On Thu, Mar 23, 2017 at 09:09:39PM +0100, Stephen Mueller wrote: > OK, I used gdisk to remove the GPT and MBR from each disk. > mdadm --assemble still doesn't work... says it can't find the > superblock. The mdadm --examine commands also say that no > superblock is detected.
Yes the GPT overwrite the superblock. The GPT uses the first 17KB of the disk, and the superblock was at 4KB from the start. > I guess I'll go ahead with --create... At least given the data should start at 1MB from the start, it should not have been overwritten. I do always like disk images before I try anything like that. I am never quite sure what create will do although it will likely do the right thing at least if you get the order right. -- Len Sorensen