On Sun, Jan 06, 2008 at 03:38:29PM -0500, Douglas A. Tutty wrote: > On Sun, Jan 06, 2008 at 02:53:57PM -0500, S Scharf 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) > > > > > 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 > > I'm just guessing here, since I set up my raid1 when I installed Etch, > but you told it raid1 and you told it to use two devices but you only > gave it one device. What happens if you use --raid-devices=1? OP is building a deprecated (I think that's the term) array. It seems to be a common (I used it to build my array) way to migrate a system. Put one of the two disk array on ide1 while your system is on ide0. Then build the array with a disk missing. move data onto the broken array, then add the other disk in and it will sync up. Pretty slick trick really. A
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