But has the new sdh been rebuilt completely? If that case there
should be n-1 drives? Or does "spare" just means that it can be
used but has no data yet?
That's what I'm not sure about. It is "clean" but it is also
"spare". I'm not sure what state would be seen while it is rebuilding.
When the old sdh had a problem, did you mdadm /dev/mdXXX --fail /dev/sdh?
No, I didn't think I needed to do that. I just powered down the
machine and took it out.
And after you inserted the new drive, and presumably did mdadm
/dev/mdXXX --add /dev/sdh, did you see it start to rebuild in
/proc/mdstat?
Yes I did. It was around 20% or so when I left it.
Also I have my old sdh with data on it but I don't know how current
that data is but perhaps I can use that somehow?
You could mdadm --examine it, but I suspect that the event count
will be way out of line by now.
I will put it in and see what it shows. Is it correct to assume that
--examine reads the superblock and I can insert the drive into any
machine and examine it there?
Thanks,
Peter
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