替换软件RAID上的启动驱动器后，CentOS 7节点无法启动
已按照以下步骤更换了阵列中的驱动器：-
猫/ etc / fstab
<table mat-table class="mat-elevation-z8" *ngIf="showtable">
<!-- in $tablehead is a array for each column header cell
e.g [Date,Time,User]
-->
<ng-container *ngFor="let head of $tableHead">
<th mat-header-cell *matHeaderCellDef>{{head}}</th>
</ng-container>
<!-- in $tableContent is a array for each cell per row
e.g [2019-05-14,14:00,Peter],
[2019-03-14,13:00,Emersson]
-->
<ng-container *ngFor="let row of $tableContent">
<ng-container *ngFor="let cell of row">
<td mat-cell *matCellDef="let cell">{{cell}}</td>
</ng-container>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
</table>
blkid
# cat /etc/fstab
UUID=99bb66eb-7f11-4bf0-8668-c38aec73487a / ext4 defaults 1 1
UUID=da159c04-63c5-45c4-bec9-ce83ccadf52f swap swap defaults 0 0
cat / proc / mdstat
# blkid | egrep "md126|md127"
/dev/md126: UUID="99bb66eb-7f11-4bf0-8668-c38aec73487a" TYPE="ext4"
/dev/md127: UUID="da159c04-63c5-45c4-bec9-ce83ccadf52f" TYPE="swap"
#
# cat /etc/mdadm.conf
# mdadm.conf written out by anaconda
MAILADDR root
AUTO +imsm +1.x -all
ARRAY /dev/md/LABELime-boot level=raid1 num-devices=2 UUID=ad9fb443:25747435:88919c76:bbdf9159
ARRAY /dev/md/LABELime-swap level=raid0 num-devices=2 UUID=aab47aa5:d1a284ab:2ae13ea7:1b828b5c
#
mdadm --detail / dev / md / LABELime-boot
# cat /proc/mdstat
Personalities : [raid1] [raid0]
md126 : active raid1 sdb2[1] sda2[0]
968231936 blocks super 1.2 [2/2] [UU]
bitmap: 4/8 pages [16KB], 65536KB chunk
md127 : active raid0 sdb1[1] sda1[0]
16775168 blocks super 1.2 512k chunks
unused devices: <none>
#
mdadm --detail / dev / md / LABELime-swap
# mdadm --detail /dev/md/LABELime-boot
/dev/md/LABELime-boot:
Version : 1.2
Creation Time : Mon May 13 09:11:47 2019
Raid Level : raid1
Array Size : 968231936 (923.38 GiB 991.47 GB)
Used Dev Size : 968231936 (923.38 GiB 991.47 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Mon May 13 22:48:19 2019
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Consistency Policy : bitmap
Name : LABELime-boot
UUID : ad9fb443:25747435:88919c76:bbdf9159
Events : 12140
Number Major Minor RaidDevice State
0 8 2 0 active sync /dev/sda2
1 8 18 1 active sync /dev/sdb2
#
关闭交换
# mdadm --detail /dev/md/LABELime-swap
/dev/md/LABELime-swap:
Version : 1.2
Creation Time : Mon May 13 09:11:59 2019
Raid Level : raid0
Array Size : 16775168 (16.00 GiB 17.18 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon May 13 09:11:59 2019
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Chunk Size : 512K
Consistency Policy : none
Name : LABELime-swap
UUID : aab47aa5:d1a284ab:2ae13ea7:1b828b5c
Events : 0
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
#
mdadm --manage / dev / md / LABELime-swap --stop
# swapon -s
Filename Type Size Used Priority
/dev/md127 partition 16775164 0 -2
# swapoff -a
# swapon -s
#
mdadm --manage / dev / md / LABELime-boot --fail / dev / sdb2
# mdadm --manage /dev/md/LABELime-swap --stop
mdadm: stopped /dev/md/LABELime-swap
#
创建交换数组
# mdadm --manage /dev/md/LABELime-boot --fail /dev/sdb2
mdadm: set /dev/sdb2 faulty in /dev/md/LABELime-boot
[root@sn19 ~]# mdadm --manage /dev/md/LABELime-boot --remove /dev/sdb2
mdadm: hot removed /dev/sdb2 from /dev/md/LABELime-boot
#
# mdadm --zero-superblock /dev/sdb2
# mdadm --zero-superblock /dev/sdb1
# sfdisk -d /dev/sda | sfdisk --force /dev/sdb
Checking that no-one is using this disk right now ...
OK
Disk /dev/sdb: 121601 cylinders, 255 heads, 63 sectors/track
Old situation:
Units: cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/sdb1 0 - 0 0 0 Empty
/dev/sdb2 0 - 0 0 0 Empty
/dev/sdb3 0 - 0 0 0 Empty
/dev/sdb4 0 - 0 0 0 Empty
New situation:
Units: sectors of 512 bytes, counting from 0
Device Boot Start End #sectors Id System
/dev/sdb1 2048 16795647 16793600 fd Linux raid autodetect
/dev/sdb2 * 16795648 1953523711 1936728064 fd Linux raid autodetect
/dev/sdb3 0 - 0 0 Empty
/dev/sdb4 0 - 0 0 Empty
Warning: partition 1 does not end at a cylinder boundary
Warning: partition 2 does not start at a cylinder boundary
Warning: partition 2 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).)
#
mdadm --manage / dev / md / LABELime-boot --add / dev / sdb2
# mdadm -Cv /dev/md/LABELime-swap -l0 -n2 --name=LABELime-swap -R /dev/sda1 /dev/sdb1
mdadm: chunk size defaults to 512K
mdadm: /dev/sda1 appears to be part of a raid array:
level=raid0 devices=2 ctime=Mon May 13 09:11:59 2019
mdadm: creation continuing despite oddities due to --run
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md/LABELime-swap started.
#
# sed -i '/LABELime-swap/d' /etc/mdadm.conf
# mdadm --detail --scan | grep LABELime-swap >> /etc/mdadm.conf
cat / proc / mdstat
# mdadm --manage /dev/md/LABELime-boot --add /dev/sdb2
mdadm: added /dev/sdb2
成功重建后，我试图重新引导服务器，但是卡住了。附有screeshot。