On 3/8/2013 10:08 AM, SilverTip257 wrote: > On Fri, Mar 8, 2013 at 9:37 AM, Robert Moskowitz <rgm at htt-consult.com>wrote: > >> On 03/08/2013 09:21 AM, Harold Pritchett wrote: >>> On 3/8/2013 8:57 AM, Robert Moskowitz wrote: >>>> On 03/08/2013 08:07 AM, SilverTip257 wrote: >>>>> On Thu, Mar 7, 2013 at 10:54 PM, Harold Pritchett <harold at uga.edu> >> wrote: >>>>>> On 3/7/2013 10:10 PM, Stephen Harris wrote: >>>>>>> On Thu, Mar 07, 2013 at 09:54:59PM -0500, Harold Pritchett wrote: >>>>>>>> What other information do I need which may be available? >>>>>>> What does 'vgscan' say? 'vgchange -a y' ? >>>>>>> >>>>>> [root at mickey www]# vgscan >>>>>> Reading all physical volumes. This may take a while... >>>>>> Found volume group "VolGroup00" using metadata type lvm2 >>>>>> >>>>> Do both Volume Groups on those two sets of disks have the same name? >>>>> VolGroup00 >>>> This is all to common an issue. I make a point that all LVMs are >>>> uniquely named. >>>> >>> Actually, no. The VolGroup00 name is associated with the running >> system. It's the default name when you install CentOS with the default >> option. The vol group on the other disks >>> is "vg0" and is the name I used when I created the system several years >> ago. >> >> I would have expected that to show as a result of the vgscan and >> > I would have expected the same after vgchange. > > >> vgchange commands. Does RAID change things wrt LVM appareance to the >> system? >> > No. OK, I have just written off the disks as corrupt. I put in another pair with yet another raid LV on them. This time I was able to successfully mount the data. Something like this: After assembling the raid array from the two disks with mdadm --assemble /dev/md125 /dev/sdc3 /dev/sdd3 [root at mickey ~]# cat /proc/mdstat Personalities : [raid1] md125 : active raid1 sdc3[0] sdd3[1] 2925020024 blocks super 1.0 [2/2] [UU] [=>...................] resync = 8.5% (249426816/2925020024) finish=357.5min speed=124707K/sec unused devices: <none> [root at mickey ~]# vgscan Reading all physical volumes. This may take a while... Found volume group "rvg" using metadata type lvm2 Found volume group "VolGroup00" using metadata type lvm2 [root at mickey ~]# vgchange -a y 10 logical volume(s) in volume group "rvg" now active 2 logical volume(s) in volume group "VolGroup00" now active [root at mickey ~]# pvscan PV /dev/md125 VG rvg lvm2 [2.72 TB / 1.66 TB free] PV /dev/sda2 VG VolGroup00 lvm2 [465.66 GB / 0 free] PV /dev/sdb1 VG VolGroup00 lvm2 [465.75 GB / 0 free] Total: 3 [3.63 TB] / in use: 3 [3.63 TB] / in no VG: 0 [0 ] [root at mickey ~]# lvscan inactive '/dev/rvg/lv00' [1.00 GB] inherit inactive '/dev/rvg/lv08' [10.00 GB] inherit inactive '/dev/rvg/lv09' [1000.00 GB] inherit inactive '/dev/rvg/lv04' [20.00 GB] inherit inactive '/dev/rvg/lv03' [2.00 GB] inherit inactive '/dev/rvg/lv02' [4.00 GB] inherit inactive '/dev/rvg/lv06' [40.00 GB] inherit inactive '/dev/rvg/lv07' [10.00 GB] inherit inactive '/dev/rvg/lv01' [5.00 GB] inherit inactive '/dev/rvg/lv05' [512.00 MB] inherit ACTIVE '/dev/VolGroup00/LogVol00' [925.75 GB] inherit ACTIVE '/dev/VolGroup00/LogVol01' [5.66 GB] inherit [root at mickey ~]# ls /dev/rvg lv00 lv01 lv02 lv03 lv04 lv05 lv06 lv07 lv08 lv09 [root at mickey ~]# mount /dev/rvg/lv00 /mnt [root at mickey ~]# ls /mnt big dev lib media opt sbin sys usr bin etc lib64 misc proc selinux tftpboot var boot home lost+found mnt root srv tmp [root at mickey ~]#