It occurs when i repeat the following steps. Lustre version is 1.6-beta7 runs on rhel4.4(mds,ost and client) 1. deactivate a ost on mds ( lctl conf_param pogo-OST0000.osc.active=0) 2. umount lustre-fs on client 3. remount lustre-fs on client 4. run " lfs check osts" on client -------------- next part -------------- A non-text attachment was scrubbed... Name: lustre.jpg Type: image/jpeg Size: 91680 bytes Desc: not available Url : http://mail.clusterfs.com/pipermail/lustre-discuss/attachments/20070208/4d2ca878/lustre-0001.jpg