[linux-lvm] Unable to mount snapshot
Little, Chris
Chris.Little at okdhs.org
Fri Dec 19 09:18:01 UTC 2003
http://lists.sistina.com/pipermail/linux-lvm/2003-December/015359.html
http://lists.sistina.com/pipermail/linux-lvm/2003-November/015278.html
> -----Original Message-----
> From: Heinz J . Mauelshagen [mailto:mauelshagen at sistina.com]
> Sent: Friday, December 19, 2003 4:04 AM
> To: linux-lvm at sistina.com
> Subject: Re: [linux-lvm] Unable to mount snapshot
>
>
> 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
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> =-=-=-=-=-=-=-=-
>
> _______________________________________________
> linux-lvm mailing list
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
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