can't mount Volume Group

[C M Reinehr]

On Mon 01 August 2011 10:36:09 am Tony Alfrey wrote:
> C M Reinehr wrote:
> > On Sun 31 July 2011 05:35:59 am Tony Alfrey wrote:
> >> Tony Alfrey wrote:
> >>> Tony Alfrey wrote:
> >>>> Hello;
> >>>> 
> >>>> System has 2 SATA drives.  I chainload the second from LILO on the
> >>>> first.  That works perfectly.
> >>>> 
> >>>> The second drive sdb has Fedora on it.
> >>>> sdb1 is a boot partition
> >>>> sdb2 is a Logical Volume
> >>>> 
> >>>> lvdisplay shows the Volume Group and the Logical Volumes,
> >>>> 
> >>>> 
> >>>> - - - - - - - - - - - - - - - - - - - - - - - - - - - - --
> >>>> 
> >>>> linux:~ # lvdisplay /dev/VolGroup00
> >>>> 
> >>>>   --- Logical volume ---
> >>>>   LV Name                /dev/VolGroup00/LogVol00
> >>>>   VG Name                VolGroup00
> >>>>   LV UUID                FSHbaz-XXgb-oaMy-9Jf2-rYnD-K4mg-AN5mXg
> >>>>   LV Write Access        read/write
> >>>>   LV Status              NOT available
> >>>>   LV Size                465.03 GB
> >>>>   Current LE             14881
> >>>>   Segments               1
> >>>>   Allocation             next free (default)
> >>>>   Read ahead sectors     0
> >>>>   
> >>>>   --- Logical volume ---
> >>>>   LV Name                /dev/VolGroup00/LogVol01
> >>>>   VG Name                VolGroup00
> >>>>   LV UUID                p93KII-5ZU6-PxoD-d0hs-soKg-7Tbc-R4raVf
> >>>>   LV Write Access        read/write
> >>>>   LV Status              NOT available
> >>>>   LV Size                512.00 MB
> >>>>   Current LE             16
> >>>>   Segments               1
> >>>>   Allocation             next free (default)
> >>>>   Read ahead sectors     0
> >>>> 
> >>>> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> >>>> 
> >>>> The first is Fedora and the second is swap.
> >>>> But I can't mount the volumes.
> >>>> I'm betting that
> >>>> 
> >>>> LV Status       NOT available
> >>>> 
> >>>> might be a clue.
> >>>> Does anyone know how to make it available without corrupting it?
> >>>> Remember, I can boot it (maybe I am booting the boot partition
> >>>> /dev/sdb1 and then somehow from there the volumes on sdb2 are
> >>>> mounted). Thanks!
> >>> 
> >>> In addition, when I boot Fedora (on sdb) and then run lvdisplay, then
> >>> LV Sataus is Available (I guess that would be obvious).
> >>> 
> >>> So any ideas on how to get the volumes Avaible would be appreciated.
> >>> 
> >>> Thanks!
> >> 
> >> Sorry for answering my post.
> >> And finally I see that maybe I can use
> >> 
> >> lvm  vgchange -al--available y /dev/VolGroup00/LogVol00
> >> 
> >> Can someone look at that and tell me if it looks right before I go and
> >> break this freaking thing?
> >> 
> >> Thanks
> > 
> > I think that all you'll need is:
> > 
> > #lvchange --available y VolGroup00/LogVol00
> > 
> > and
> > 
> > #lvchange --available y VolGroup00/LogVol01
> > 
> > At any rate, you're not going to break anything. :-)
> 
> Yes, thanks.  It seemed to like /dev/VolGroup00 and that made both
> volumes happy.

I don't do this often enough ever to remember all the exact details. I ran 
into this particular problem for the first time several years ago and each 
time, I pretty much have to work it out by trial and error until I discover 
just the right incantation. ;-)

cmr
-- 
Debian 'Lenny' - Registered Linux User #241964
--------
"More laws, less justice." -- Marcus Tullius Ciceroca, 42 BC