On Tue, May 23 2017, Wols Lists wrote: > Thanks. I've updated the section. I've taken pretty much everything > you've said, but rewritten it in my own words, so that the page remains > consistent in style. I hope I haven't missed anything. > > It's thrown up two little points I've noted on the page - if a v1.0 > mirror has its offset changed, does this break the linux boot? (that's > the "without an initramfs" boot that doesn't assemble the mirror until > after the kernel is running). Yes, if a v1.0 has a data offset that wasn't zero, you wouldn't be able to boot of a member device. But there is no good reason that I can think of to change the data offset of a device in a RAID1. > > And if you shut down cleanly during a backup-file reshape, is this fact > noted or does mdadm just assume any shutdown is dirty and use the backup > file anyway? The backup file contains UUID and version info. When mdadm determines that part of the backup is no longer needed, it invalidates the backup before enabling writes to that region of the array. So it only uses the file is there is good reason to suspect that it is both necessary and safe. (It may not always be necessary. It should always be safe). NeilBrown > > Cheers, > Wol
Attachment:
signature.asc
Description: PGP signature
