Inactive OST means that the MDS cannot contact the OST for some reason (OST is not running, firewall rules, etc). You need to check console logs on MDS or OSS to see why. Cheers, Andreas On Dec 22, 2013, at 0:04, "Amjad Syed" <amjadcsu@gmail.com<mailto:amjadcsu@gmail.com>> wrote: Hello, My apologies if this a simple question, but i am a newbie to lustre and trying to debug an issue of mount. I have Lustre MDT at 1.8.7 and clients at 1.8.9. The OSTS are up but not active lctl dl 0 UP mgs MGS MGS 7 1 UP mgc MGC10.129.1.111@o2ib 8b175398-7e96-12ff-78ba-eb735bfdd319 5 2 UP mdt MDS MDS_uuid 3 3 UP lov lustre-mdtlov lustre-mdtlov_UUID 4 4 UP mds lustre-MDT0000 lustre-MDT0000_UUID 8 5 UP osc lustre-OST0000-osc lustre-mdtlov_UUID 5 6 UP osc lustre-OST0001-osc lustre-mdtlov_UUID 5 7 UP osc lustre-OST0002-osc lustre-mdtlov_UUID 5 8 UP osc lustre-OST0003-osc lustre-mdtlov_UUID 5 9 UP osc lustre-OST0004-osc lustre-mdtlov_UUID 5 10 UP osc lustre-OST0005-osc lustre-mdtlov_UUID 5 11 UP osc lustre-OST0006-osc lustre-mdtlov_UUID 5 12 UP osc lustre-OST0007-osc lustre-mdtlov_UUID 5 13 UP osc lustre-OST0008-osc lustre-mdtlov_UUID 5 14 UP osc lustre-OST0009-osc lustre-mdtlov_UUID 5 15 UP osc lustre-OST000a-osc lustre-mdtlov_UUID 5 16 UP osc lustre-OST000b-osc lustre-mdtlov_UUID 5 17 UP osc lustre-OST000c-osc lustre-mdtlov_UUID 5 18 UP osc lustre-OST000d-osc lustre-mdtlov_UUID 5 19 UP osc lustre-OST000e-osc lustre-mdtlov_UUID 5 20 UP osc lustre-OST000f-osc lustre-mdtlov_UUID 5 21 UP osc lustre-OST0010-osc lustre-mdtlov_UUID 5 22 UP osc lustre-OST0011-osc lustre-mdtlov_UUID 5 23 UP osc lustre-OST0012-osc lustre-mdtlov_UUID 5 24 UP osc lustre-OST0013-osc lustre-mdtlov_UUID 5 25 UP osc lustre-OST0014-osc lustre-mdtlov_UUID 5 26 UP osc lustre-OST0015-osc lustre-mdtlov_UUID 5 27 UP osc lustre-OST0016-osc lustre-mdtlov_UUID 5 28 UP osc lustre-OST0017-osc lustre-mdtlov_UUID 5 cat /proc/fs/lustre/lov/lustre-mdtlov/target_obd 0: lustre-OST0000_UUID INACTIVE 1: lustre-OST0001_UUID INACTIVE 2: lustre-OST0002_UUID INACTIVE 3: lustre-OST0003_UUID INACTIVE 4: lustre-OST0004_UUID INACTIVE 5: lustre-OST0005_UUID INACTIVE 6: lustre-OST0006_UUID INACTIVE 7: lustre-OST0007_UUID INACTIVE 8: lustre-OST0008_UUID INACTIVE 9: lustre-OST0009_UUID INACTIVE 10: lustre-OST000a_UUID INACTIVE 11: lustre-OST000b_UUID INACTIVE 12: lustre-OST000c_UUID INACTIVE 13: lustre-OST000d_UUID INACTIVE 14: lustre-OST000e_UUID INACTIVE 15: lustre-OST000f_UUID INACTIVE 16: lustre-OST0010_UUID INACTIVE 17: lustre-OST0011_UUID INACTIVE 18: lustre-OST0012_UUID INACTIVE 19: lustre-OST0013_UUID INACTIVE 20: lustre-OST0014_UUID INACTIVE 21: lustre-OST0015_UUID INACTIVE 22: lustre-OST0016_UUID INACTIVE 23: lustre-OST0017_UUID INACTIVE So the question is how can i activate the INACTIVE OSTS? Thanks _______________________________________________ Lustre-discuss mailing list Lustre-discuss@lists.lustre.org<mailto:Lustre-discuss@lists.lustre.org> http://lists.lustre.org/mailman/listinfo/lustre-discuss