On Thu, Jul 24, 2003 at 08:03:08PM +0530, kiran dalvi wrote: > I am trying to mirror two hard disk partitions of 200MB each with > following devicemapper table settings Device offsets/sizes should be specified in units of sectors (512 bytes) so second param (device size) should be 200781*2 ? [=number of sectors on /dev/hda7 = num sects on /dev/hda8] And if you specify device /dev/hda7 you probably then want offset to be 0 within that device? [and same for hda8] Alasdair -- agk@xxxxxxxxxxxxxx