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SubjectRe: strange mounting problem


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

AndreasMO-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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