Hi, I recently upgraded my 2 disk RAID-1 array from 1.5TB to 2TB disks. When I started I had 10 MD devices. Since the last partition was small, I removed the filesystems and deleted the associated RAID device. The I created two new devices and split the extra 500 GB between them. Everything was good until I rebooted. Now two of the raid devices are 'gone'. Here is what mdadm shows at the moment: santos@bender:/etc/mdadm$ sudo mdadm --examine --scan ARRAY /dev/md120 UUID=3fa7ec2e:7a19093c:34d348bd:5f81ddcb ARRAY /dev/md119 UUID=302f5a8a:f963c76e:53433e04:4146b04d ARRAY /dev/md125 UUID=a0535363:3799280a:1b1dd2b9:44680fa2 ARRAY /dev/md124 UUID=54742635:24ba2035:bcddc93e:73fc2c19 ARRAY /dev/md123 UUID=56613b81:36bc9bcd:fe538cc8:51817c6b ARRAY /dev/md126 UUID=c5d4e3e5:ab520847:f5483f4e:4a7373f8 ARRAY /dev/md127 UUID=3983523a:740e09fa:84f2985e:c6521efa ARRAY /dev/md121 UUID=35bd0dff:1fa423f5:f8fb6389:ecaefea8 ARRAY /dev/md122 UUID=ebbd009c:33fcc44c:8907793b:1d800ee1 ARRAY /dev/md/11 metadata=1.2 UUID=32bde3b1:b0475886:3ce4bba7:3bd12900 name=bender:11 ARRAY /dev/md/12 metadata=1.2 UUID=0257dbbd:42d8d666:2173709f:4dd0a1a6 name=bender:12 The last two devices are the new ones. fstab: UUID="57382674-3289-4cc8-a2d0-a57d44ea1458" /home ext3 defaults 2 UUID="478cca47-6f26-4550-9813-223d0d65b851" /mnt/part06 ext3 defaults 2 UUID="58c85e32-07d9-445d-b971-34d96c03a765" /mnt/part07 ext3 defaults 2 UUID="5d7d89cd-c04d-4916-bb9a-a28256d928a9" /mnt/part08 ext3 defaults 2 UUID="1da60cba-5f1d-4a8f-925a-6e3d80611b8d" /mnt/part09 ext3 defaults 2 UUID="241199c9-4b6a-49d6-a270-1db07691f99c" /mnt/part10 ext3 defaults 2 <-- Failed to mount UUID="af7dc965-261b-4995-84ca-0ebb0c014efb" /mnt/part11 ext3 defaults 2 <-- Failed to mount UUID="6a896a4e-aee0-41a8-8a29-2cb021f4149c" /mnt/part12 ext3 defaults 2 UUID="96379e3c-78f6-4cb4-984a-85be455263c3" /mnt/part13 ext3 defaults 2 UUID="2f8c7084-8610-4f11-97b8-5bc25ad9a7df" /mnt/part14 ext4 defaults 2 UUID="015fe797-e79c-4dd0-bbef-4c6c59287262" /mnt/part15 ext4 defaults 2 mount: /dev/md120 on /home type ext3 (rw) /dev/md119 on /mnt/part06 type ext3 (rw) /dev/md125 on /mnt/part07 type ext3 (rw) /dev/md124 on /mnt/part08 type ext3 (rw) /dev/md123 on /mnt/part09 type ext3 (rw) /dev/md121 on /mnt/part12 type ext3 (rw) /dev/md122 on /mnt/part13 type ext3 (rw) /dev/md126 on /mnt/part14 type ext4 (rw) <--- New /dev/md127 on /mnt/part15 type ext4 (rw) <--- New What seems to have happened is that /dev/md/11 and /dev/md/12 are now named /dev/md126 and /dev/md127. If I examine a couple of the partitions that should be part of /dev/md126 and /dev/md127, I see this: santos@bender:/etc/mdadm$ sudo mdadm --examine /dev/sda7 /dev/sda7: Magic : a92b4efc Version : 0.90.00 UUID : c5d4e3e5:ab520847:f5483f4e:4a7373f8 Creation Time : Fri Oct 30 12:30:04 2009 Raid Level : raid1 Used Dev Size : 157292288 (150.01 GiB 161.07 GB) Array Size : 157292288 (150.01 GiB 161.07 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 126 Update Time : Mon May 20 15:00:19 2013 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Checksum : fff3c4a9 - correct Events : 7003 Number Major Minor RaidDevice State this 0 8 7 0 active sync /dev/sda7 0 0 8 7 0 active sync /dev/sda7 1 1 8 23 1 active sync /dev/sdb7 santos@bender:/etc/mdadm$ sudo mdadm --examine /dev/sda8 /dev/sda8: Magic : a92b4efc Version : 0.90.00 UUID : 3983523a:740e09fa:84f2985e:c6521efa Creation Time : Fri Oct 30 12:30:21 2009 Raid Level : raid1 Used Dev Size : 157292288 (150.01 GiB 161.07 GB) Array Size : 157292288 (150.01 GiB 161.07 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 127 Update Time : Mon May 20 15:00:19 2013 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Checksum : 47e70f24 - correct Events : 1665 Number Major Minor RaidDevice State this 0 8 8 0 active sync /dev/sda8 0 0 8 8 0 active sync /dev/sda8 1 1 8 24 1 active sync /dev/sdb8 Notice the Preferred Minor numbers. It looks like the two new RAID devices took over the devices with the highest minor numbers. I don't know what I did to get into this situation, but could really use some help getting out of it. TIA -- 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
