of course if you need a card to do this then you don't need MD
raid(unless the card is a FRAID card)
Scott Silva wrote:
Les Mikesell spake the following on 4/1/2007 11:37 AM:
Jeff Lasman wrote:
if the hardware can hotswap then you should be ok if i am reading
what les said correctly.
From time to time (not now) I have a machine on my testbed I can test
this on.
Should I break the software RAID first? I'd think so.
No, you'd expect a failure to automatically kick the drive out of the
raid and go on about its business.
Do I have to remake the RAID automatically? I'd think so.
Yes, you have to 'mdadm --add ...' to make the replacement sync back up.
Can I physically damage either drive?
I'd think not.
So I'm not sure I understand the problem as long as the (sata) drive
is in a hotswap bay.
Anything I'm missing?
The question is whether the kernel will notice the new drive when you
add it. It might be possible to swap in an exact match and get away
with the setup detected at boot time but that doesn't sound very
healthy. Can you hotswap a new SATA drive that wasn't present at boot
time and have the kernel notice the new drive device and its partitions.
If the partitions are recognized, mdadm will be able to add them.
I think you would need a hot-swap capable controller also in addition to the
hot swap drive cage. Some controllers can be made to re-scan the bus, some
can't. But a card that is designed to support hot swap will have this feature.
--
My "Foundation" verse:
Isa 54:17 No weapon that is formed against thee shall prosper; and
every tongue that shall rise against thee in judgment thou shalt
condemn. This is the heritage of the servants of the LORD, and their
righteousness is of me, saith the LORD.
-- carpe ductum -- "Grab the tape"
CDTT (Certified Duct Tape Technician)
Linux user #322099
Machines:
206822
256638
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http://counter.li.org/
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