[linux-lvm] Snapshots with Debian 2.4.26

Mark Komarinski mkomarinski at hms.harvard.edu
Thu Jul 1 13:23:23 UTC 2004

Mark Komarinski wrote:
> Right.  I'm off breaking all the rules here.  Here's what I have:
> Debian backport of 2.4.26 (only change was adding 64G support)
> Debian stable (1.0.4 it says)
> I want to use snapshots for backing up oracle, but here's what I have:
> cliff:~# lvcreate -l1 -s -n oracle_control_1_snap 
> /dev/vg00/oracle_control_1
> lvcreate -- INFO: using default snapshot chunk size of 64 KB for 
> "/dev/vg00/oracle_control_1_snap"
> lvcreate -- doing automatic backup of "vg00"
> lvcreate -- logical volume "/dev/vg00/oracle_control_1_snap" 
> successfully created
> cliff:~# mount /dev/vg00/oracle_control_1_snap /snapshot/oracle/
> mount: block device /dev/vg00/oracle_control_1_snap is write-protected, 
> mounting read-only
> mount: wrong fs type, bad option, bad superblock on 
> /dev/vg00/oracle_control_1_snap,
>        or too many mounted file systems
> cliff:~#
> (The size of the lv that I'm doing a snapshot of is 1 64M extent, so 
> doing a 1 extent in size should be enough, yes?)
> My understanding is that this is a result of the VFS patch not being 
> applied.  But there doesn't seem to be a VFS patch for 2.4.26.
> Any ideas?  I can provide whatever additional information you need, but 
> this is really strange.
> -Mark

I'll follow up to myself, as I found the problem.

I was able to find the 2.4.22 VFS patch which applied pretty cleanly 
(there was a DM patch, but since I'm not using it, there was nothing to 
apply).  Rebooted and it's working fine.


Mark Komarinski				mkomarinski at hms.harvard.edu
Sr. Linux/UNIX System Administrator	http://wqcg.med.harvard.edu
West Quad Computing Group
Harvard Medical School

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