Arkadiusz Miskiewicz wrote: > I'll check. Whole /dev/sdb device should be ok because I have part of Not necessarily. You could be getting sector read/write errors on one part of the disk while the rest of the disk is fine... > /dev/md1 here, too (/dev/sdb3) and it's working fine. > Why failed? - did it read that information from old superblock? Yes, if there was a superblock there, it would have read it. > If yes then I > have feature request: avility to mdadm to erease old superblocks from > cmdline. This feature already exists. Try mdadm --zero-superblock <dev>. -- Paul - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html