Hi All,
I've 5 disks array 3TB each, but one of the disks /dev/sdb can't be recognized.
Using mdadm - v3.4 - 28th January 2016 on Debian GNU/Linux 9.11 (stretch).
So, I tried to assemble the array with 4 disks, but it didn't work, see below:
sudo mdadm --assemble --verbose /dev/md0 /dev/sd[acde]
mdadm: looking for devices for /dev/md0
mdadm: /dev/sda is identified as a member of /dev/md0, slot 0.
mdadm: /dev/sdc is identified as a member of /dev/md0, slot 2.
mdadm: /dev/sdd is identified as a member of /dev/md0, slot 3.
mdadm: /dev/sde is identified as a member of /dev/md0, slot 4.
mdadm: ignoring /dev/sdc as it reports /dev/sda as failed
mdadm: ignoring /dev/sdd as it reports /dev/sda as failed
mdadm: ignoring /dev/sde as it reports /dev/sda as failed
mdadm: no uptodate device for slot 1 of /dev/md0
mdadm: no uptodate device for slot 2 of /dev/md0
mdadm: no uptodate device for slot 3 of /dev/md0
mdadm: no uptodate device for slot 4 of /dev/md0
mdadm: added /dev/sda to /dev/md0 as 0
mdadm: /dev/md0 assembled from 1 drive - not enough to start the array.
Also tried to get more details and noticed some inconsistencies
related to update times, etc:
# mdadm --examine /dev/sd[acde]
/dev/sda:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 90dee075:e0f72577:2bc039c0:a6287075
Name : andromedabr:0 (local to host andromedabr)
Creation Time : Thu Nov 21 00:37:08 2019
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 5860271024 (2794.39 GiB 3000.46 GB)
Array Size : 11720540160 (11177.58 GiB 12001.83 GB)
Used Dev Size : 5860270080 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=944 sectors
State : clean
Device UUID : 4cc19a0b:912f64bb:f51c74bf:abace527
Update Time : Mon Jul 12 21:16:46 2021
Checksum : 79ab8eb2 - correct
Events : 600481
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdc:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 90dee075:e0f72577:2bc039c0:a6287075
Name : andromedabr:0 (local to host andromedabr)
Creation Time : Thu Nov 21 00:37:08 2019
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 5860271024 (2794.39 GiB 3000.46 GB)
Array Size : 11720540160 (11177.58 GiB 12001.83 GB)
Used Dev Size : 5860270080 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=944 sectors
State : active
Device UUID : 35e0f4ea:89dfbd34:051ee297:d22e25b7
Update Time : Fri Oct 15 09:27:03 2021
Checksum : 3a8a6dd3 - correct
Events : 597632
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : .AAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdd:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 90dee075:e0f72577:2bc039c0:a6287075
Name : andromedabr:0 (local to host andromedabr)
Creation Time : Thu Nov 21 00:37:08 2019
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 5860271024 (2794.39 GiB 3000.46 GB)
Array Size : 11720540160 (11177.58 GiB 12001.83 GB)
Used Dev Size : 5860270080 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=944 sectors
State : clean
Device UUID : 1ac77da2:86d63b86:5ad27b38:7c6555de
Update Time : Fri Oct 15 11:13:37 2021
Checksum : b5c5acd - correct
Events : 600481
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : .A.AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sde:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 90dee075:e0f72577:2bc039c0:a6287075
Name : andromedabr:0 (local to host andromedabr)
Creation Time : Thu Nov 21 00:37:08 2019
Raid Level : raid5
Raid Devices : 5
Avail Dev Size : 5860271024 (2794.39 GiB 3000.46 GB)
Array Size : 11720540160 (11177.58 GiB 12001.83 GB)
Used Dev Size : 5860270080 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=944 sectors
State : clean
Device UUID : 5d468b76:81c27d1b:455adc02:2545ccee
Update Time : Fri Oct 15 11:13:37 2021
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 4f8b2de7 - correct
Events : 600481
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : .A.AA ('A' == active, '.' == missing, 'R' == replacing)
Please, let me know if there is anything I can do to fix this issue.
Thanks,
Romulo.
