Volgroup00 not found

[Todd Denniston]

Timothy Murphy wrote, On 12/13/2008 10:37 AM:
> Braden McDaniel wrote:
> 
>>> I'm probably out of my depth,
>>> but what happens if you boot with Knoppix or some other Linux CD,
>>> and say "sudo vgchange -a y" ?
>> I don't have a live CD handy; but doing that from rescue mode didn't
>> seem to have any effect. Of course, by the time I'm in rescue mode,
>> the filesystems have been located and mounted under /mnt/sysimage. If
>> any of the logical volumes weren't marked as available, they wouldn't
>> be locatable during rescue, would they?
> 
> As I said, I'm not sure if I am talking sense,
> but my impression is that "vchange -a y" will tell you
> what LVM volumes can be found,
> and make "available" any that are not already available.
> 
> I found during a long saga preupgrading from F-9 to F-10 on a SCSI machine
> that for some reason my LVM partitions were not found at one point,
> and vgchange brought them to light.
> 
> Actually, I have had a few problems with LVM during system upgrades,
> and have reluctantly decided to withdraw from the LVM world.
> The advantages are greatly outweighed by the disadvantages, in my case.

If "vchange -a y" does not do it, IIRC I had to a "vgscan -v" and then 
"vchange -a y VOLNAME" that vgscan showed.

Unless a person is running a >1 PB monster drive or a system where they play 
about with VMs and new file systems, I have decided that the trouble in 
maintenance modes completely outweighs any benefit of LVM.

-- 
Todd Denniston
Crane Division, Naval Surface Warfare Center (NSWC Crane)
Harnessing the Power of Technology for the Warfighter