On Wed, 3 Aug 2011 10:59:22 +0200 Aaron Scheiner <blue@xxxxxxxxxxxxxx> wrote: > mmm, learning experience :P > > The Wikipedia page on grub says : > " > Stage 1 can load Stage 2 directly, but it's normally set up to load > Stage 1.5. GRUB Stage 1.5 is located in the first 30 kilobytes of hard > disk immediately following the MBR and before the first partition. > " > So if both stage 1 and stage 1.5 were written to the drives > approximately 30KBytes would have been overwritten, so 60 sectors? > > Why is the data offset by 256 bytes ? The array was created using a > standard create command (only specifying raid level, devices, chunk > size). The offset is 256 sectors (64K). The data obviously cannot go at the start of the drive as the metadata is there, so it is offset from the start. I leave 64K to allow for various different metadata (bitmap, bad-block log, other ideas I might have one day). NeilBrown -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
