Hi Yasui-san, Takahiro Yasui wrote: > This is a prototype patch to fix data corruption issue on dm-raid1. > It is just a draft patch and is not tested well, but let me post it > to review and discuss this in-kernel superblock approach. > > I appreciate your comments and suggestions. <snip> > * Introduce superblock area > > A superblock area is related to a mirror leg on a one-to-one basis and > keeps a sequential number to decide the default mirror when the mirror > is resumed. If you are to introduce kernel-managed RAID1 superblock, isn't it possible to use the on-disk format compatible to md's? Then the kernel code to handle the superblock may be shared between md and dm in future, which I think is even better and would help dm/md convergence. Thanks, -- Jun'ichi Nomura, NEC Corporation -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel