> I have a small question (the tiniest one really) for anyone who may know the
> answer. It goes like this:
>
> Suppose you have a RAID0 array already functioning, and you want to mirror
> it to another RAID0 array of Identical size. How do you "hot-add" this
> second array to the first?
>
> (Can you "raidhotadd /dev/md1 /dev/md2" as if md1 were just a regular
> drive?)
Someone correct me if I'm wrong, but...
I believe you'll have the same problem as when you try adding raid1 to
a working drive... that you'll need to shrink your fs off the 4k block
that the raid1 layer needs...
in the raid10 case, the drive's last 4k block will be used by the raid0
"layer" and the 4k block before that will need to be used by the raid1
that you're adding on top, so the same rules/problems from raid1'ing a
normal drive (failed-disk and all that) should apply.
I'm certainly looking forward to being corrected if I'm wrong here, as
the above is from my current understanding of how the raid code works :)
James
--
Miscellaneous Engineer --- IBM Netfinity Performance Development
