- 追加された行はこのように表示されます。
- 削除された行は
このように表示されます。
*md-RAID 修復
*5台ミラーを4台ミラーに変更
*1台追加予定
!md から故障ディスクを除去
*ルートファイルシステム /dev/md0
[root@c2q nonaka]# df /
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/md0 20512508 10878964 9423864 54% /
*スワップ /dev/md1
[root@c2q nonaka]# cat /proc/swaps
Filename Type Size Used Priority
/dev/md1 partition 523964 434904 -1
*故障ディスク
[root@c2q nonaka]# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdg1[4] sdc1[9] sdd1[11] sda1[12]
20971392 blocks super 1.0 [5/4] [_UUUU]
bitmap: 1/1 pages [4KB], 65536KB chunk
md1 : active raid1 sdg2[8] sdc2[10] sdd2[11] sda2[13]
523968 blocks super 1.1 [5/4] [U_UUU]
unused devices: <none>
[root@c2q nonaka]# mdadm --grow /dev/md1 -n4
raid_disks for /dev/md1 set to 4
[root@c2q nonaka]# mdadm --grow /dev/md0 -n4
raid_disks for /dev/md0 set to 4
[root@c2q nonaka]# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdg1[4] sdc1[9] sdd1[11] sda1[12]
20971392 blocks super 1.0 [4/4] [UUUU]
bitmap: 1/1 pages [4KB], 65536KB chunk
md1 : active raid1 sdg2[8] sdc2[10] sdd2[11] sda2[13]
523968 blocks super 1.1 [4/4] [UUUU]
unused devices: <none>
!2台 追加
[root@c2q nonaka]# ( hdparm -I /dev/sdi ; hdparm -I /dev/sdk ) | grep -e /dev/ -e Model -e GB
/dev/sdi:
Model Number: TOSHIBA DT01ACA200
device size with M = 1000*1000: 2000398 MBytes (2000 GB)
/dev/sdk:
Model Number: ST6000DM003-2CY186
device size with M = 1000*1000: 6001175 MBytes (6001 GB)
*2T と 6T を追加
*マザーボードが旧タイプのため 2T からしか起動できない。
*2T をRAID1に組み込む
*6T は全領域をデータ用に利用
!2Tを追加
*他の2Tディスクからパーティションテーブルをコピー
sfdisk -d /dev/sda | sfdisk /dev/sdi
*https://unix.stackexchange.com/questions/12986/how-to-copy-the-partition-layout-of-a-whole-disk-using-standard-tools
*警告発生
[root@c2q nonaka]# sfdisk -d /dev/sda | sfdisk /dev/sdi
Checking that no-one is using this disk right now ...
OK
Disk /dev/sdi: 243201 cylinders, 255 heads, 63 sectors/track
/dev/sdi: unrecognized partition table type
Old situation:
No partitions found
New situation:
Units = sectors of 512 bytes, counting from 0
Device Boot Start End #sectors Id System
/dev/sdi1 * 2048 41945087 41943040 fd Linux raid autodetect
/dev/sdi2 41945088 42993663 1048576 fd Linux raid autodetect
/dev/sdi3 42993664 3907029167 3864035504 8e Linux LVM
/dev/sdi4 0 - 0 0 Empty
Warning: partition 1 does not end at a cylinder boundary
sfdisk: I don't like these partitions - nothing changed.
(If you really want this, use the --force option.)
*https://unix.stackexchange.com/questions/155942/sfdisk-dont-like-partitions-want-to-dump-another-hard-drive-to-restore-softwa
""The requirement to align to cylinder boundaries has been gone for a long time now.
""シリンダ境界に合わせる制限は過去の遺物です。
*警告を無視して強制実行
[root@c2q nonaka]# sfdisk -d /dev/sda | sfdisk --force /dev/sdi
Checking that no-one is using this disk right now ...
