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# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Mon May 13 13:12:06 2019
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=99bb66eb-7f11-4bf0-8668-c38aec73487a / ext4 defaults 1 1
UUID=da159c04-63c5-45c4-bec9-ce83ccadf52f swap swap defaults 0 0
#
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# blkid | egrep "md126|md127"
/dev/md126: UUID="99bb66eb-7f11-4bf0-8668-c38aec73487a" TYPE="ext4"
/dev/md127: UUID="da159c04-63c5-45c4-bec9-ce83ccadf52f" TYPE="swap"
#
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# 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
#
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# 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>
#
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# 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
#
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# 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
#
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# swapon -s
Filename Type Size Used Priority
/dev/md127 partition 16775164 0 -2
# swapoff -a
# swapon -s
#
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# mdadm --manage /dev/md/LABELime-swap --stop
mdadm: stopped /dev/md/LABELime-swap
#
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# 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
#
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# mdadm --zero-superblock /dev/sdb2
# mdadm --zero-superblock /dev/sdb1
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# 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).)
#
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# 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.
#
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# sed -i '/LABELime-swap/d' /etc/mdadm.conf
# mdadm --detail --scan | grep LABELime-swap >> /etc/mdadm.conf
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# mdadm --manage /dev/md/LABELime-boot --add /dev/sdb2
mdadm: added /dev/sdb2
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# cat /proc/mdstat
Personalities : [raid1] [raid0]
md127 : active raid0 sdb1[1] sda1[0]
16775168 blocks super 1.2 512k chunks
md126 : active raid1 sdb2[2] sda2[0]
968231936 blocks super 1.2 [2/1] [U_]
[=>...................] recovery = 9.4% (91276288/968231936) finish=151.5min speed=96443K/sec
bitmap: 4/8 pages [16KB], 65536KB chunk
unused devices: <none>
#
what am I doing wrong?