On 7/10/2010 1:14 AM, Graham McArdle wrote:
Instead, create "Single Disk" arrays for each disk.
I have a question related to this but with a different controller: If I'm using
a RAID controller to provide non-RAID single-disk volumes, do I still lose out
on the hardware-independence advantage of software RAID that I would get from a
basic non-RAID HBA?
In other words, if the controller dies, would I still need an identical
controller to recognise the formatting of 'single disk volumes', or is more
'standardised' than the typical proprietary implementations of hardware RAID
that makes it impossible to switch controllers on hardware RAID?
Yep. You're screwed. :-)
single-disk volumes are still RAID volumes to the controller, so they'll
have the extra controller-specific bits on them. You'll need an
identical controller (or, possibly, just one from the same OEM) to
replace a broken controller with.
Even in JBOD mode, I wouldn't trust a RAID controller to not write
proprietary bits onto the disks. It's one of the big reasons to chose a
HBA and not a RAID controller.
--
Erik Trimble
Java System Support
Mailstop: usca22-123
Phone: x17195
Santa Clara, CA
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