the fstab mountpoint, the mount command
takes the entry from there about fs. In my case ext2. So it doesn't
really check if it is so.
when mounting with /dev/sdc <mountpoint> mount takes 'hfs' for the
default fs entry. ?? Hfs_fs checks that there is NO hfs fs. So I imagine
that the original entry about my Aside is flushed.
A new mount with a cartridge in is the successful because the the
previous entry about the Aside is away.
As told by Andries, mount is not kernel related?. my mount has version 2.9o
So where do I ask or is this place still ok?
Thanks Andreas
--------------
Andreas Tobler wrote:
>
> Guest section DW wrote:
> >
>
> > Now I change the side of the cartridge and do the same again.
> > Doing so I get the WRONG content listed from Bside. The tree is still
> > the same as on the Aside.
> >
> > My question: why this behavior when working with fstab entries???
> >
> > There may well be a kernel bug somewhere here,
> > where perhaps check_media_change is not done right.
> >
> > On the other hand, the report is rather fuzzy.
> > The kernel does not know anything about fstab.
> > That is something the mount program looks at.
> > So, whether or not you use fstab ought not to make any difference.
> > You can check for yourself what happens by using strace on mount
> > so that you can see the system call that is actually executed.
> > For example
> > # strace -e mount mount /dev/hda11 /mnt
> > mount("/dev/hda11", "/mnt", "bfs", 0xc0ed0000, 0) = 0
> > #
>
> Ah, have to try it although never used strace before.
>
> attached you'll find the whole log including error messages.
>
> Thanks for the hint
>
> Andreas
>
> ------------------------------------------------------------------------
> MO-C1716T
> ---------
>
> kernel 2.2.13pre8
> platform LinuxPPC1999
>
> --------------------------------
> mount via /dev/sdc <mountpoint>:
> --------------------------------
> cartridge in A-side:
> --------------------
> mount /dev/sdc/ Aopto
> cd Aopto
> ls -> ASIDE
> cd ..
> umount /dev/sdc
> eject /dev/sdc
>
> cartridge out:
> --------------
> mount /dev/sdc Aopto
>
> pm7200 kernel: SCSI disk error : host 1 channel 0 id 5 lun 0 return code = 8000000
> pm7200 kernel: [valid=0] Info fld=0x0, Current sd08:20: sense key Not Ready
> pm7200 kernel: Additional sense indicates Medium not present
> pm7200 kernel: scsidisk I/O error: dev 08:20, sector 2
>
> umount /dev/sdc
>
> pm7200 kernel: SCSI disk error : host 1 channel 0 id 5 lun 0 return code = 8000000
> pm7200 kernel: [valid=0] Info fld=0x0, Current sd08:20: sense key Not Ready
> pm7200 kernel: Additional sense indicates Medium not present
> pm7200 kernel: scsidisk I/O error: dev 08:20, sector 2
>
> mount /dev/sdc/ Aopto
>
> pm7200 kernel: SCSI disk error : host 1 channel 0 id 5 lun 0 return code = 8000000
> pm7200 kernel: [valid=0] Info fld=0x0, Current sd08:20: sense key Not Ready
> pm7200 kernel: Additional sense indicates Medium not present
> pm7200 kernel: scsidisk I/O error: dev 08:20, sector 2
> pm7200 kernel: sd.c:Bad block number/count requestedscsidisk I/O error: dev 08:20, sector 2
> pm7200 kernel: hfs_fs: unable to read block 0x00000002 from dev 08:20
> pm7200 kernel: hfs_fs: Unable to read superblock
> pm7200 kernel: sd.c:Bad block number/count requestedscsidisk I/O error: dev 08:20, sector 0
> pm7200 kernel: hfs_fs: unable to read block 0x00000000 from dev 08:20
> pm7200 kernel: hfs_fs: Unable to read block 0.
>
> umount /dev/sdc
> umount: /dev/sdc: not found
>
> cartridge in B-side:
> --------------------
> mount /dev/sdc/ Bopto
> cd Bopto
> ls -> BSIDE
> cd ..
