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Auf dem root-Server die Platte platt machen

erst mal schaun, was noch da ist :
root@grml ~ # mdadm --detail --scan
ARRAY /dev/md/2 metadata=1.0 name=any:2 UUID=54289a6b:662e4b17:1c386489:6405f578
ARRAY /dev/md/1 metadata=1.0 name=any:1 UUID=cc32f60d:da3320f2:16990c05:0b6fa77d
ARRAY /dev/md/0 metadata=1.0 name=any:0 UUID=0ab0005c:f4e003a1:4c63d6ca:0162ef6c

root@grml ~ # ls -l /dev/disk/by-uuid
total 0
lrwxrwxrwx 1 root root 9 Jan 15 07:28 652a2a86-65cb-425c-9760-bba641245f0d -> ../../md2
lrwxrwxrwx 1 root root 9 Jan 15 07:28 77506b7e-c0d2-4712-8461-e94f0ffe1c78 -> ../../md1
lrwxrwxrwx 1 root root 9 Jan 15 07:28 f735ff65-bc3c-4685-b987-204b3a5a97aa -> ../../md0

root@grml ~ # mdadm --stop /dev/md0
mdadm: stopped /dev/md0
root@grml ~ # mdadm --stop /dev/md1
mdadm: stopped /dev/md1
root@grml ~ # mdadm --stop /dev/md2
mdadm: stopped /dev/md2

root@grml ~ # mdadm --zero-superblock /dev/sda3 /dev/sdb3
root@grml ~ # mdadm --zero-superblock /dev/sda2 /dev/sdb2
root@grml ~ # mdadm --zero-superblock /dev/sda1 /dev/sdb1

root@grml ~ # blkid
/dev/sda1: PTUUID="e52ec6bf" PTTYPE="dos" PARTUUID="00032cd8-01"
/dev/sdb1: PARTUUID="000e29e1-01"

es ist jetzt also alles weg

root@grml ~ # blkid -o list
device                                     fs_type        label           mount point                                    UUID
-------------------------------------------------------------------------------------------------------------------------------------------------------------
/dev/sda1                                                                 (not mounted)
/dev/sda2                                                                 (not mounted)
/dev/sda3                                                                 (not mounted)

/dev/sdb1                                                                 (not mounted)
/dev/sdb2                                                                 (not mounted)
/dev/sdb3                                                                 (not mounted)

.

die 3 Raid1 Partitionen erzeugen

das sind die 3 Befehle:
mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sda1 /dev/sdb1 --metadata=1.0 -N any:0
mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/sda2 /dev/sdb2 --metadata=1.0 -N any:1
mdadm --create /dev/md2 --level=1 --raid-devices=2 /dev/sda3 /dev/sdb3 --metadata=1.0 -N any:2


root@grml ~ # mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sda1 /dev/sdb1 --metadata=1.0 -N any:0                                             :(
mdadm: /dev/sda1 appears to be part of a raid array:
       level=raid0 devices=0 ctime=Thu Jan  1 00:00:00 1970
Continue creating array? y
mdadm: array /dev/md0 started.

root@grml ~ # mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/sda2 /dev/sdb2 --metadata=1.0 -N any:1                                             :(
mdadm: array /dev/md1 started.

root@grml ~ # mdadm --create /dev/md2 --level=1 --raid-devices=2 /dev/sda3 /dev/sdb3 --metadata=1.0 -N any:2
mdadm: array /dev/md2 started.

root@grml ~ # blkid
/dev/sda1: UUID="144c71f9-edb0-bf56-1f90-6a459683edce" UUID_SUB="327e58c0-c1ae-3d4b-61e7-813422f73e87" LABEL="any:0" TYPE="linux_raid_member" PARTUUID="00032cd8-01"
/dev/sda2: UUID="2c8c7bae-5ff4-d738-fb75-bcf93cb4a6d6" UUID_SUB="283e5a76-632f-40c3-6c47-c8f63fab628a" LABEL="any:1" TYPE="linux_raid_member" PARTUUID="00032cd8-02"
/dev/sda3: UUID="29ece338-4dfa-cc16-4512-233506a87de1" UUID_SUB="a03a9a51-36e6-5f5f-48ae-cd94a7300ca0" LABEL="any:2" TYPE="linux_raid_member" PARTUUID="00032cd8-03"

