Hi: I am installing lustre 1.5.95 on a small sun x4200 cluster running FC5 kernel version 2.6.15. I had some difficulty getting kernel patched and rpms compiled, but by reading discussion i was able to get over those problems. The problem now is i am testing the simplest scenario and it failes. I put mgs and mdt on node 1, called gg202. OST on the second node, called gg203. Then client on the third node, called gg204. All the mkfs and mount on these three nodes seems fine, and /proc/fs/lustre/devices seems ok as well. But after i mount the client at gg204 when try to copy sth to the mounted directory on gg204, the gg202 node, i.e., the mgs and mdt node, stops responding. I have to manually power it down. I can not find any useful information at gg201''s system log, and gg202 and gg203''s system log simply says connection lost. So now i am really confused. Thanks for the patience. Dayong Huang Center of Computation and Technology Louisiana State University On the MDT MGS node, gg202: [root@gg202]# mkfs.lustre --fsname=mainfs --mdt --mgs --reformat /dev/ VolGroup00/MDT Permanent disk data: Target: mainfs-MDTffff Index: unassigned UUID: Lustre FS: mainfs Mount type: ldiskfs Flags: 0x75 (MDT MGS needs_index first_time update ) Persistent mount opts: errors=remount-ro,iopen_nopriv,user_xattr Parameters: device size = 224MB formatting backing filesystem ldiskfs on /dev/VolGroup00/MDT target name mainfs-MDTffff 4k blocks 0 options -i 4096 -I 512 -q -O dir_index -F mkfs_cmd = mkfs.ext2 -j -b 4096 -L mainfs-MDTffff -i 4096 -I 512 -q - O dir_index -F /dev/VolGroup00/MDT Writing CONFIGS/mountdata [root@gg202]# mount -t lustre /dev/VolGroup00/MDT /mnt/mainfs/mdt/ [root@gg202]# cat /proc/fs/lustre/devices 0 UP mgs MGS MGS 5 1 UP mgc MGC192.168.1.102@tcp fe3d6e35-83cb-93bf-ea9d-ac3bfa796a6f 5 2 UP mdt MDS MDS_uuid 3 3 UP lov mainfs-mdtlov mainfs-mdtlov_UUID 4 4 UP mds mainfs-MDT0000 mainfs-MDT0000_UUID 3 On the OST node, gg203: [root@gg203]# mkfs.lustre --fsname=mainfs --ost --mgsnode=gg202@tcp0 --reformat /dev/VolGroup00/OST2 Permanent disk data: Target: mainfs-OSTffff Index: unassigned UUID: Lustre FS: mainfs Mount type: ldiskfs Flags: 0x72 (OST needs_index first_time update ) Persistent mount opts: errors=remount-ro,extents,mballoc Parameters: mgsnode=192.168.1.102@tcp device size = 20480MB formatting backing filesystem ldiskfs on /dev/VolGroup00/OST2 target name mainfs-OSTffff 4k blocks 0 options -J size=400 -i 16384 -I 256 -q -O dir_index -F mkfs_cmd = mkfs.ext2 -j -b 4096 -L mainfs-OSTffff -J size=400 -i 16384 -I 256 -q -O dir_index -F /dev/VolGroup00/OST2 Writing CONFIGS/mountdata [root@gg203]# mount -t lustre /dev/VolGroup00/OST2 /mnt/mainfs/ost2/ [root@gg203]# cat /proc/fs/lustre/devices 0 UP mgc MGC192.168.1.102@tcp 3a498b4e-884e-ed25-ee0d-2eadd19789bc 5 1 UP ost OSS OSS_uuid 3 2 UP obdfilter mainfs-OST0000 mainfs-OST0000_UUID 7 On the client node, gg204: [root@gg204]# mount -t lustre gg202@tcp0:/mainfs /mnt/testfs/ [root@gg204]# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/VolGroup00-rootlv 39676508 9884128 27744380 27% / /dev/sda1 194442 25009 159394 14% /boot tmpfs 4021556 0 4021556 0% /dev/shm /dev/mapper/VolGroup00-homelv 20642428 2754120 16839732 15% /home 192.168.1.102@tcp:/mainfs 20642428 455200 19138588 3% /mnt/testfs [root@gg204]# cp /tmp/testfile /mnt/testfs/. This call never returns and gg202 crashes.