> umount /dev/sdc
> eject /dev/sdc
>
> cartridge out:
> --------------
> mount /dev/sdc Bopto
>
> pm7200 kernel: SCSI disk error : host 1 channel 0 id 5 lun 0 return code = 8000000
> pm7200 kernel: [valid=0] Info fld=0x0, Current sd08:20: sense key Not Ready
> pm7200 kernel: Additional sense indicates Medium not present
> pm7200 kernel: scsidisk I/O error: dev 08:20, sector 2
>
> umount /dev/sdc
>
> pm7200 kernel: SCSI disk error : host 1 channel 0 id 5 lun 0 return code = 8000000
> pm7200 kernel: [valid=0] Info fld=0x0, Current sd08:20: sense key Not Ready
> pm7200 kernel: Additional sense indicates Medium not present
> pm7200 kernel: scsidisk I/O error: dev 08:20, sector 2
>
> mount /dev/sdc/ Bopto
>
> pm7200 kernel: SCSI disk error : host 1 channel 0 id 5 lun 0 return code = 8000000
> pm7200 kernel: [valid=0] Info fld=0x0, Current sd08:20: sense key Not Ready
> pm7200 kernel: Additional sense indicates Medium not present
> pm7200 kernel: scsidisk I/O error: dev 08:20, sector 2
> pm7200 kernel: sd.c:Bad block number/count requestedscsidisk I/O error: dev 08:20, sector 2
> pm7200 kernel: hfs_fs: unable to read block 0x00000002 from dev 08:20
> pm7200 kernel: hfs_fs: Unable to read superblock
> pm7200 kernel: sd.c:Bad block number/count requestedscsidisk I/O error: dev 08:20, sector 0
> pm7200 kernel: hfs_fs: unable to read block 0x00000000 from dev 08:20
> pm7200 kernel: hfs_fs: Unable to read block 0.
>
> umount /dev/sdc
> umount: /dev/sdc: not found
>
> ----------------------------------------------
> the same sequence is done via the fstab entry:
> ----------------------------------------------
> /dev/sdc /mnt/Aopto ext2 noauto 0 0
>
> cartridge in A-side:
> --------------------
> mount /mnt/Aopto
> cd Aopto
> ls -> ASIDE
> cd ..
> umount /mnt/Aopto
> eject /mnt/Aopto
>
> cartridge out:
> --------------
> mount /mnt/Aopto
>
> pm7200 kernel: SCSI disk error : host 1 channel 0 id 5 lun 0 return code = 8000000
> pm7200 kernel: [valid=0] Info fld=0x0, Current sd08:20: sense key Not Ready
> pm7200 kernel: Additional sense indicates Medium not present
> pm7200 kernel: scsidisk I/O error: dev 08:20, sector 2
>
> umount /mnt/Aopto
>
> pm7200 kernel: SCSI disk error : host 1 channel 0 id 5 lun 0 return code = 8000000
> pm7200 kernel: [valid=0] Info fld=0x0, Current sd08:20: sense key Not Ready
> pm7200 kernel: Additional sense indicates Medium not present
> pm7200 kernel: scsidisk I/O error: dev 08:20, sector 2
>
> mount /mnt/Aopto
>
> pm7200 kernel: SCSI disk error : host 1 channel 0 id 5 lun 0 return code = 8000000
> pm7200 kernel: [valid=0] Info fld=0x0, Current sd08:20: sense key Not Ready
> pm7200 kernel: Additional sense indicates Medium not present
> pm7200 kernel: scsidisk I/O error: dev 08:20, sector 2
> pm7200 kernel: EXT2-fs: unable to read superblock
> mount: wrong fs type, bad option, bad superblock on /dev/sdc
> or too many mounted file systems
>
> unmount /mnt/Aopto
> umount: /mnt/Aopto/: not mounted
>
> cartridge in B-side:
> --------------------
> mount /mnt/Bopto
> cd Bopto
> ls -> ASIDE <---------WRONG it is physically BSIDE
> cd ..
> umount /mnt/Bopto
> eject /mnt/Bopto
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