<DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">Greetings.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p> </o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">I am hoping that some LVM experts can help me out. I have a partial volume group that spans two drives and I would like to recover the logical volume that was on it so that the data is accessible. The group (VolGroup00) was originally set up spanning part of one drive and all of the other drive (both IDE). The group was entirely applied to a single logical volume (LogVol00) to be mounted as /video. This was working until I tried to make some changes and I fear that I may have lost the data. I cannot seem to resolve this problem anywhere else. I have spent almost two weeks searching for clues and asking for help in other forums, but I do not yet have a solution. I hope to provide all of the useful information below.<o:p></o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p> </o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p></o:p> </DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">History<o:p></o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">I am relatively new to linux, having built my own PVR using Fedora and MythTV during the last year. I have relied heavily upon HowTos and guides written by other users. One of the guides that I followed instructed me to set up XFS using LVM which would allow me to span multiple hard disks. Recently, I added a new SATA drive to my MythTV system. The new drive was designated as /dev/sda. It appeared to add into the existing volume group without any problem, though I did not get it to the point where the space was accessible. I planned to further research that problem; however, the new hard drive failed before I got that far. Here’s what things looked like after removing the drive:<o:p></o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p> </o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">[root[at]mythserver ~]# pvdisplay Couldn't find device with uuid 'fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv'. Couldn't find device with uuid 'fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv'. --- Physical volume --- PV Name /dev/hda5 VG Name VolGroup00 PV Size 66.12 GB / not usable 0 Allocatable yes (but full) PE Size (KByte) 4096 Total PE 16926 Free PE 0 Allocated PE 16926 PV UUID 317l2C-oay1-TWFG-5NTX-XJS3-vLal-Xh5bBL --- Physical volume --- PV Name /dev/hdb VG Name VolGroup00 PV Size 298.09 GB / not usable 0 Allocatable yes (but full) PE Size (KByte) 4096 Total PE 76311 Free PE 0 Allocated PE 76311 PV UUID nfLxS1-0u3t-5Zr9-57iu-1oZe-Bkkd-75SERQ --- Physical volume --- PV Name unknown device VG Name VolGroup00 PV Size 232.88 GB / not usable 0 Allocatable yes PE Size (KByte) 4096 Total PE 59617 Free PE 225 Allocated PE 59392 PV UUID fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv [root[at]mythserver ~]# vgdisplay Couldn't find device with uuid 'fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv'. Couldn't find all physical volumes for volume group VolGroup00. Couldn't find device with uuid 'fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv'. Couldn't find all physical volumes for volume group VolGroup00. Couldn't find device with uuid 'fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv'. Couldn't find all physical volumes for volume group VolGroup00. Couldn't find device with uuid 'fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv'. Couldn't find all physical volumes for volume group VolGroup00. Volume group "VolGroup00" doesn't exist [root[at]mythserver ~]# pvcreate -u fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv /dev/sda Device /dev/sda not found. [root[at]mythserver ~]# vgcfgrestore -tnVolGroup00 /dev/VolGroup00 Test mode: Metadata will NOT be updated. Couldn't find device with uuid 'fxlccO-4li0-nmyD-9avZ-Vc60-GGWX-jUhqOv'. Couldn't find all physical volumes for volume group VolGroup00. Restore failed.