On Thu, Sep 4, 2014 at 9:59 AM, Lamar Owen lowen@pari.edu wrote:
Of course; but in the context of an MD RAID device with member devices as raw disks I would not expect a partition table of any kind, GPT or otherwise. Whether it can be there or not is not my point; it's whether it's expected or not.
Now, for C6 the default RAID superblock is version 1.2; but if you were to create a version 1.1 superblock it would go on the very first sector of the raw device, and would overwrite the partition table. (The 1.2 superblock goes 4K in from the first sector; prior to 1.1 the superblock went to the last sector of the drive).
Does that mean autodetection/assembly would be possible with 1.2 but not 1.1? I've always considered that to be one of the best features of software raid.
Of course, ext4 at least for block group 0 skips the first 1k bytes.....
How does this mesh with the ability to mount a RAID1 member as a normal non-raid partition? I've done that for data recovery but never knew if it was safe to write that way.