[linux-lvm] LVM and sw RAID1
Nils Juergens
nils at muon.de
Thu Aug 24 19:00:20 UTC 2000
On Thu, 24.08.00, Peter Green <pcg at gospelcom.net> wrote:
>
> Could it be a LVM+RAIDn problem where n != 5?
>
I'm not sure. I just tried raid1 on my setup and was able to use
pvcreate without (obvious) problems...
-----------------------------------------------------------------------
sisko:~# pvcreate -v /dev/md1
pvcreate -- locking logical volume manager
pvcreate -- checking physical volume name "/dev/md1"
pvcreate -- getting physical volume size
pvcreate -- checking partition type
pvcreate -- creating new physical volume
pvcreate -- setting up physical volume for /dev/md1 with 79746048 sectors
pvcreate -- writing physical volume data to disk "/dev/md1"
pvcreate -- physical volume "/dev/md1" successfully created
pvcreate -- unlocking logical volume manager
-----------------------------------------------------------------------
but then i find lvm reports the wrong size on that pv, it actually
reports the size to be the same as on the other pv (/dev/md0)
------------------------------------------------------------------------
sisko:~# pvscan
pvscan -- reading all physical volumes (this may take a while...)
pvscan -- ACTIVE PV "/dev/md0" of VG "raidvolumes" [38.02 GB / 16.02 GB free]
pvscan -- inactive PV "/dev/md1" is in no VG [38.03 GB]
pvscan -- total: 2 [76.05 GB] / in use: 1 [38.03 GB] / in no VG: 1 [38.03 GB]
------------------------------------------------------------------------
/dev/md1 should be about 1.2 GB, not 38 GB.
I now remeber i also had troubles with vgchange which had to do with
vg_check_online_all_pv(). I applied a _very_dirty_ hack to get around the
problem (which i think only works because i just use raid-devices as
pv's so use at own risk :)) )
-----------------------------------------------------------------------
--- vgchange.c.orig Thu Aug 24 20:24:38 2000
+++ vgchange.c Thu Jul 27 20:48:09 2000
@@ -343,7 +343,7 @@
if ( opt_v > 0) printf ( "%s -- checking if all physical volumes "
"of volume group \"%s\" are available\n",
cmd, vg_name);
- if ( ( ret = vg_check_online_all_pv ( vg, &pv_offl,
+ if ( ! ( ret = vg_check_online_all_pv ( vg, &pv_offl,
&pv_incons)) < 0) {
if ( ret == -LVM_EPV_READ_PV_CREATE_NAME_FROM_KDEV_T) {
fprintf ( stderr, "%s -- ERROR: can't get name(s) of "
-----------------------------------------------------------------------
have fun,
Nils
--
> Nils Juergens | nils at muon.de | icq 7090774 <
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