[linux-lvm] Unable to mount snapshot
Heinz J . Mauelshagen
mauelshagen at sistina.com
Fri Dec 19 04:10:02 UTC 2003
On Thu, Dec 18, 2003 at 12:06:11PM -0600, Little, Chris wrote:
> don't use snapshot. it sucks and the owners won't answer questions about
> it.
Chris,
what in particular problems do you have with snapshots ?
Regards,
Heinz -- The LVM Guy --
>
> > -----Original Message-----
> > From: John Craig [mailto:johncraig01 at netscape.net]
> > Sent: Thursday, December 18, 2003 11:34 AM
> > To: linux-lvm at sistina.com
> > Subject: [linux-lvm] Unable to mount snapshot
> >
> >
> > Hi,
> >
> > I successfully created a snapshot of an active LV with XFS
> > filesystem,
> > and ldisplay shows it to be operating correctly. However,
> > when I try to
> > mount the snapshot, it says "wrong fs type, bad option, bad
> > superblock
> > on /dev/system/snap or too many mounted file systems"
> >
> > Can anyone help, or shed some light on why this is happening?
> > Is there a
> > workaround?
> >
> > The mount command was "mount -t xfs -o ro /dev/system/snap /mnt/snap"
> >
> > I am running SuSE 9.0 on x86-64, with kernel 2.4.21-149, lvm version
> > 1.0.7(mp-v6). I have a volume group running on 3 raid arrays,
> > each 0.9
> > TB, for a total of 2.7 TB. It has 2 active LVs, one of them 2 TB, and
> > the other 500GB, leaving about 249GB unallocated. I created
> > the snapshot
> > with:
> >
> > lvcreate -L 200G -s -n snap /dev/system/adsdata
> >
> > As I said, the snapshot seems to be working correctly, but
> > when I bring
> > up the LVM tool in YAST, it shows the original LV, with
> > capacity 1.9 TB,
> > mounted, and the snapshot with a capacity of 1.9TB,
> > unmounted. When I
> > try to set the mount point for the snapshot, it says the capacity is
> > wrong, it needs to be <= 249GB. In other words, it seems to
> > be treating
> > it as if it were a regular LV, not a snapshot..
> >
> > The listing of lvdisplay is:
> > --- Logical volume ---
> > LV Name /dev/system/snap
> > VG Name system
> > LV Write Access read only
> > LV snapshot status active destination for /dev/system/adsdata
> > LV Status available
> > LV # 3
> > # open 0
> > LV Size 2 TB
> > Current LE 16383
> > Allocated LE 16383
> > snapshot chunk size 64 KB
> > Allocated to snapshot 16.66% [33.29 GB/199.90 GB]
> > Allocated to COW-table 100 MB
> > Allocation next free
> > Read ahead sectors 1024
> > Block device 58:2
> >
> >
> >
> >
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm at sistina.com
> > http://lists.sistina.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
> >
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm at sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
*** Software bugs are stupid.
Nevertheless it needs not so stupid people to solve them ***
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Heinz Mauelshagen Sistina Software Inc.
Senior Consultant/Developer Am Sonnenhang 11
56242 Marienrachdorf
Germany
Mauelshagen at Sistina.com +49 2626 141200
FAX 924446
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