kurttrail said:
Huh? The PCI RAID card is not hardware?
The card is "hardware" in the general use of the term, but in the RAID world
there is "software RAID" and "hardware RAID". What you have there is
referred to as "software RAID".
You need three things to call a controller "hardware RAID". One is the
on-board processor which will handle RAID requests instead of the main
processor. The other is the XOR chip which calculates the parity
information. The last is memory. The memory serves two purposes. The memory
helps the on-board processor store some data and the other purpose is
cache. The 3ware and many others have all three components that make
hardware RAID controllers. The Highpoints and Promises do not. Of course
expect to pay more for a real hardware RAID controller.
Sofware RAID controllers like you have use the main processor (your CPU) to
handle either the RAID requests or XOR. It's sort of like the difference
between real hardware modems and winmodems.

The negative with sofware
RAID is of course it's sharing the same PCI bus with other peripherals and
using up clock cycles in the CPU.
The logic for your sofware RAID card is done in a software driver that would
be proprietary and I don't know whether they provide a driver for Linux?
They might, you'll have to check that yourself. There might be an open
source driver available. Again, I didn't check.
Checkout this article at Tom's Hardware for a little about the difference
between hardware RAID and sofware RAID.
http://www.tomshardware.com/storage/20040625/index.html
Cheers
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