Very low disk performance Highpoint 1820a

[Scott Long]

Steven Hartland wrote:
> If that where the case it would have been it wouldn't have been
> 46Mb/s it would have been 543Mb/s, just tested it for you :P

The RR1280 cards are really just software RAID cards.  All of the parity
calculations are done by the CPU.  I couldn't find much evidence that
the driver has parity routines that are optimized for the CPU, so it's
likely doing a very inefficient job at it.

Scott