/dev/sdb1: UUID="144c71f9-edb0-bf56-1f90-6a459683edce" UUID_SUB="c80957ad-ffb5-ea0a-ba46-1588f008927a" LABEL="any:0" TYPE="linux_raid_member" PARTUUID="000e29e1-01"
/dev/sdb2: UUID="2c8c7bae-5ff4-d738-fb75-bcf93cb4a6d6" UUID_SUB="980eafc4-1cc3-530d-6cbb-ad020399b3de" LABEL="any:1" TYPE="linux_raid_member" PARTUUID="000e29e1-02"
/dev/sdb3: UUID="29ece338-4dfa-cc16-4512-233506a87de1" UUID_SUB="1ed75269-2ccb-742c-6efe-9c857d80797e" LABEL="any:2" TYPE="linux_raid_member" PARTUUID="000e29e1-03"

/dev/md0p1: LABEL="any:0" UUID="c237746c-5504-4301-96ab-94dd95b0da6b" TYPE="swap" PARTUUID="e52ec6bf-01"
/dev/md1p1: LABEL="any:1" UUID="419273e2-675e-486a-9387-7ad1305bcedb" TYPE="ext4" PARTUUID="e44dc355-01"
/dev/md2p1: LABEL="any:2" UUID="982c030c-6da0-4adb-80fc-04af9bdfee6b" TYPE="ext4" PARTUUID="1859f603-01"

/dev/sda5: UUID="a6fd1988-87a3-429b-9292-60833d72497a" TYPE="ext4" PARTUUID="00032cd8-05"
/dev/sdb5: UUID="4616245c-0306-4a0e-8d90-d31778f8999c" TYPE="ext4" PARTUUID="000e29e1-05"

/dev/md2: PTUUID="1859f603" PTTYPE="dos"
/dev/md1: PTUUID="e44dc355" PTTYPE="dos"
/dev/md0: PTUUID="e52ec6bf" PTTYPE="dos"


root@grml ~ # blkid -o list
device                   fs_type    label       mount point                  UUID
------------------------------------------------------------------------------------------------------------------
/dev/loop0               squashfs               /lib/live/mount/rootfs/grml64-full_testing.squashfs
/dev/sda1                linux_raid_member any:0 (in use)                    144c71f9-edb0-bf56-1f90-6a459683edce
/dev/sda2                linux_raid_member any:1 (in use)                    2c8c7bae-5ff4-d738-fb75-bcf93cb4a6d6
/dev/sda3                linux_raid_member any:2 (in use)                    29ece338-4dfa-cc16-4512-233506a87de1
/dev/sdb1                linux_raid_member any:0 (in use)                    144c71f9-edb0-bf56-1f90-6a459683edce
/dev/sdb2                linux_raid_member any:1 (in use)                    2c8c7bae-5ff4-d738-fb75-bcf93cb4a6d6
/dev/sdb3                linux_raid_member any:2 (in use)                    29ece338-4dfa-cc16-4512-233506a87de1

/dev/md0p1               swap       any:0       (not mounted)                c237746c-5504-4301-96ab-94dd95b0da6b
/dev/md1p1               ext4       any:1       (not mounted)                419273e2-675e-486a-9387-7ad1305bcedb
/dev/md2p1               ext4       any:2       (not mounted)                982c030c-6da0-4adb-80fc-04af9bdfee6b

