Feizhou wrote:
Originally I had boot on 2 drives raid1, with 2 more drives being
hotspares. Then I realized that this makes no sense, if you can just
set up a raid1 with 4 drives (where each drive is a copy of each
other). Didn't really know if it was supported, but looks like it
works.
The entire use all four disks for /boot makes no sense if two disks
belonging to the same mirror for the lvm go down. Please stop this
nonsense about surviving everything to no benefit. You can have three
disks fail and still have a working /boot. For what?
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Feizhou,
After thinking about it for a little bit, I see your point. If one of
the arrays fails, the data drive is gone, and there is no point keeping
boot after that. This means it suffices to put /boot on the first raid1
array.
However, as was mentioned elsewhere in this thread, by mirroring the
boot partition on all 4 drives, I don't have to worry about which order
the drives are plugged in, and I can preserve disk symmetry. Since the
cost of the drive is about $0.25 a GB, I think wasting the $0.10 is
worth the flexibility and peace of mind.
Russ
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