<o:p></o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p> </o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">Current Status<o:p></o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">Based on suggestions made elsewhere, I tried to recover the logical volume which was originally on the two functioning drives. Since the new drive failed before I had made the space available to the group, I believed that all data should be recoverable if the LVM structure could be put back to the way it was prior to the addition of the SATA drive. First, I tried "vgreduce --removemissing VolGroup00" which seemed to work. Then, I tried "vgchange -ay --partial VolGroup00" which also appeared to complete successfully. It seems like I was partly successful but I cannot get the logical volume to be recognized. I tried a few other things shown below, and I have done nothing since. I’m afraid to try to experiment commands that I don’t fully understand, and some things don’t seem to be working the way I would expect based upon the LVM HowTo. Please let me know if you can assist me. Thanks in advance for any help you can provide!<o:p></o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p> </o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">[root[at]mythserver ~]# mount -a mount: special device /dev/VolGroup00/LogVol00 does not exist<o:p></o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p> </o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">[root[at]mythserver ~]# vgchange -a y VolGroup00 0 logical volume(s) in volume group "VolGroup00" now active [root[at]mythserver ~]# pvdisplay --- Physical volume --- PV Name /dev/hda5 VG Name VolGroup00 PV Size 66.12 GB / not usable 0 Allocatable yes PE Size (KByte) 4096 Total PE 16926 Free PE 16926 Allocated PE 0 PV UUID 317l2C-oay1-TWFG-5NTX-XJS3-vLal-Xh5bBL --- Physical volume --- PV Name /dev/hdb VG Name VolGroup00 PV Size 298.09 GB / not usable 0 Allocatable yes PE Size (KByte) 4096 Total PE 76311 Free PE 76311 Allocated PE 0 PV UUID nfLxS1-0u3t-5Zr9-57iu-1oZe-Bkkd-75SERQ [root[at]mythserver ~]# vgscan Reading all physical volumes. This may take a while... Found volume group "VolGroup00" using metadata type lvm2 [root[at]mythserver ~]# vgck -vv VolGroup00 Setting global/locking_type to 1 Setting global/locking_dir to /var/lock/lvm File-based locking enabled. Using volume group(s) on command line Locking /var/lock/lvm/V_VolGroup00 RB Finding volume group "VolGroup00" /dev/sda: No label detected /dev/hda1: No label detected /dev/hda2: No label detected /dev/hda3: No label detected /dev/hda5: lvm2 label detected /dev/hdb: lvm2 label detected /dev/hda5: lvm2 label detected /dev/hdb: lvm2 label detected /dev/hda5: lvm2 label detected /dev/hdb: lvm2 label detected /dev/hda5: lvm2 label detected /dev/hdb: lvm2 label detected Unlocking /var/lock/lvm/V_VolGroup00<o:p></o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p> </o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">[root[at]mythserver ~]# lvchange -vvvay /dev/VolGroup00/LogVol00 Processing: lvchange -vvvay /dev/VolGroup00/LogVol00 O_DIRECT will be used Setting global/locking_type to 1 Setting global/locking_dir to /var/lock/lvm File-based locking enabled. Using logical volume(s) on command line Locking /var/lock/lvm/V_VolGroup00 WB Opened /dev/sda RW /dev/sda: block size is 4096 bytes /dev/sda: No label detected Opened /dev/hda1 RW /dev/hda1: block size is 1024 bytes /dev/hda1: No label detected Opened /dev/hda2 RW /dev/hda2: block size is 4096 bytes /dev/hda2: No label detected Opened /dev/hda3 RW /dev/hda3: block size is 4096 bytes /dev/hda3: No label detected Opened /dev/hda5 RW /dev/hda5: block size is 512 bytes /dev/hda5: lvm2 label detected lvmcache: /dev/hda5 now orphaned lvmcache: /dev/hda5 now in VG VolGroup00 Opened /dev/hdb RW /dev/hdb: block size is 4096 bytes /dev/hdb: lvm2 label detected lvmcache: /dev/hdb now orphaned lvmcache: /dev/hdb now in VG VolGroup00 /dev/hda5: lvm2 label detected /dev/hdb: lvm2 label detected /dev/hda5: lvm2 label detected /dev/hdb: lvm2 label detected Read VolGroup00 metadata (11) from /dev/hda5 at 18944 size 720 /dev/hda5: lvm2 label detected /dev/hdb: lvm2 label detected Read VolGroup00 metadata (11) from /dev/hdb at 16896 size 720 One or more specified logical volume(s) not found. Unlocking /var/lock/lvm/V_VolGroup00 Closed /dev/sda Closed /dev/hda1 Closed /dev/hda2 Closed /dev/hda3 Closed /dev/hda5 Closed /dev/hdb [root[at]mythserver ~]# lvscan -vvv Processing: lvscan -vvv O_DIRECT will be used Setting global/locking_type to 1 Setting global/locking_dir to /var/lock/lvm File-based locking enabled. Finding all logical volumes Opened /dev/sda RO /dev/sda: block size is 4096 bytes /dev/sda: No label detected Closed /dev/sda Opened /dev/hda1 RO /dev/hda1: block size is 1024 bytes /dev/hda1: No label detected Closed /dev/hda1 Opened /dev/hda2 RO /dev/hda2: block size is 4096 bytes /dev/hda2: No label detected Closed /dev/hda2 Opened /dev/hda3 RO /dev/hda3: block size is 4096 bytes /dev/hda3: No label detected Closed /dev/hda3 Opened /dev/hda5 RO /dev/hda5: block size is 512 bytes /dev/hda5: lvm2 label detected Closed /dev/hda5 lvmcache: /dev/hda5 now orphaned Opened /dev/hda5 RO /dev/hda5: block size is 512 bytes Closed /dev/hda5 lvmcache: /dev/hda5 now in VG VolGroup00 Opened /dev/hdb RO /dev/hdb: block size is 4096 bytes /dev/hdb: lvm2 label detected Closed /dev/hdb lvmcache: /dev/hdb now orphaned Opened /dev/hdb RO /dev/hdb: block size is 4096 bytes Closed /dev/hdb lvmcache: /dev/hdb now in VG VolGroup00 Locking /var/lock/lvm/V_VolGroup00 RB Opened /dev/hda5 RO /dev/hda5: block size is 512 bytes /dev/hda5: lvm2 label detected Opened /dev/hdb RO /dev/hdb: block size is 4096 bytes /dev/hdb: lvm2 label detected /dev/hda5: lvm2 label detected /dev/hdb: lvm2 label detected Read VolGroup00 metadata (11) from /dev/hda5 at 18944 size 720 /dev/hda5: lvm2 label detected /dev/hdb: lvm2 label detected Read VolGroup00 metadata (11) from /dev/hdb at 16896 size 720 Unlocking /var/lock/lvm/V_VolGroup00 Closed /dev/hda5 Closed /dev/hdb [root[at]mythserver ~]# lvdisplay -vvv Processing: lvdisplay -vvv O_DIRECT will be used Setting global/locking_type to 1 Setting global/locking_dir to /var/lock/lvm File-based locking enabled. Finding all logical volumes Opened /dev/sda RO /dev/sda: block size is 4096 bytes /dev/sda: No label detected Closed /dev/sda Opened /dev/hda1 RO /dev/hda1: block size is 1024 bytes /dev/hda1: No label detected Closed /dev/hda1 Opened /dev/hda2 RO /dev/hda2: block size is 4096 bytes /dev/hda2: No label detected Closed /dev/hda2 Opened /dev/hda3 RO /dev/hda3: block size is 4096 bytes /dev/hda3: No label detected Closed /dev/hda3 Opened /dev/hda5 RO /dev/hda5: block size is 512 bytes /dev/hda5: lvm2 label detected Closed /dev/hda5 lvmcache: /dev/hda5 now orphaned Opened /dev/hda5 RO /dev/hda5: block size is 512 bytes Closed /dev/hda5 lvmcache: /dev/hda5 now in VG VolGroup00 Opened /dev/hdb RO /dev/hdb: block size is 4096 bytes /dev/hdb: lvm2 label detected Closed /dev/hdb lvmcache: /dev/hdb now orphaned Opened /dev/hdb RO /dev/hdb: block size is 4096 bytes Closed /dev/hdb lvmcache: /dev/hdb now in VG VolGroup00 Locking /var/lock/lvm/V_VolGroup00 RB Opened /dev/hda5 RO /dev/hda5: block size is 512 bytes /dev/hda5: lvm2 label detected Opened /dev/hdb RO /dev/hdb: block size is 4096 bytes /dev/hdb: lvm2 label detected /dev/hda5: lvm2 label detected /dev/hdb: lvm2 label detected Read VolGroup00 metadata (11) from /dev/hda5 at 18944 size 720 /dev/hda5: lvm2 label detected /dev/hdb: lvm2 label detected Read VolGroup00 metadata (11) from /dev/hdb at 16896 size 720 Unlocking /var/lock/lvm/V_VolGroup00 Closed /dev/hda5 Closed /dev/hdb<o:p></o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p> </o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p> </o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">P.S. A full history of my posts on the MythTV mailing list can be viewed here:</DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><A href="http://www.gossamer-threads.com/lists/mythtv/users/218118">http://www.gossamer-threads.com/lists/mythtv/users/218118</A></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p> </o:p></DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">Thank you, again. :-)</DIV> <DIV class=MsoNormal style="MARGIN: 0in 0in 0pt">-Tom-<o:p></o:p></DIV> <hr size=1><a href="http://us.rd.yahoo.com/evt=43256/*http://advision.webevents.yahoo.com/mailbeta"> All-new Yahoo! Mail </a>- Fire up a more powerful email and get things done faster.