Below is the output from lsblk, mdadm and /proc/mdstat for my 2 disk Raid1 array
anand@ironman:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 465.8G 0 disk
|-sda1 8:1 0 976M 0 part
| `-md0 9:0 0 975.4M 0 raid1
| `-vg_boot-boot (dm-6) 253:6 0 972M 0 lvm /boot
`-sda2 8:2 0 464.8G 0 part
sdb 8:16 0 465.8G 0 disk
|-sdb1 8:17 0 976M 0 part
`-sdb2 8:18 0 464.8G 0 part
`-md1 9:1 0 464.7G 0 raid1
|-vg00-root (dm-0) 253:0 0 93.1G 0 lvm /
|-vg00-home (dm-1) 253:1 0 96.6G 0 lvm /home
|-vg00-var (dm-2) 253:2 0 46.6G 0 lvm /var
|-vg00-usr (dm-3) 253:3 0 46.6G 0 lvm /usr
|-vg00-swap1 (dm-4) 253:4 0 7.5G 0 lvm [SWAP]
`-vg00-tmp (dm-5) 253:5 0 952M 0 lvm /tmp
anand@ironman:~$ cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 sdb2[1]
487253824 blocks super 1.2 [2/1] [_U]
md0 : active raid1 sda1[0]
998848 blocks super 1.2 [2/1] [U_]
unused devices: <none>
anand@ironman:~$ sudo mdadm -D /dev/md0 /dev/md1
/dev/md0:
Version : 1.2
Creation Time : Wed May 22 21:00:35 2013
Raid Level : raid1
Array Size : 998848 (975.60 MiB 1022.82 MB)
Used Dev Size : 998848 (975.60 MiB 1022.82 MB)
Raid Devices : 2
Total Devices : 1
Persistence : Superblock is persistent
Update Time : Thu Oct 21 14:35:36 2021
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Name : ironman:0 (local to host ironman)
UUID : cbcb9fb6:f7727516:9328d30a:0a970c9b
Events : 4415
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 0 0 1 removed
/dev/md1:
Version : 1.2
Creation Time : Wed May 22 21:00:47 2013
Raid Level : raid1
Array Size : 487253824 (464.68 GiB 498.95 GB)
Used Dev Size : 487253824 (464.68 GiB 498.95 GB)
Raid Devices : 2
Total Devices : 1
Persistence : Superblock is persistent
Update Time : Thu Oct 21 14:35:45 2021
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Name : ironman:1 (local to host ironman)
UUID : 3f64c0ce:fcb9ff92:d5fd68d7:844b7e12
Events : 63025777
Number Major Minor RaidDevice State
0 0 0 0 removed
1 8 18 1 active sync /dev/sdb2
What are the commands to use to recover from the raid1 failure?
Do I have to get a new hard drive to safely reassemble the raid1
setup?
Update 1:
anand@ironman:~$ sudo smartctl -H /dev/sda
smartctl 5.41 2011-06-09 r3365 [x86_64-linux-3.2.0-4-amd64] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
Please note the following marginal Attributes:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
190 Airflow_Temperature_Cel 0x0022 054 040 045 Old_age Always In_the_past 46 (0 174 46 28)
anand@ironman:~$ sudo smartctl -H /dev/sdb
smartctl 5.41 2011-06-09 r3365 [x86_64-linux-3.2.0-4-amd64] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
anand@ironman:~$
S.M.A.R.T Info:
Output from smartctl -a -d ata /dev/sda
Output from smartctl -a -d ata /dev/sdb
Update 2:
anand@ironman:~$ sudo blkid -o list
device fs_type label mount point UUID
---------------------------------------------
/dev/sda1 linux_raid_member ironman:0 (in use) cbcb9fb6-f772-7516-9328-d30a0a970c9b
/dev/sda2 linux_raid_member ironman:1 (not mounted) 3f64c0ce-fcb9-ff92-d5fd-68d7844b7e12
/dev/sdb1 linux_raid_member ironman:0 (not mounted) cbcb9fb6-f772-7516-9328-d30a0a970c9b
/dev/sdb2 linux_raid_member ironman:1 (in use) 3f64c0ce-fcb9-ff92-d5fd-68d7844b7e12
/dev/md0 LVM2_member (in use) JKI3Lr-VdDK-Ogsk-KOQk-jSKJ-udAV-Vt4ckP
/dev/md1 LVM2_member (in use) CAqW3D-WJ7g-2lbw-G3cn-nidp-2jdQ-evFe7r
/dev/mapper/vg00-root ext4 root / 82334ff8-3eff-4fc7-9b86-b11eeda314ae
/dev/mapper/vg00-home ext4 home /home 8e9f74dd-08e4-45a3-a492-d4eaf22a1d68
/dev/mapper/vg00-var ext4 var /var 0e798199-3219-458d-81b8-b94a5736f1be
/dev/mapper/vg00-usr ext4 usr /usr d8a335fc-72e6-4b98-985e-65cff08c4e22
/dev/mapper/vg00-swap1 swap <swap> b95ee4ca-fcca-487f-b6ff-d6c0d49426d8
/dev/mapper/vg00-tmp ext4 tmp /tmp c879fae8-bd25-431d-be3e-6120d0381cb8
/dev/mapper/vg_boot-boot ext4 boot /boot 12684df6-6c4a-450f-8ed1-d3149609a149
-- End Update 2
Update 3 - After following Nikita's suggestions:
/dev/md0: │
Version : 1.2 │
Creation Time : Wed May 22 21:00:35 2013 │
Raid Level : raid1 │
Array Size : 998848 (975.60 MiB 1022.82 MB) │
Used Dev Size : 998848 (975.60 MiB 1022.82 MB) │
Raid Devices : 2 │
Total Devices : 2 │
Persistence : Superblock is persistent │
│
Update Time : Fri Oct 22 21:20:09 2021 │
State : clean │
Active Devices : 2 │
Working Devices : 2 │
Failed Devices : 0 │
Spare Devices : 0 │
│
Name : ironman:0 (local to host ironman) │
UUID : cbcb9fb6:f7727516:9328d30a:0a970c9b │
Events : 4478 │
│
Number Major Minor RaidDevice State │
0 8 1 0 active sync /dev/sda1 │
2 8 17 1 active sync /dev/sdb1
anand@ironman:~/.scripts/automatem/bkp$ sudo mdadm -D /dev/md1 │
/dev/md1: │
Version : 1.2 │
Creation Time : Wed May 22 21:00:47 2013 │
Raid Level : raid1 │
Array Size : 487253824 (464.68 GiB 498.95 GB) │
Used Dev Size : 487253824 (464.68 GiB 498.95 GB) │
Raid Devices : 2 │
Total Devices : 2 │
Persistence : Superblock is persistent │
│
Update Time : Fri Oct 22 21:21:37 2021 │
State : clean │
Active Devices : 2 │
Working Devices : 2 │
Failed Devices : 0 │
Spare Devices : 0 │
│
Name : ironman:1 (local to host ironman) │
UUID : 3f64c0ce:fcb9ff92:d5fd68d7:844b7e12 │
Events : 63038935 │
│
Number Major Minor RaidDevice State │
2 8 18 0 active sync /dev/sdb2 │
1 8 34 1 active sync /dev/sdc2
Thank you all!
Anand
