Since it was removed, it is not a disk. It is no disk. The question is: what disk was it? You could determine which disks it is not! If you access your array, every disk in it will have disk activity. The disks that do not have activity are not in the array. If you have more arrays, you would need to determine which disks they use also. If you have non array disks, you will need to identify them also. Once all but one disk is identified, it must be your disk. Use a command like this to cause your disks to have activity, then look for the blinking lights: dd if=/dev/md/1 of=/dev/null bs=64k Guy -----Original Message----- From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid-owner@xxxxxxxxxxxxxxx] On Behalf Of Turbo Fredriksson Sent: Tuesday, December 21, 2004 6:09 AM To: linux-raid@xxxxxxxxxxxxxxx Subject: Which (physical) disk is broken? I've forgot, and I can't seem to find out which physical disk is broken/removed from an array... ----- s n i p ----- aurora:~# mdadm -D /dev/md/1 /dev/md/1: Version : 00.90.01 Creation Time : Wed Oct 27 08:12:44 2004 Raid Level : raid5 Array Size : 141483520 (134.93 GiB 144.88 GB) Device Size : 17685440 (16.87 GiB 18.11 GB) Raid Devices : 9 Total Devices : 8 Preferred Minor : 1 Persistence : Superblock is persistent Update Time : Tue Dec 21 12:04:43 2004 State : dirty, degraded Active Devices : 8 Working Devices : 8 Failed Devices : 0 Spare Devices : 0 Layout : left-symmetric Chunk Size : 32K Number Major Minor RaidDevice State 0 8 49 0 active sync /dev/scsi/host3/bus0/target4/lun0/part1 1 8 81 1 active sync /dev/scsi/host3/bus0/target8/lun0/part1 2 8 97 2 active sync /dev/scsi/host3/bus0/target9/lun0/part1 3 8 241 3 active sync /dev/scsi/host4/bus0/target4/lun0/part1 4 65 1 4 active sync /dev/scsi/host4/bus0/target5/lun0/part1 5 65 17 5 active sync /dev/scsi/host4/bus0/target8/lun0/part1 6 65 33 6 active sync /dev/scsi/host4/bus0/target9/lun0/part1 7 65 113 7 active sync /dev/scsi/host4/bus0/target14/lun0/part1 8 0 0 -1 removed UUID : d0b4e775:290f5785:2e6ad7d1:5a66178b Events : 0.974012 ----- s n i p ----- I _THINK_ (!!) it's '/dev/scsi/host4/bus0/target15/lun0/part', but I'm not sure.... Don't want to yank a perfectly working disk :) ----- s n i p ----- aurora:~# mdadm -E /dev/scsi/host4/bus0/target15/lun0/part1 mdadm: No super block found on /dev/scsi/host4/bus0/target15/lun0/part1 (Expected magic a92b4efc, got 00000000) ----- s n i p ----- Is there any way I can find out exactly which disk 'number 8' is? ----- s n i p ----- aurora:~# mdadm --version mdadm - v1.6.0 - 4 June 2004 aurora:~# uname -a Linux aurora 2.6.8.1 #1 SMP Sun Dec 12 21:04:58 CET 2004 sparc64 unknown ----- s n i p ----- -- Ortega assassination explosion FBI president PLO Iran domestic disruption genetic Ft. Bragg Rule Psix $400 million in gold bullion Clinton Cocaine Treasury [See http://www.aclu.org/echelonwatch/index.html for more about this] - 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 - 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
