Hi All,
i have a Raid 5 with 6 - 3 TB Devices. After a powerfailure raid
didn't assemble automaticcaly so i force assembled it with
mdadm --assemble --force --verbose /dev/md0 /dev/sd[abcdej]1
root@nas:~# mdadm --assemble --force --verbose /dev/md0 /dev/sd[abcdej]1
mdadm: looking for devices for /dev/md0
mdadm: /dev/sda1 is identified as a member of /dev/md0, slot 2.
mdadm: /dev/sdb1 is identified as a member of /dev/md0, slot 5.
mdadm: /dev/sdc1 is identified as a member of /dev/md0, slot 4.
mdadm: /dev/sdd1 is identified as a member of /dev/md0, slot 0.
mdadm: /dev/sde1 is identified as a member of /dev/md0, slot 3.
mdadm: /dev/sdj1 is identified as a member of /dev/md0, slot 1.
mdadm: forcing event count in /dev/sde1(3) from 101607 upto 101616
mdadm: forcing event count in /dev/sdc1(4) from 101607 upto 101616
mdadm: forcing event count in /dev/sdb1(5) from 101607 upto 101616
mdadm: clearing FAULTY flag for device 4 in /dev/md0 for /dev/sde1
mdadm: clearing FAULTY flag for device 2 in /dev/md0 for /dev/sdc1
mdadm: clearing FAULTY flag for device 1 in /dev/md0 for /dev/sdb1
mdadm: Marking array /dev/md0 as 'clean'
mdadm: added /dev/sdd1 to /dev/md0 as 0 (possibly out of date)
mdadm: added /dev/sda1 to /dev/md0 as 2
mdadm: added /dev/sde1 to /dev/md0 as 3
mdadm: added /dev/sdc1 to /dev/md0 as 4
mdadm: added /dev/sdb1 to /dev/md0 as 5
mdadm: added /dev/sdj1 to /dev/md0 as 1
mdadm: /dev/md0 assembled from 5 drives - not enough to start the array.
So /dev/sdd1 was considered , when i ran the command again the raid
assembled without sdd1
When i tried Reading Data after a while it stopped (propably when the
data was on /dev/sdc
dmesg showed this:
[ 368.433658] sd 8:0:0:1: [sdc] tag#0 FAILED Result: hostbyte=DID_OK
driverbyte=DRIVER_SENSE
[ 368.433664] sd 8:0:0:1: [sdc] tag#0 Sense Key : Medium Error [current]
[ 368.433669] sd 8:0:0:1: [sdc] tag#0 Add. Sense: Unrecovered read error
[ 368.433675] sd 8:0:0:1: [sdc] tag#0 CDB: Read(16) 88 00 00 00 00 00
00 08 81 d8 00 00 00 08 00 00
[ 368.433679] blk_update_request: critical medium error, dev sdc, sector 557528
[ 368.433689] raid5_end_read_request: 77 callbacks suppressed
[ 368.433692] md/raid:md0: read error not correctable (sector 555480 on sdc1).
[ 375.944254] sd 8:0:0:1: [sdc] tag#0 FAILED Result: hostbyte=DID_OK
driverbyte=DRIVER_SENSE
and the Raided stopped again.
How can i force to assemble the raid including /dev/sdd1 and not
include /dev/sdc (because that drive is possibly damaged now)?
With a mdadm --create --assume-clean .. command?
I'm using mdadm/zesty-updates,now 3.4-4ubuntu0.1 amd64 [installed] on
Linux version 4.10.0-21-generic (buildd@lgw01-12) (gcc version 6.3.0
20170406 (Ubuntu 6.3.0-12ubuntu2) )
Regards and thanks in advance
Few other Ouputs:
mdadm --examine /dev/sd[abcdej]1 | egrep 'Event|/dev/sd'
/dev/sda1:
Events : 101616
/dev/sdb1:
Events : 101616
/dev/sdc1:
Events : 101616
/dev/sdd1:
Events : 101607
/dev/sde1:
Events : 101616
/dev/sdj1:
Events : 101616
mdadm --examine /dev/sd[abcdej]1
/dev/sda1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 8f33f56c:efd27830:4ac273aa:94b79171
Name : htpc:0
Creation Time : Thu Jan 16 20:36:01 2014
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5860268032 (2794.39 GiB 3000.46 GB)
Array Size : 14650667520 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860267008 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=1024 sectors
State : clean
Device UUID : e41b2a30:94a9fa78:9b8e021d:ddb50b84
Update Time : Wed Nov 17 11:47:36 2021
Checksum : 7f1551a8 - correct
Events : 101616
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : .AA... ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 8f33f56c:efd27830:4ac273aa:94b79171
Name : htpc:0
Creation Time : Thu Jan 16 20:36:01 2014
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5860268032 (2794.39 GiB 3000.46 GB)
Array Size : 14650667520 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860267008 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=1024 sectors
State : clean
Device UUID : d32f3e56:ab5c727d:53de3db9:e0bfadee
Update Time : Wed Nov 17 11:47:19 2021
Checksum : b08f725a - correct
Events : 101616
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 5
Array State : AAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdc1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 8f33f56c:efd27830:4ac273aa:94b79171
Name : htpc:0
Creation Time : Thu Jan 16 20:36:01 2014
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5860268032 (2794.39 GiB 3000.46 GB)
Array Size : 14650667520 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860267008 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=1024 sectors
State : clean
Device UUID : 23fc5428:02411e8f:ad843649:d8addbd0
Update Time : Wed Nov 17 11:47:19 2021
Checksum : 678b755 - correct
Events : 101616
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdd1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x2
Array UUID : 8f33f56c:efd27830:4ac273aa:94b79171
Name : htpc:0
Creation Time : Thu Jan 16 20:36:01 2014
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5860268032 (2794.39 GiB 3000.46 GB)
Array Size : 14650667520 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860267008 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Recovery Offset : 0 sectors
Unused Space : before=262056 sectors, after=1024 sectors
State : clean
Device UUID : 09baa98d:5456baf2:925a9555:5b650e7f
Update Time : Wed Nov 17 11:47:19 2021
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 8a031835 - correct
Events : 101607
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sde1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 8f33f56c:efd27830:4ac273aa:94b79171
Name : htpc:0
Creation Time : Thu Jan 16 20:36:01 2014
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5860268032 (2794.39 GiB 3000.46 GB)
Array Size : 14650667520 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860267008 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=1024 sectors
State : clean
Device UUID : bb060f08:741f38fd:6006b07e:f0a9c992
Update Time : Wed Nov 17 11:47:19 2021
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 4bbc1e74 - correct
Events : 101616
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : AAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdj1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 8f33f56c:efd27830:4ac273aa:94b79171
Name : htpc:0
Creation Time : Thu Jan 16 20:36:01 2014
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 5860268032 (2794.39 GiB 3000.46 GB)
Array Size : 14650667520 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860267008 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=1024 sectors
State : clean
Device UUID : d5227db1:d9bde1c4:7b0fe2f1:4eccbbf0
Update Time : Wed Nov 17 11:47:36 2021
Checksum : 8df1042c - correct
Events : 101616
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : .AAAAA ('A' == active, '.' == missing, 'R' == replacing)
