cannot remove mistakenly added md spare drive
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T. Sch.
Sep 14, 2021, 12:12:57 PM9/14/21
to esos-users
Dear Marc,
Want to remove this spare drive without loosing data on it.
6 9 127 - faulty /dev/md/NAS02.ad.fxxxxxxx.de:array1
[root@NAS02 ~]# mdadm -D /dev/md127
/dev/md127:
Version : 1.2
Creation Time : Sat Mar 9 17:19:08 2019
Raid Level : raid5
Array Size : 5860150464 (5588.67 GiB 6000.79 GB)
Used Dev Size : 1953383488 (1862.89 GiB 2000.26 GB)
Raid Devices : 4
Total Devices : 6
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Tue Sep 14 16:50:04 2021
State : active, resyncing (PENDING)
Active Devices : 4
Working Devices : 5
Failed Devices : 1
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 64K
Name : NAS02.ad.fxxxxxxx.de:array1 (local to host NAS02.ad.fxxxxxxx.de)
UUID : 170e51f2:519e46b7:486cebcb:d8bf553a
Events : 3726
Number Major Minor RaidDevice State
0 8 48 0 active sync /dev/sdd
1 8 16 1 active sync /dev/sdb
2 8 32 2 active sync /dev/sdc
4 8 0 3 active sync /dev/sda
5 8 64 - spare /dev/sde
6 9 127 - faulty /dev/md/NAS02.ad.fxxxxxxx.de:array1
Is there any way out? It is (of course) very urgent for the customer.
I don't even know where to or how to start.
I hope so much for your help
greets Thomas
I don't even know where to or how to start.
I hope so much for your help
greets Thomas
T. Sch.
Sep 14, 2021, 12:22:34 PM9/14/21
to esos-users
- I set the "
faulty " state manually by using mdadm
- also tried to remove the device by using "Software RAID" -> "Remove Device"
but nothing happens (GUI "hangs" / does not respond any more...)
this was the way I added the device inadvertently before
- also tried to remove the device by using "Software RAID" -> "Remove Device"
but nothing happens (GUI "hangs" / does not respond any more...)
this was the way I added the device inadvertently before
Marc Smith
Sep 17, 2021, 10:34:54 AM9/17/21
to esos-...@googlegroups.com
If the device is marked as a "spare" then why can't it be removed? The
array is operational on the other devices?
If so, you should be able to remove the spare device like this: mdadm
/dev/mdXXX --remove /dev/SPARE
Of course replacing 'mdXXX' with the array block device and 'SPARE'
with the spare device.
--Marc
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array is operational on the other devices?
If so, you should be able to remove the spare device like this: mdadm
/dev/mdXXX --remove /dev/SPARE
Of course replacing 'mdXXX' with the array block device and 'SPARE'
with the spare device.
--Marc
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> To unsubscribe from this group and stop receiving emails from it, send an email to esos-users+...@googlegroups.com.
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T. Sch.
Sep 20, 2021, 3:12:34 AM9/20/21
to esos-users
yes, that is exactly my question " If the device is marked as a "spare" then why can't it be removed? ".
I just tried this command:
I just tried this command:
mdadm /dev/md127 --remove /dev/md/NAS02.ad.fxxxxxxx.de\:array1
and nothing happens over hours / days. I can only stop this command by pressing Ctrl+C.
May be this is blocking the remove?:
and nothing happens over hours / days. I can only stop this command by pressing Ctrl+C.
May be this is blocking the remove?:
[root@NAS02 ~]# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md127 : active raid5 md127[6](S) sda[4] sdd[0] sdc[2] sde[5](S) sdb[1]
5860150464 blocks super 1.2 level 5, 64k chunk, algorithm 2 [4/4] [UUUU]
[>....................] resync = 0.0% (8564/1953383488) finish=1653140620.8min speed=0K/sec
bitmap: 1/15 pages [4KB], 65536KB chunk
unused devices: <none>
..or perhaps something else?
..or perhaps something else?
Marc Smith
Sep 22, 2021, 8:23:01 AM9/22/21
to esos-...@googlegroups.com
Ah, I see... your MD RAID array is also a member device (circular)!?
Haven't seen something like that before! If it were me, I'd try
stopping/starting the array and see what happens. Might be worth to
look through the 'linux-raid' mailing list for advice too (maybe first
before stopping it).
--Marc
> To view this discussion on the web visit https://groups.google.com/d/msgid/esos-users/10aec42d-f3c3-4fb9-b48e-68a8005bfe19n%40googlegroups.com.
Haven't seen something like that before! If it were me, I'd try
stopping/starting the array and see what happens. Might be worth to
look through the 'linux-raid' mailing list for advice too (maybe first
before stopping it).
--Marc
T. Sch.
Sep 29, 2021, 9:58:41 AM9/29/21
to esos-users
solved it like this:
shut down the esos machine with ther "circular" mess
created a new esos usb key
started the esos machine with the new key
md-raid was there with all data and no second Spare
I lost all other settings, but was able to recreate network and scst an Targets aso. manually
What do you think: May be there is a way via the TUI and / or other settings (.conf's) to prevent
such stupid admins as me to add existing scst devices to software raid arrays?
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