OK
Disk /dev/sdi: 243201 cylinders, 255 heads, 63 sectors/track
/dev/sdi: unrecognized partition table type
Old situation:
No partitions found
New situation:
Units = sectors of 512 bytes, counting from 0
Device Boot Start End #sectors Id System
/dev/sdi1 * 2048 41945087 41943040 fd Linux raid autodetect
/dev/sdi2 41945088 42993663 1048576 fd Linux raid autodetect
/dev/sdi3 42993664 3907029167 3864035504 8e Linux LVM
/dev/sdi4 0 - 0 0 Empty
Warning: partition 1 does not end at a cylinder boundary
Successfully wrote the new partition table
Re-reading the partition table ...
If you created or changed a DOS partition, /dev/foo7, say, then use dd(1)
to zero the first 512 bytes: dd if=/dev/zero of=/dev/foo7 bs=512 count=1
(See fdisk(8).)
*ルートファイルシステムのパーティション md0 に /dev/sdi0 を追加
*スワップのパーティション md1 に /dev/sdi1 を追加
*作業前
[root@c2q nonaka]# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdg1[4] sdc1[9] sdd1[11] sda1[12]
20971392 blocks super 1.0 [4/4] [UUUU]
bitmap: 1/1 pages [4KB], 65536KB chunk
md1 : active raid1 sdg2[8] sdc2[10] sdd2[11] sda2[13]
523968 blocks super 1.1 [4/4] [UUUU]
unused devices: <none>
*md0 作業
mdadm --grow /dev/md0 --raid-devices=5 --add=/dev/sdi0
[root@c2q nonaka]# mdadm --grow /dev/md0 --raid-devices=5 --add /dev/sdi1
mdadm: added /dev/sdi1
raid_disks for /dev/md0 set to 5
[root@c2q nonaka]# mdadm --grow /dev/md1 --raid-devices=5 --add /dev/sdi2
mdadm: added /dev/sdi2
raid_disks for /dev/md1 set to 5
*作業後ミラー中
[root@c2q nonaka]# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdi1[5] sdg1[4] sdc1[9] sdd1[11] sda1[12]
20971392 blocks super 1.0 [5/4] [UUUU_]
[==>..................] recovery = 10.9% (2291200/20971392) finish=5.4min speed=57329K/sec
bitmap: 1/1 pages [4KB], 65536KB chunk
md1 : active raid1 sdi2[4] sdg2[8] sdc2[10] sdd2[11] sda2[13]
523968 blocks super 1.1 [5/4] [UUUU_]
resync=DELAYED
*作業後ミラー完了
[root@c2q nonaka]# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdi1[5] sdg1[4] sdc1[9] sdd1[11] sda1[12]
20971392 blocks super 1.0 [5/5] [UUUUU]
bitmap: 1/1 pages [4KB], 65536KB chunk
md1 : active raid1 sdi2[4] sdg2[8] sdc2[10] sdd2[11] sda2[13]
523968 blocks super 1.1 [5/5] [UUUUU]
!6Tを追加
*6T は丸ごとデータ
*参考
[root@c2q nonaka]# parted /dev/sdb print
Model: ATA TOSHIBA MD04ACA4 (scsi)
Disk /dev/sdb: 4001GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 4001GB 4001GB primary lvm
*実行
[root@c2q nonaka]# parted /dev/sdk mklabel gpt
Information: You may need to update /etc/fstab.
[root@c2q nonaka]# parted /dev/sdk mkpart primary 1 100%
Information: You may need to update /etc/fstab.
[root@c2q nonaka]# parted /dev/sdk set 1 lvm on
Information: You may need to update /etc/fstab.
*確認
[root@c2q nonaka]# parted /dev/sdk print
Model: ATA ST6000DM003-2CY1 (scsi)
Disk /dev/sdk: 6001GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 6001GB 6001GB primary lvm
*LVM に 6T を追加
[root@c2q nonaka]# pvcreate /dev/sdk1
Physical volume "/dev/sdk1" successfully created
[root@c2q nonaka]# vgs
VG #PV #LV #SN Attr VSize VFree
vg_data 7 1 0 wz--n- 13.78t 3.27t
[root@c2q nonaka]# vgextend vg_data /dev/sdk1
Volume group "vg_data" successfully extended
[root@c2q nonaka]# vgs
VG #PV #LV #SN Attr VSize VFree
vg_data 8 1 0 wz--n- 19.24t 8.73t