I'm using Scientific Linux release 6.1 (Carbon) Lustre 2.2. I tried to mount the client I got the error-- [root@nexus net_dugan]# mount -t lustre 10.0.0.1@tcp0:/netfs /lustre mount.lustre: mount 10.0.0.1@tcp0:/netfs at /lustre failed: No such file or directory Is the MGS specification correct? Is the filesystem name correct? If upgrading, is the copied client log valid? (see upgrade docs) This is my device list on my metadata server. [root@metadata net_linov]# lctl dl 0 UP mgs MGS MGS 17 1 UP mgc MGC10.0.0.1@tcp 45e4df62-b918-6b19-5752-73ca2f6359f5 5 2 UP lov netfs-MDT0000-mdtlov netfs-MDT0000-mdtlov_UUID 4 3 UP mdt netfs-MDT0000 netfs-MDT0000_UUID 5 4 UP mds mdd_obd-netfs-MDT0000 mdd_obd_uuid-netfs-MDT0000 3 5 UP osc netfs-OST000a-osc-MDT0000 netfs-MDT0000-mdtlov_UUID 5 6 UP osc netfs-OST0001-osc-MDT0000 netfs-MDT0000-mdtlov_UUID 5 7 UP osc netfs-OST0004-osc-MDT0000 netfs-MDT0000-mdtlov_UUID 5 * 8 AT osc netfs-OST0005-osc-MDT0000 netfs-MDT0000-mdtlov_UUID 1* 9 UP osc netfs-OST0002-osc-MDT0000 netfs-MDT0000-mdtlov_UUID 5 10 UP osc netfs-OST0006-osc-MDT0000 netfs-MDT0000-mdtlov_UUID 5 11 UP osc netfs-OST0007-osc-MDT0000 netfs-MDT0000-mdtlov_UUID 5 12 UP osc netfs-OST0003-osc-MDT0000 netfs-MDT0000-mdtlov_UUID 5 13 UP osc netfs-OST000b-osc-MDT0000 netfs-MDT0000-mdtlov_UUID 5 14 UP osc netfs-OST0009-osc-MDT0000 netfs-MDT0000-mdtlov_UUID 5 *Just wondering why the OST0005 is in AT state?* Because of the AT state I'm not able to do mount the file system. By mistake I have deleted the pool information as well. All I want is just retrieve the data. I ran write-conf on metadata server, ran e2fsprogs as well, still no luck. Can anyone help me on this? Thanks, Linov.