On Tuesday February 5, admin@xxxxxxxxx wrote: > > % mdadm --zero-superblock /dev/sdb1 > mdadm: Couldn't open /dev/sdb1 for write - not zeroing That's weird. Why can't it open it? Maybe you aren't running as root (The '%' prompt is suspicious). Maybe the kernel has been told to forget about the partitions of /dev/sdb. mdadm will sometimes tell it to do that, but only if you try to assemble arrays out of whole components. If that is the problem, then blockdev --rereadpt /dev/sdb will fix it. 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
