[linux-lvm] lv not persistent across reboot?
Heinz J. Mauelshagen
Heinz.Mauelshagen at t-online.de
Wed Sep 27 14:47:14 UTC 2000
Morning Steve :-{)
On Wed, Sep 27, 2000 at 07:19:14AM -0500, Steve Brueggeman wrote:
> Does this imply that Linux LVM will also have problems with discs in H.A.
> configurations?
Yes.
>
> For example: Fibre Channel drives have two ports on them. If I have a Linux box
> with two Host Adapters, and each adapter is connected to the same set of drives,
> but on different ports, will v0.8final (without the patch below) have unstable
> vgscans?
Yes, it should.
>
> I have not been following the high availability mailing list, and a solution may
> already exist there. If so, and you know how, I'd be interested in a quick
> description.
Not that i am aware of.
Cheers,
Heinz
>
> Later,
>
> Steve Brueggeman
>
> On Tue, 26 Sep 2000 11:35:21 +0000, you wrote:
>
> >
> >Just recently i faced the efect with 2.4.0-test8, that devices where
> >exposed multiple times. For eg. /dev/sdb and /dev/sdf accessed the same drive.
> >
> >Sent a message to linux-kernel.
> >
> >Here's a temporary workaround for the LVM 0.8final library to deal
> >with this bug.
> >
> >
> >Please replace the loop block in tools/lib/pv_read_all_pv_of_vg.c
> >starting at line 84 by:
> >
> > for ( p = 0; pv_tmp != NULL && pv_tmp[p] != NULL; p++) {
> > if ( pv_check_consistency ( pv_tmp[p]) < 0) continue;
> >
> > /* avoid dual access pathes for now (2.4.0-test8) */
> > for ( i = 0; i < np; i++) {
> > if ( pv_tmp[i] == NULL) continue;
> > if ( strncmp ( pv_tmp[i]->vg_name, pv_tmp[p]->vg_name,
> > NAME_LEN) == 0 &&
> > pv_tmp[i]->pv_number == pv_tmp[p]->pv_number &&
> > strncmp ( pv_tmp[i]->pv_uuid, pv_tmp[p]->pv_uuid,
> > UUID_LEN) == 0) {
> > free ( pv_tmp[p]);
> > pv_tmp[p] = NULL;
> > goto pass_end;
> > }
> > }
> >
> > if ( strcmp ( pv_tmp[p]->vg_name, vg_name) == 0) {
> > if ( pv_number < pv_tmp[p]->pv_number)
> > pv_number = pv_tmp[p]->pv_number;
> > np++;
> > }
> >pass_end:
> > }
> >
> >
> >Gimme feedback if it works for you.
> >
> >Regards,
> >Heinz -- The LVM guy --
> >
> >On Mon, Sep 25, 2000 at 04:52:40PM -0700, Tim Pepper wrote:
> >> I've set up a little test machine to play with lvm. It's running RedHat 6.2
> >> with a 2.4-test8 kernel and lvm 0.8.
> >>
> >> I've successfully created and used an lv (with a reiserfs filesystem on top
> >> of it). My problem is that when I reboot the lv is gone. vgscan finds
> >> nothing. pvdisplay, lvdisplay and vgdisplay likewise show nothing. If I go
> >> through the steps though to recreate the lvm, pvcreate seems to think
> >> something's there and wants me to do a '-ff'. I can then continue on.
> >>
> >> Playing around I see:
> >>
> >> [root at qalab5 /root]# umount /mnt/nz
> >>
> >> [root at qalab5 /root]# lvdisplay /dev/netzero/big
> >> --- Logical volume ---
> >> LV Name /dev/netzero/big
> >> VG Name netzero
> >> LV Write Access read/write
> >> LV Status available
> >> LV # 1
> >> # open 0
> >> LV Size 34.18 GB
> >> Current LE 8750
> >> Allocated LE 8750
> >> Allocation next free
> >> Read ahead sectors 120
> >> Block device 58:0
> >>
> >> [root at qalab5 /root]# vgscan
> >> vgscan -- reading all physical volumes (this may take a while...)
> >> vgscan -- no volume groups found
> >>
> >> [root at qalab5 /root]# lvdisplay /dev/netzero/big
> >> lvdisplay -- ERROR: VGDA in kernel and lvmtab are NOT consistent; please run
> >> vgscan
> >>
> >> [root at qalab5 /root]# vgscan
> >> vgscan -- reading all physical volumes (this may take a while...)
> >> vgscan -- no volume groups found
> >>
> >> [root at qalab5 /root]# mount /mnt/nz
> >>
> >> I can't seem to display it, but it does remount here.
> >>
> >> I was thinking that maybe the 'vgchange -a n' shouldn't be done or perhaps I
> >> was doing it at the wrong time (at shutdown after the filesystem on the lv was
> >> umounted), but the above seems flakey even without vgchange in the picture.
> >>
> >> Any ideas what could be going on? Thanks in advance for any help.
> >>
> >> Tim
> >>
> >> --
> >> *********************************************************
> >> * tim.pepper at opensales dot com * Venimus, Vidimus, *
> >> * http://www.opensales.com * Dolavimus *
> >> *********************************************************
> >
> >=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> >
> >Heinz Mauelshagen Sistina Software Inc.
> >Senior Consultant/Developer Bartningstr. 12
> > 64289 Darmstadt
> > Germany
> >Mauelshagen at Sistina.com +49 6151 7103 86
> > FAX 7103 96
> >=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
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Heinz Mauelshagen Sistina Software Inc.
Senior Consultant/Developer Bartningstr. 12
64289 Darmstadt
Germany
Mauelshagen at Sistina.com +49 6151 7103 86
FAX 7103 96
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