Scsi adapters and software raid...

It's been interesting reading these comments about adapters to avoid. 

My question is... what SCSI adapter works WELL with software raid
(mdadm) and doesn't get in the way?

Thanks, BobH

On Thu, 2004-02-19 at 14:18, Ricky Beam wrote:

On Thu, 19 Feb 2004, Michael wrote:

quoted

Bear in mind that what you are calling "true hardware raid" is really
a microprocessor programmed to do the raid algorithims.

3ware has custom designed matrix switch chips to handle each IDE drive.
This *alone* is worth the cost of the card.  The RAID parity calculations
are also done in hardware (not a bunch of CPU xor's.)  You'd be surprised how
much data a small "slow" processor can move when properly programmed.

quoted

These turkeys have micro-code bugs that cause a
variety of problem for which there is no workaround or solution other
than trashing the cards.

Exactly what bugs?  I've used a number of hardware SCSI RAID cards (none
by Adaptec however -- some that are now owned by Adapatec) and all of them
work properly -- as long as they aren't physically damaged (I had one with
a bad DIMM)

--Ricky


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Bob Hillegas [off-list ref]