[Xen-users] mdadm in Domain ?

[Tegger <xen@xxxxxxxxx>]

Hi,

i tried to make a RAID5 Software Raid with 3 HDDs


Disk /dev/xvdb: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xe86f85d6

    Device Boot      Start         End      Blocks   Id  System
/dev/xvdb1               1       30401   244196001   fd  Linux raid autodetect

Disk /dev/xvdc: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x7b497238

    Device Boot      Start         End      Blocks   Id  System
/dev/xvdc1               1       30401   244196001   fd  Linux raid autodetect

Disk /dev/xvdd: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x0009ae6e

    Device Boot      Start         End      Blocks   Id  System
/dev/xvdd1               1       30401   244196001   fd  Linux raid autodetect


but i got the error

SAMBA:~# mdadm --create /dev/md0 --level=5 --raid-device=3 /dev/xvdb1 
/dev/xvdc1 /dev/xvdd1
mdadm: /dev/xvdb1 appears to contain an ext2fs file system
    size=234259796K  mtime=Sun Jul 18 10:15:45 2010
mdadm: /dev/xvdb1 appears to be part of a raid array:
    level=raid5 devices=3 ctime=Sun Jul 18 12:44:32 2010
mdadm: /dev/xvdc1 appears to be part of a raid array:
    level=raid5 devices=3 ctime=Sun Jul 18 12:44:32 2010
mdadm: /dev/xvdd1 appears to contain an ext2fs file system
    size=248976K  mtime=Thu Jan  1 01:00:00 1970
mdadm: /dev/xvdd1 appears to be part of a raid array:
    level=raid5 devices=3 ctime=Sun Jul 18 12:44:32 2010
Continue creating array? yes
mdadm: RUN_ARRAY failed: Invalid argument
mdadm: stopped /dev/md0




why is it not working ?

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