Hi there: RedHat6.1 was installed to /dev/hda first, then /dev/hdc(both are same model) was added to the system. I am trying to setup raid 1. After trying so many things. Following is the screen output from "raidstart /dev/md0" Somehow it thinks my /dev/hda6 is not operational. But I am positive that /dev/hda6 is not defective. What I really want to have /dev/hdc6 be updated to whatever /dev/hda6 has. What command should I use to achieve that? Thanks. maxcd. ------------------------------------------------ [root@hostb120 /root]# raidstart /dev/md0 (read) hda6's sb offset: 3028096 [events: 00000005] (read) hdc6's sb offset: 3028096 [events: 00000023] autorun ... considering hdc6 ... adding hdc6 ... adding hda6 ... created md0 bind<hda6,1> bind<hdc6,2> running: <hdc6><hda6> now! hdc6's event counter: 00000023 hda6's event counter: 00000005 md: superblock update time inconsistency -- using the most recent one freshest: hdc6 md: kicking non-fresh hda6 from array! unbind<hda6,1> export_rdev(hda6) raid1: md0, not all disks are operational -- trying to recover array hdc6 [events: 00000024](write) hdc6's sb offset: 3028096 md0: no spare disk to reconstruct array! -- continuing in degraded mode . ... autorun DONE. [root@hostb120 /root] ---------------------------------------------- Following is content of raidtab. cat /etc/raidtab # Sample raid-1 configuration ### hdx5:: md0 /home raiddev /dev/md0 raid-level 1 nr-raid-disks 2 nr-spare-disks 0 chunk-size 4 device /dev/hda6 raid-disk 0 device /dev/hdc6 raid-disk 1 #failed-disk 0 __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com