See if its mounted/etc first, if not: mdadm -S /dev/md0 (stop it)

Then try again.


On Sat, 14 Oct 2006, Ray Greene wrote:

I am having problems creating a RAID 5 array using 3x400GB SATA drives
on a Dell SC430 running Xandros 4.

I created this once with Webmin and it worked OK but then I deleted it
and started again as I believe the chunk size was too small at 4kb,
the default size with Webmin.

I have repartitioned and formatted the drives. I have tried creating
the array with Webmin and at the console but it always fails with the
same error.

This is the command I use:
mdadm --create --verbose /dev/md0 --level=raid5 --chunk=256 --run
--raid-devices=3 /dev/sdb1 /dev/sdc1 /dev/sdd1

mdadm: layout defaults to left-symmetric
mdadm: /dev/sdb1 appears to contain an ext2fs file system
    size=390708800K  mtime=Wed Dec 31 19:00:00 1969
mdadm: /dev/sdc1 appears to contain an ext2fs file system
    size=390708800K  mtime=Wed Dec 31 19:00:00 1969
mdadm: /dev/sdd1 appears to contain an ext2fs file system
    size=390708800K  mtime=Wed Dec 31 19:00:00 1969
mdadm: size set to 390708736K
mdadm: creation continuing despite oddities due to --run
mdadm: SET_ARRAY_INFO failed for /dev/md0: Device or resource busy


This is the output from fdisk -l :
Disk /dev/sdb: 400.0 GB, 400088457216 bytes
255 heads, 63 sectors/track, 48641 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device  Boot Start End  Blocks    Id System
/dev/sdb1     1   48641 390708801 fd Linux raid autodetect

Disk /dev/sdc: 400.0 GB, 400088457216 bytes
255 heads, 63 sectors/track, 48641 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device  Boot Start End  Blocks    Id System
/dev/sdc1     1   48641 390708801 fd Linux raid autodetect

Disk /dev/sdd: 400.0 GB, 400088457216 bytes
255 heads, 63 sectors/track, 48641 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device  Boot Start End  Blocks    Id System
/dev/sdd1     1   48641 390708801 fd Linux raid autodetect


Why does it always give the error "Device or resource busy", and what
can I do about it?

- 
Ray Greene

-
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