Re: Pb de RAID au re démarrage d'un serveur XEN : le RAID5 ne voit plus qu'un disque sur 4.

[Pascal Hambourg <pascal@plouf.fr.eu.org>]

Yann COHEN a écrit :
> Bonjour,
> 
> J'ai redémarré le serveur pour de nouveau avoir le problème...
> Je joins le log de mdadm --assemble /dev/md2
=============
> mdadm: looking for devices for /dev/md2
> mdadm: no RAID superblock on /dev/sdc
> mdadm: /dev/sdc has wrong uuid.
> mdadm: no RAID superblock on /dev/sdd
> mdadm: /dev/sdd has wrong uuid.
> mdadm: no RAID superblock on /dev/sde
> mdadm: /dev/sde has wrong uuid.
> mdadm: cannot open device /dev/md/1: Device or resource busy
> mdadm: /dev/md/1 has wrong uuid.
> mdadm: no RAID superblock on /dev/md/0
> mdadm: /dev/md/0 has wrong uuid.
> mdadm: no RAID superblock on /dev/sdb
> mdadm: /dev/sdb has wrong uuid.
> mdadm: cannot open device /dev/sda2: Device or resource busy
> mdadm: /dev/sda2 has wrong uuid.
> mdadm: cannot open device /dev/sda1: Device or resource busy
> mdadm: /dev/sda1 has wrong uuid.
> mdadm: cannot open device /dev/sda: Device or resource busy
> mdadm: /dev/sda has wrong uuid.
> mdadm: /dev/sdc1 is identified as a member of /dev/md2, slot 0.
> mdadm: /dev/sdd1 is identified as a member of /dev/md2, slot 1.
> mdadm: /dev/sde1 is identified as a member of /dev/md2, slot 2.
> mdadm: /dev/sdb1 is identified as a member of /dev/md2, slot 3.
> mdadm: added /dev/sdd1 to /dev/md2 as 1
> mdadm: added /dev/sde1 to /dev/md2 as 2
> mdadm: added /dev/sdb1 to /dev/md2 as 3
> mdadm: added /dev/sdc1 to /dev/md2 as 0
> mdadm: /dev/md2 has been started with 4 drives.
=============
Les messages "wrong uuid" ne concernent que des périphériques (disques
ou partitions) qui ne sont pas membres de /dev/md2. En revanche les 4
partitions membres sont bien reconnues. Rien d'anormal donc.