mdadmとRAID5

Tue, 18 Jul 2017 23:56:00 +0900

先週書いたIntel NUCのNICが落ちてしまう件。

懸案だった記憶域プール／スペースの問題はUSB3.0ハブで解消したのだが、結局Intel NUCにサーバ運用は荷が重過ぎると判断し、4SATA HDD はい～るKit Super Turbo 3は素直にgt110bのUSB接続に戻す事に。

折角3TB×4構成なのでmdadmでRaid構築を再確認。まずは普通にpartedで各ドライブに区画を切る。形式は最近のお約束xfsにしておこう。

root@GT110b:~# mdadm --zero-superblock /dev/sde
root@GT110b:~# parted /dev/sde
GNU Parted 2.3
Using /dev/sde
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel gpt
Warning: The existing disk label on /dev/sde will be destroyed and all data on this disk will be lost. Do you want to
continue?
Yes/No? yes
(parted) p
Model: JMicron Generic DISK00 (scsi)
Disk /dev/sde: 3001GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt

Number Start End Size File system Name Flags

(parted) unit GB
(parted) mkpart DISK00 xfs 1 -1
(parted) set 1 raid on
(parted) unit s
(parted) p
Model: JMicron Generic DISK00 (scsi)
Disk /dev/sde: 5860533168s
Sector size (logical/physical): 512B/4096B
Partition Table: gpt

Number Start End Size File system Name Flags
1 2048s 5860532223s 5860530176s xfs DISK00 raid

(parted) q
Information: You may need to update /etc/fstab.

root@GT110b:~# mkfs.xfs -f /dev/sde1
meta-data=/dev/sde1 isize=256 agcount=32, agsize=22892696 blks
= sectsz=4096 attr=2, projid32bit=0
data = bsize=4096 blocks=732566272, imaxpct=5
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal log bsize=4096 blocks=357698, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
root@GT110b:~#

/dev/sdf～sdhに対しても同じくmdadm、parted、mkfs.xfsを実施。

2017/07/18 on Yano's digital garage

mdadmとRAID5