On Jan 6, 2008 2:53 PM, S Scharf <[EMAIL PROTECTED]> wrote: > I installed a new disk and am trying to create a one disk raid 1 on it > (and will add the second disk later) > > (Debian testing compiled with raid built into kernel) > $ cat /proc/mdstat > Personalities : [linear] [raid1] [raid10] [multipath] [faulty] [raid6] > [raid5] [raid4] > unused devices: <none> > > I have two partions on /dev/sda > > $sudo fdisk -l /dev/sda > > Disk /dev/sda: 400.0 GB, 400088457216 bytes > 255 heads, 63 sectors/track, 48641 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > Disk identifier: 0x8b148706 > > Device Boot Start End Blocks Id System > /dev/sda1 1 30 240943+ fd Linux raid > autodetect > /dev/sda2 31 517 3911827+ 82 Linux swap / > Solaris > /dev/sda3 518 48641 386556030 fd Linux raid > autodetect > > > but when I run mdadm I get the followng: > > $ sudo mdadm --create /dev/md0 --level=raid1 --raid-devices=2 /dev/sda3 > missing > mdadm: /dev/sda3 is too small: 0K > mdadm: create aborted > > any help wil be appreciated. > > Thanks > Stuart
Thanks for the replies, but I found the problem The disk had an old file system on it, and the error message was trying to tell me there wasn't enough room after the file system on the partition to add the raid superblock. The problem was I was planning on reformatting the disk after creating the raid, and the error message was too vague to fully describe what was happening. So in the end I used dd to trash the partition and all worked well. Stuart
