Hi all, I've been running LVM for about a year on non-raided gear and just recently got two 500gb drives to RAID 1. I've got a 15gig OS partition, 2gigs swap and the rest is going to the LVM where it will be joined later by additional raided drive pairs. My problem is that my pvcreate *appears* to work but my pvdisplay doesn't seem to agree as it always reports no physical volumes. I've pasted all the relevant bits and pieces below. I'd love to get some feedback! Thanks in advance. Jonathan. ############################################ First some history ############################################ root@dingo:~# lvm version LVM version: 2.02.06 (2006-05-12) Library version: 1.02.08 (2006-07-17) Driver version: 4.11.0 root@dingo:~# lvmdiskscan /dev/ram0 [ 64.00 MB] /dev/md0 [ 14.65 GB] /dev/ram1 [ 64.00 MB] /dev/md1 [ 1.95 GB] /dev/ram2 [ 64.00 MB] /dev/md2 [ 449.16 GB] LVM physical volume /dev/ram3 [ 64.00 MB] /dev/ram4 [ 64.00 MB] /dev/ram5 [ 64.00 MB] /dev/ram6 [ 64.00 MB] /dev/ram7 [ 64.00 MB] /dev/ram8 [ 64.00 MB] /dev/ram9 [ 64.00 MB] /dev/ram10 [ 64.00 MB] /dev/ram11 [ 64.00 MB] /dev/ram12 [ 64.00 MB] /dev/ram13 [ 64.00 MB] /dev/ram14 [ 64.00 MB] /dev/ram15 [ 64.00 MB] 0 disks 18 partitions 0 LVM physical volume whole disks 1 LVM physical volume #################################### And now the verbose pvcreate #################################### root@dingo:~# pvcreate /dev/md2 -vv Setting global/locking_type to 1 Setting global/locking_dir to /var/lock/lvm File-based locking enabled. Locking /var/lock/lvm/P_orphans WB /dev/md2: lvm2 label detected /dev/md2: lvm2 label detected Wiping cache of LVM-capable devices /dev/sndstat: stat failed: No such file or directory /dev/ram0: size is 131072 sectors /dev/ram0: size is 131072 sectors /dev/ram0: No label detected /dev/sda: size is 976773168 sectors /dev/md0: size is 30716032 sectors /dev/md0: size is 30716032 sectors /dev/md0: No label detected /dev/ram1: size is 131072 sectors /dev/ram1: size is 131072 sectors /dev/ram1: No label detected /dev/sda1: size is 30716217 sectors /dev/sda1: size is 30716217 sectors /dev/md1: size is 4096384 sectors /dev/md1: size is 4096384 sectors /dev/md1: No label detected /dev/ram2: size is 131072 sectors /dev/ram2: size is 131072 sectors /dev/ram2: No label detected /dev/sda2: size is 4096575 sectors /dev/sda2: size is 4096575 sectors /dev/md2: size is 941955072 sectors /dev/md2: size is 941955072 sectors /dev/md2: lvm2 label detected /dev/ram3: size is 131072 sectors /dev/ram3: size is 131072 sectors /dev/ram3: No label detected /dev/sda3: size is 941955210 sectors /dev/sda3: size is 941955210 sectors /dev/ram4: size is 131072 sectors /dev/ram4: size is 131072 sectors /dev/ram4: No label detected /dev/ram5: size is 131072 sectors /dev/ram5: size is 131072 sectors /dev/ram5: No label detected /dev/ram6: size is 131072 sectors /dev/ram6: size is 131072 sectors /dev/ram6: No label detected /dev/ram7: size is 131072 sectors /dev/ram7: size is 131072 sectors /dev/ram7: No label detected /dev/ram8: size is 131072 sectors /dev/ram8: size is 131072 sectors /dev/ram8: No label detected /dev/ram9: size is 131072 sectors /dev/ram9: size is 131072 sectors /dev/ram9: No label detected /dev/ram10: size is 131072 sectors /dev/ram10: size is 131072 sectors /dev/ram10: No label detected /dev/ram11: size is 131072 sectors /dev/ram11: size is 131072 sectors /dev/ram11: No label detected /dev/ram12: size is 131072 sectors /dev/ram12: size is 131072 sectors /dev/ram12: No label detected /dev/ram13: size is 131072 sectors /dev/ram13: size is 131072 sectors /dev/ram13: No label detected /dev/ram14: size is 131072 sectors /dev/ram14: size is 131072 sectors /dev/ram14: No label detected /dev/ram15: size is 131072 sectors /dev/ram15: size is 131072 sectors /dev/ram15: No label