[linux-lvm] need help to recover my system
Les Hazelton
seawolf at attglobal.net
Mon Oct 2 06:33:18 UTC 2000
Andreas,
Thanks. That got me one step closer. For some reason the patch I
clipped from your note would not apply even though it appeared to match
the existing source correctly. I applied it manually and re-compiled. At
this point, running vgchange will activate the volume group. When I list
the content of /proc/lvm it shows the 7 logical volumes i had defined.
All of the various display commands appear to work, but I can't mount
any of the logical volumes. The mount command says the special device
/dev/vg01/xxxx does not exist. I checked the LVM-HOWTO and the only
thing I see there is the requirement to make a filesystem on the new
logical volume. Is the mkreiserfs/mke2fs the place the special device is
created? If I do that it will destroy the existing data. It appears so
close to being recovered yet still so far away.
----------------------------
[root at farpt1 /root]# lvdisplay /dev/vg01/usr
--- Logical volume ---
LV Name /dev/vg01/usr
VG Name vg01
LV Write Access read/write
LV Status available
LV # 4
# open 0
LV Size 2.5 GB
Current LE 640
Allocated LE 640
Allocation next free
Read ahead sectors 120
Block device 58:3
----------------------------------------
[root at farpt1 /root]# mount -t reiserfs /dev/vg01/usr /vg01/usr
mount: special device /dev/vg01/usr does not exist
-----------------------------------------
[root at farpt1 /root]# ls -al /dev/vg01
total 104
dr-xr-xr-x 2 root root 4096 Oct 2 01:45 ./
drwxr-xr-x 12 root root 98304 Oct 2 02:09 ../
crw-r----- 1 root root 109, 0 Oct 2 01:45 group
Les Hazelton
Andreas Dilger wrote:
>
> You write:
> > When I booted the new 2.2.17 kernel I ran "pvscan -D" & "vgscan -D". I
> > can now do vgdisplay and lvmdisplay if I use the -D parameter. I just
> > can't activate the volume group. When I try, this is the result.
> >
> > [root at farpt1 /root]# vgchange -va y
> > vgchange -- locking logical volume manager
> > vgchange -- finding all volume group(s)
> > vgchange -- checking volume group name "vg01"
> > vgchange -- checking existence of volume group "vg01"
> > vgchange -- reading volume group data for "vg01" from lvmtab
> > vgchange -- checking volume group consistency of "vg01"
> > vgchange -- checking if all physical volumes of volume group "vg01" are
> > available
> > vgchange -- creating VGDA for "vg01" in kernel
> > vgchange -- can't open logical volume manager to activate volume group
> > "vg01"
>
> This looks like the same bug that YOSHIDA Daisuke just fixed (see message
> "Re: vgchange.c patch for devfs"):
>
> Cheers, Andreas
> -------------------------------------------------------------------------
> --- LVM/0.8final/tools/vgchange.c Tue Feb 22 11:09:33 2000
> +++ LVM.modified/0.8final/tools/vgchange.c Sun Oct 1 12:50:40 2000
> @@ -391,7 +391,13 @@
> if ( opt_v > 0) printf ( "%s -- creating VGDA for \"%s\" "
> "in kernel\n",
> cmd, vg_name);
> - if ( ( ret = vg_create ( vg_name, vg)) == 0)
> +
> + ret = vg_create( vg_name, vg);
> + if ( ret == -LVM_EVG_CREATE_REMOVE_OPEN) {
> + vg_create_dir_and_group( vg);
> + ret = vg_create ( vg_name, vg);
> + }
> + if ( ret == 0)
> printf ( "%s -- volume group \"%s\" successfully activated\n",
> cmd, vg_name);
> else {
>
> --
> Andreas Dilger \ "If a man ate a pound of pasta and a pound of antipasto,
> \ would they cancel out, leaving him still hungry?"
> http://www-mddsp.enel.ucalgary.ca/People/adilger/ -- Dogbert
--
Les Hazelton
---------------------------------------------
Good journey, longevity and prosperity to all
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