/dev/sda5                ext4                   (not mounted)                a6fd1988-87a3-429b-9292-60833d72497a
/dev/sdb5                ext4                   (not mounted)                4616245c-0306-4a0e-8d90-d31778f8999c
/dev/md2                                        (not mounted)
/dev/md1                                        (not mounted)
/dev/md0                                        (not mounted)

root@grml ~ # mdadm --detail --scan
ARRAY /dev/md2 metadata=1.0 name=any:2 UUID=29ece338:4dfacc16:45122335:06a87de1
ARRAY /dev/md1 metadata=1.0 name=any:1 UUID=2c8c7bae:5ff4d738:fb75bcf9:3cb4a6d6
ARRAY /dev/md0 metadata=1.0 name=any:0 UUID=144c71f9:edb0bf56:1f906a45:9683edce

so geht es also nicht

Das Ganze nochmal - geht so aber auch nicht

also ein reboot und dann anzeigen lassen

root@grml ~ # mdadm --detail --scan
ARRAY /dev/md/2 metadata=1.0 name=any:2 UUID=29ece338:4dfacc16:45122335:06a87de1
ARRAY /dev/md/1 metadata=1.0 name=any:1 UUID=2c8c7bae:5ff4d738:fb75bcf9:3cb4a6d6
ARRAY /dev/md/0 metadata=1.0 name=any:0 UUID=144c71f9:edb0bf56:1f906a45:9683edce

root@grml ~ # blkid -o list
device                       fs_type     label        mount point                      UUID
---------------------------------------------------------------------------------------------------------------------------
/dev/sdb1                    linux_raid_member any:0  (in use)                         144c71f9-edb0-bf56-1f90-6a459683edce
/dev/sdb2                    linux_raid_member any:1  (in use)                         2c8c7bae-5ff4-d738-fb75-bcf93cb4a6d6
/dev/sdb3                    linux_raid_member any:2  (in use)                         29ece338-4dfa-cc16-4512-233506a87de1
/dev/sdb5                    ext4                     (not mounted)                    4616245c-0306-4a0e-8d90-d31778f8999c

/dev/sda1                    linux_raid_member any:0  (in use)                         144c71f9-edb0-bf56-1f90-6a459683edce
/dev/sda2                    linux_raid_member any:1  (in use)                         2c8c7bae-5ff4-d738-fb75-bcf93cb4a6d6
/dev/sda3                    linux_raid_member any:2  (in use)                         29ece338-4dfa-cc16-4512-233506a87de1
/dev/sda5                    ext4                     (not mounted)                    a6fd1988-87a3-429b-9292-60833d72497a

/dev/md2p1                   ext4        any:2        (not mounted)                    982c030c-6da0-4adb-80fc-04af9bdfee6b
/dev/md1p1                   ext4        any:1        (not mounted)                    419273e2-675e-486a-9387-7ad1305bcedb
/dev/md0p1                   swap        any:0        (not mounted)                    c237746c-5504-4301-96ab-94dd95b0da6b

/dev/md2                                              (not mounted)
/dev/md1                                              (not mounted)
/dev/md0                                              (not mounted)

root@grml ~ # mdadm --stop /dev/md0p1
mdadm: stopped /dev/md0p1
root@grml ~ # mdadm --stop /dev/md1p1
mdadm: stopped /dev/md1p1
root@grml ~ # mdadm --stop /dev/md2p1
mdadm: stopped /dev/md2p1


root@grml ~ # blkid -o list
device                       fs_type     label        mount point                      UUID
---------------------------------------------------------------------------------------------------------------------------
/dev/sdb1                    linux_raid_member any:0  (not mounted)                    144c71f9-edb0-bf56-1f90-6a459683edce
/dev/sdb2                    linux_raid_member any:1  (not mounted)                    2c8c7bae-5ff4-d738-fb75-bcf93cb4a6d6
/dev/sdb3                    linux_raid_member any:2  (not mounted)                    29ece338-4dfa-cc16-4512-233506a87de1
/dev/sdb5                    ext4                     (not mounted)                    4616245c-0306-4a0e-8d90-d31778f8999c
/dev/sda1                    linux_raid_member any:0  (not mounted)                    144c71f9-edb0-bf56-1f90-6a459683edce
/dev/sda2                    linux_raid_member any:1  (not mounted)                    2c8c7bae-5ff4-d738-fb75-bcf93cb4a6d6
/dev/sda3                    linux_raid_member any:2  (not mounted)                    29ece338-4dfa-cc16-4512-233506a87de1
/dev/sda5                    ext4                     (not mounted)                    a6fd1988-87a3-429b-9292-60833d72497a

das RAID neu starten

root@grml ~ # mdadm --assemble --scan                                                          :(
mdadm: /dev/md/0 has been started with 2 drives.
mdadm: /dev/md/1 has been started with 2 drives.
mdadm: /dev/md/2 has been started with 2 drives.

