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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