On Mon, 17 May 2021 05:36:42 -0500 Roger Heflin <rogerheflin@xxxxxxxxx> wrote: > When I look at my 1.2 block, the mdraid header appears to start at 4k, and > the gpt partition table starts at 0x0000 and ends before 4k. > > He may be able to simply delete the partition and have it work. Christopher wrote that he tried: chris@ursula:~$ sudo /sbin/mdadm --verbose --assemble /dev/md0 /dev/sdb /dev/sdc /dev/sdd mdadm: looking for devices for /dev/md0 mdadm: Cannot assemble mbr metadata on /dev/sdb mdadm: /dev/sdb has no superblock - assembly aborted I would have expected mdadm when passed entire devices (not partitions) to not even look if there are any partitions, and directly proceed to checking if there's a superblock at its supposed location. But maybe indeed, from the messages it looks like it bails before that, on seeing "mbr metadata", i.e. the enclosing MBR partition table of GPT. -- With respect, Roman