detected /dev/sdb: size is 976773168 sectors /dev/sdb1: size is 30716217 sectors /dev/sdb1: size is 30716217 sectors /dev/sdb2: size is 4096575 sectors /dev/sdb2: size is 4096575 sectors /dev/sdb3: size is 941955210 sectors /dev/sdb3: size is 941955210 sectors /dev/md2: size is 941955072 sectors metadata/pvmetadatasize not found in config: defaulting to 255 metadata/pvmetadatacopies not found in config: defaulting to 1 /dev/md2: size is 941955072 sectors Set up physical volume for "/dev/md2" with 941954688 available sectors Scanning for labels to wipe from /dev/md2 /dev/md2: Wiping label at sector 1 Zeroing start of device /dev/md2 Writing physical volume data to disk "/dev/md2" /dev/md2: Writing label to sector 1 Physical volume "/dev/md2" successfully created Unlocking /var/lock/lvm/P_orphans ################################### And now the verbose pvdisplay ################################### root@dingo:~# pvdisplay -vvv Processing: pvdisplay -vvv O_DIRECT will be used Setting global/locking_type to 1 Setting global/locking_dir to /var/lock/lvm File-based locking enabled. Scanning for physical volume names /dev/ram0: Not using O_DIRECT Opened /dev/ram0 RO /dev/ram0: block size is 1024 bytes /dev/ram0: No label detected Closed /dev/ram0 Opened /dev/md0 RO O_DIRECT /dev/md0: block size is 4096 bytes /dev/md0: No label detected Closed /dev/md0 /dev/ram1: Not using O_DIRECT Opened /dev/ram1 RO /dev/ram1: block size is 1024 bytes /dev/ram1: No label detected Closed /dev/ram1 Opened /dev/md1 RO O_DIRECT /dev/md1: block size is 4096 bytes /dev/md1: No label detected Closed /dev/md1 /dev/ram2: Not using O_DIRECT Opened /dev/ram2 RO /dev/ram2: block size is 1024 bytes /dev/ram2: No label detected Closed /dev/ram2 Opened /dev/md2 RO O_DIRECT /dev/md2: block size is 4096 bytes /dev/md2: lvm2 label detected lvmcache: /dev/md2: now orphaned Closed /dev/md2 /dev/ram3: Not using O_DIRECT Opened /dev/ram3 RO /dev/ram3: block size is 1024 bytes /dev/ram3: No label detected Closed /dev/ram3 /dev/ram4: Not using O_DIRECT Opened /dev/ram4 RO /dev/ram4: block size is 1024 bytes /dev/ram4: No label detected Closed /dev/ram4 /dev/ram5: Not using O_DIRECT Opened /dev/ram5 RO /dev/ram5: block size is 1024 bytes /dev/ram5: No label detected Closed /dev/ram5 /dev/ram6: Not using O_DIRECT Opened /dev/ram6 RO /dev/ram6: block size is 1024 bytes /dev/ram6: No label detected Closed /dev/ram6 /dev/ram7: Not using O_DIRECT Opened /dev/ram7 RO /dev/ram7: block size is 1024 bytes /dev/ram7: No label detected Closed /dev/ram7 /dev/ram8: Not using O_DIRECT Opened /dev/ram8 RO /dev/ram8: block size is 1024 bytes /dev/ram8: No label detected Closed /dev/ram8 /dev/ram9: Not using O_DIRECT Opened /dev/ram9 RO /dev/ram9: block size is 1024 bytes /dev/ram9: No label detected Closed /dev/ram9 /dev/ram10: Not using O_DIRECT Opened /dev/ram10 RO /dev/ram10: block size is 1024 bytes /dev/ram10: No label detected Closed /dev/ram10 /dev/ram11: Not using O_DIRECT Opened /dev/ram11 RO /dev/ram11: block size is 1024 bytes /dev/ram11: No label detected Closed /dev/ram11 /dev/ram12: Not using O_DIRECT Opened /dev/ram12 RO /dev/ram12: block size is 1024 bytes /dev/ram12: No label detected Closed /dev/ram12 /dev/ram13: Not using O_DIRECT Opened /dev/ram13 RO /dev/ram13: block size is 1024 bytes /dev/ram13: No label detected Closed /dev/ram13 /dev/ram14: Not using O_DIRECT Opened /dev/ram14 RO /dev/ram14: block size is 1024 bytes /dev/ram14: No label detected Closed /dev/ram14 /dev/ram15: Not using O_DIRECT Opened /dev/ram15 RO /dev/ram15: block size is 1024 bytes /dev/ram15: No label detected Closed /dev/ram15 ##################################### The not so verbose pvdisplay ##################################### root@dingo:~# pvdisplay -v Scanning for physical volume names root@dingo:~#