centos 6.6 2x 240gig ssd in raid1 this is a live running production machine and the raid1 is for /u of users home dirs. 1 ssd went totally offline and i replaced it after noticing the firmware levels are not the same. the new ssd has the same level firmware. /dev/sdb is the good ssd /dev/sdc is the new blank ssd when working it was /u1 from /dev/md127p1 and /u2 from /dev/md127p2 p1 is 80gig and p2 is 160gig for the full 240gig size of the ssd > ls -al /dev/md* brw-rw---- 1 root disk 9, 127 Feb 11 11:09 /dev/md127 brw-rw---- 1 root disk 259, 0 Feb 10 20:23 /dev/md127p1 brw-rw---- 1 root disk 259, 1 Feb 10 20:23 /dev/md127p2 /dev/md: total 8 drwxr-xr-x 2 root root 140 Feb 10 20:24 . drwxr-xr-x 20 root root 3980 Feb 10 20:24 .. lrwxrwxrwx 1 root root 8 Feb 11 11:09 240ssd_0 -> ../md127 lrwxrwxrwx 1 root root 10 Feb 10 20:23 240ssd_0p1 -> ../md127p1 lrwxrwxrwx 1 root root 10 Feb 10 20:23 240ssd_0p2 -> ../md127p2 -rw-r--r-- 1 root root 5 Feb 10 20:24 autorebuild.pid -rw------- 1 root root 63 Feb 10 20:23 md-device-map > ps -eaf | grep mdadm root 2188 1 0 Feb10 ? 00:00:00 mdadm --monitor --scan -f --pid-file=/var/run/mdadm/mdadm.pid how do i rebuild /dev/sdc into the mirror of /dev/sdb? and thanks much for the help! steve -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html