und prüfen :

root@grml ~ # cat /proc/mdstat
Personalities : [raid1]

md0 : active (auto-read-only) raid1 sda1[0] sdb1[1]
      8392576 blocks super 1.0 [2/2] [UU]

md1 : active (auto-read-only) raid1 sda2[0] sdb2[1]
      2047936 blocks super 1.0 [2/2] [UU]

md2 : active (auto-read-only) raid1 sda3[0] sdb3[1]
      22527872 blocks super 1.0 [2/2] [UU]

unused devices: <none>

hier noch einen Kommentar gefunden :
You can activate Raid md0 with the below command
mdadm -A /dev/md0
and this command to update mdadm.conf file
mdadm --examine --scan >> /etc/mdadm/mdadm.conf
.

Der Istzustand auf dem Musterserver

[xen9-muster-server - root] ~ $ blkid -o list
device            fs_type  label     mount point           UUID
------------------------------------------------------------------------------------------------
/dev/sda1         linux_raid_member any:0 (in use)         e298c15c-28a5-786c-c9af-f6ba512da00d
/dev/sda2         linux_raid_member any:1 (in use)         408cb03d-9048-fa54-d49d-e72538e59231
/dev/sda3         linux_raid_member any:2 (in use)         8f6e045d-6fa1-55cf-6a7d-30084fa7e575

/dev/sdb1         linux_raid_member any:0 (in use)         e298c15c-28a5-786c-c9af-f6ba512da00d
/dev/sdb2         linux_raid_member any:1 (in use)         408cb03d-9048-fa54-d49d-e72538e59231
/dev/sdb3         linux_raid_member any:2 (in use)         8f6e045d-6fa1-55cf-6a7d-30084fa7e575

/dev/md0          swap     any:0     <swap>                a48e718f-2539-4498-a509-0c4d55718b63
/dev/md1          ext4     any:1     /boot                 dcdbd2f1-6e0c-4337-aaef-3d9f88c4935d
/dev/md2          ext4     any:2     /                     91d9f94b-3208-49b8-a573-9460b24a587e

/dev/sdc1         vfat     desinfDATA (not mounted)        090A-B0A5
/dev/sdc2         vfat     desinfSYS (not mounted)         0733-3C7E
/dev/sdc3         ext4     desinfSIGS (not mounted)        f1e534f6-2a60-4109-9d45-807ebaf7776e
/dev/sdc4         vfat               (not mounted)         0933-2B9A


[xen9-muster-server - root] ~ $ mdadm --detail --scan
ARRAY /dev/md/any:0 metadata=1.0 name=any:0 UUID=e298c15c:28a5786c:c9aff6ba:512da00d
ARRAY /dev/md/any:1 metadata=1.0 name=any:1 UUID=408cb03d:9048fa54:d49de725:38e59231
ARRAY /dev/md/any:2 metadata=1.0 name=any:2 UUID=8f6e045d:6fa155cf:6a7d3008:4fa7e575


[xen9-muster-server - root] ~ $ cat /proc/mdstat
Personalities : [raid1]

md0 : active raid1 sdb1[1] sda1[0]
      8384448 blocks super 1.0 [2/2] [UU]
      bitmap: 0/1 pages [0KB], 65536KB chunk

md1 : active raid1 sda2[0] sdb2[1]
      2097088 blocks super 1.0 [2/2] [UU]
      bitmap: 0/1 pages [0KB], 65536KB chunk

md2 : active raid1 sda3[0] sdb3[1]
      23068544 blocks super 1.0 [2/2] [UU]
      bitmap: 1/1 pages [4KB], 65536KB chunk

unused devices: <none>
.

 

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