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--- wiki:os:debian:raid [2012/11/28 21:47]
root vytvořeno
+++ wiki:os:debian:raid [2018/07/26 11:20] (current)
root
@@ Line 33: / Line 33: @@
 unused devices: <none>
 </code>
+===== Výměna disku =====
+Výměna disku **sdb**
+**Výchozí stav:**
+<code>
+root@pbx:~# cat /proc/mdstat
+Personalities : [raid1]
+md2 : active (auto-read-only) raid1 sda6[0] sdb6[2]
+      1174516 blocks super 1.2 [2/2] [UU]
+md1 : active raid1 sda5[0] sdb5[2]
+      877927288 blocks super 1.2 [2/2] [UU]
+md0 : active raid1 sda1[0] sdb1[2]
+      97653688 blocks super 1.2 [2/2] [UU]
+</code>
+**Oznaceni vadneho disku (partition):**
+<code>
+root@pbx:~# mdadm --manage /dev/md0 --fail /dev/sdb1
+mdadm: set /dev/sdb1 faulty in /dev/md0
+root@pbx:~#
+root@pbx:~# mdadm --manage /dev/md1 --fail /dev/sdb5
+mdadm: set /dev/sdb5 faulty in /dev/md1
+root@pbx:~#
+root@pbx:~# mdadm --manage /dev/md2 --fail /dev/sdb6
+mdadm: set /dev/sdb6 faulty in /dev/md2
+root@pbx:~# cat /proc/mdstat
+Personalities : [raid1]
+md2 : active raid1 sda6[0] sdb6[2](F)
+      1174516 blocks super 1.2 [2/1] [U_]
+md1 : active raid1 sda5[0] sdb5[2](F)
+      877927288 blocks super 1.2 [2/1] [U_]
+md0 : active raid1 sda1[0] sdb1[2](F)
+      97653688 blocks super 1.2 [2/1] [U_]
+unused devices: <none>
+</code>
+Odebrani vadneho disku z raidu:
+<code>
+root@pbx:~# mdadm --manage /dev/md0 --remove /dev/sdb1
+mdadm: hot removed /dev/sdb1 from /dev/md0
+root@pbx:~#
+root@pbx:~# mdadm --manage /dev/md1 --remove /dev/sdb5
+mdadm: hot removed /dev/sdb5 from /dev/md1
+root@pbx:~#
+root@pbx:~# mdadm --manage /dev/md2 --remove /dev/sdb6
+mdadm: hot removed /dev/sdb6 from /dev/md2
+</code>
+**Výměna disku:**
+  * Vypnout server
+  * Vyměnit disk
+  * Zapnout server
+**Zkopirovani partition table (z sda) na nový disk (sdb):**
+<code>
+root@pbx:~# sfdisk -d /dev/sda | sfdisk /dev/sdb
+root@pbx:~# fdisk -l
+</code>
+**Přidání partition do raidu:**
+<code>
+mdadm --manage /dev/md0 --add /dev/sdb1
+mdadm --manage /dev/md1 --add /dev/sdb5
+mdadm --manage /dev/md2 --add /dev/sdb6
+</code>
+**Kontrola:**
+<code>
+cat /proc/mdstat
+</code>
+===== Zrušení RAIDu =====
+<code>
+mdadm --stop /dev/md125
+mdadm --remove /dev/md125
+</code>

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