RAID5解放

Tue, 24 Sep 2019 23:52:29 +0900

ReadyNASに構築した6TB×4台で16.5TBのRAIDに無事録画データが移行できたので、WD30EZRx×5構成でRAID5な11TBドライブを解放。

まず/etc/samba/smb.confの共有設定をコメントアウトしたあと、restartしてマウントも解除。

root@GT110b:~# service smbd restart
smbd stop/waiting
smbd start/running, process 8215
root@GT110b:~# umount /mnt/raid
root@GT110b:~#

そしてmdadmでRAIDの停止。

root@GT110b:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid5 sdf[0] sde[5] sdi[4] sdh[2] sdg[1]
11720540160 blocks super 1.2 level 5, 512k chunk, algorithm 2 [5/5] [UUUUU]

unused devices:
root@GT110b:~#
root@GT110b:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Thu Jul 20 23:01:38 2017
Raid Level : raid5
Array Size : 11720540160 (11177.58 GiB 12001.83 GB)
Used Dev Size : 2930135040 (2794.39 GiB 3000.46 GB)
Raid Devices : 5
Total Devices : 5
Persistence : Superblock is persistent

Update Time : Wed Sep 25 01:35:53 2019
State : clean
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0

Layout : left-symmetric
Chunk Size : 512K

Name : GT110b:0 (local to host GT110b)
UUID : 81328295:5f1fa0c2:b3535462:79680794
Events : 388988

Number Major Minor RaidDevice State
0 8 80 0 active sync /dev/sdf
1 8 96 1 active sync /dev/sdg
2 8 112 2 active sync /dev/sdh
4 8 128 3 active sync /dev/sdi
5 8 64 4 active sync /dev/sde
root@GT110b:~#
root@GT110b:~# mdadm --misc --stop /dev/md0
mdadm: stopped /dev/md0
root@GT110b:~#
root@GT110b:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
unused devices:
root@GT110b:~# mdadm --misc --zero-superblock /dev/sd[efghi]
root@GT110b:~#

最後にpartedで

root@GT110b:~# parted /dev/sd[efghi]

とパーティションを削除して終了。

2019/09/24 on Yano's digital garage

RAID5解放