On Mon, 25 Jan 2010 10:52:21 +0100 Andre Noll <maan@xxxxxxxxxxxxxxx> wrote: > On 15:09, Jim Paris wrote: > > > I guess the only way to be fully safe with the current approach is to > > do a zero-superblock over and over until it complains. > > mdadm --zero-superblock tries to guess the location of the superblock. > If more than one superblock is found, the one with the latest creation > time is being zeroed. So yes, the method you describe works and I think > it is the most reliable way to remove all superblocks of a device. > > Maybe we could teach mdadm --zero-superblock to honor the --metadata=x > option which would zero-out the region of the device where the > version-x superblock is located. Latest mdadm has this feature. And if --metadata= isn't given, it repeatedly trying to find and zero a superblock until no more superblocks can be found. 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
