Neil, I have tried the following: # mdctl -a /dev/md1 /dev/sdb2 # dmesg trying to hot-add [dev 00:00] to md1 ... blkdev_open() failed: -19 md: could not lock [dev 00:00], zero-size? Marking faulty. md: error, md_import_device() returned -22 device sdb2 already used in a RAID array! # cat /proc/mdstat Personalities : [raid1] read_ahead 1024 sectors md1 : active raid1 sdb2[0] sda2[0] 14133568 blocks [2/1] [U_] unused devices: <none> Both disks are identical. I used 'dd' to duplicate the drives while they were unmounted. The 'mdctl -C' command you gave me appeared to work fine. Regards Tim >>> Neil Brown <neilb@cse.unsw.edu.au> 02/08/02 01:35PM >>> On Thursday February 7, Tim.Kent@centrixsystems.com.au wrote: > Here is the output you requested: Thanks. There is something quite sick in that superblock. The superblock has lots of redundancy in it and it isn't always kept consistant. I would recommend that you remake that array with: mdctl -C /dev/md1 -l 1 -n 2 /dev/sda2 missing mdctl -a /dev/md1 /dev/sdb2 NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
