On 20 Oct 1999, Nat Lanza wrote:
> I have some development boards based on the EBSA285 with integrated
> Promise 20262 IDE controllers and 13GB Quantum Fireball CR
> disks. Currently, they're running a slightly patched version of
> 2.2.7-rmk4, and the disk performance is horrible -- peaks at a bit
> over 6MB/sec while chewing up all of the CPU. Since I want to use them
> as servers, this isn't really good enough.
I have the 20262 in my Alpha; I've currently given up using it due to two
problems:
1) The Linux driver seems to be unstable on my Alpha.
2) I'm getting worse performance than with the non-UDMA controller on
my motherboard (a CMD646).
(I'd probably try and figure out why if it wasn't for the fact that it is
the only hard drive on my main machine)
Off the top of my head I seem to remember I was getting around 12MB/s from
my IBM 7200 RPM, UDMA66 drive using the CMD and about 9 with the 20262.
Dave
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