what do you get from the commands: pvs -v vgs -v lvs and, if pvs shows any /dev/mdXX devices, the output of mdadm --detail /dev/mdXX ? example output... # pvs -v Scanning for physical volume names PV VG Fmt Attr PSize PFree DevSize PV UUID /dev/md127 vgdata lvm2 a-- 1.82t 19.68g 1.82t pPuDNs-AVQ8-92tw-TXcT-WWyD-nPhQ-dZqpx0 /dev/sda2 vg_myhost lvm2 a-- 476.45g 5.36g 476.45g EWe4ws-1Z6S-v9d6-gvQ2-e7QE-K58b-Sd1W5z # mdadm --detail /dev/md127 /dev/md127: Version : 1.2 Creation Time : Sat Jun 14 13:18:25 2014 Raid Level : raid1 Array Size : 1953383232 (1862.89 GiB 2000.26 GB) Used Dev Size : 1953383232 (1862.89 GiB 2000.26 GB) Raid Devices : 2 Total Devices : 2 Persistence : Superblock is persistent Update Time : Mon Oct 27 22:35:55 2014 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Name : myhost:0 (local to host myhost) UUID : d9c90fda:9a0e5d4f:d27cf1f6:19d0b43a Events : 441 Number Major Minor RaidDevice State 0 8 17 0 active sync /dev/sdb1 1 8 33 1 active sync /dev/sdc1 # vgs -v Finding all volume groups Finding volume group "vgdata" Finding volume group "vg_myhost" VG Attr Ext #PV #LV #SN VSize VFree VG UUID VProfile vg_myhost wz--n- 4.00m 1 6 0 476.45g 5.36g cX6DQy-iDY2-mL0Q-zM1m-pgf2-kLdE-8zWtIG vgdata wz--n- 4.00m 1 1 0 1.82t 19.68g USqdKh-VIv7-TrCE-2RXn-52oG-7Qed-01URWg # lvs LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert lv_home vg_myhost -wi-ao---- 29.30g lv_root vg_myhost -wi-ao---- 50.00g lv_swap vg_myhost -wi-ao---- 11.80g lvimages vg_myhost -wi-ao---- 150.00g lvpgsql vg_myhost -wi-ao---- 30.00g lvtest vg_myhost -wi-a----- 200.00g lvhome2 vgdata -wi-ao---- 1.80t -- john r pierce 37N 122W somewhere on the middle of the left coast