On 07/25/11 3:54 PM, Les Mikesell wrote: > Device Boot Start End Blocks Id System > /dev/sdh1 1 91201 732572001 fd Linux raid autodetect > > It doesn't need to boot. And the 3rd member doesn't need to > autodetect, although I do want to be able to mount it independently if > needed. Should it work to use the raw disk instead of a partition? thats by "cylinder", which is an old MSDOS legacy thing. I believe parted and probably some other programs let you partition by sector instead. you previously wrote... On 07/25/11 2:44 PM, Les Mikesell wrote: > >> 255 heads, 63 sectors/track, 91201 cylinders > >> Units = cylinders of 16065 * 512 = 8225280 bytes so, a 'cylinder' is 8225 kbytes per that. simply cutting that down by a few kbytes will get you on your 4K boundary. right now a cylinder is 255*63 = 16065 sectors. which is most certainly not divisible by 8 (8 512 byte sectors is 4K bytes) -- john r pierce N 37, W 122 santa cruz ca mid-left coast