Hello, I wrote:
the PIO transfer speeds (very significantly) though I'm not sure of
the current state of affairs...
16bit only performance is identical (as you'd expect)
Well, I don't know what to expect, having seen figures like 0.5 (or
1.5) MB/s cited on this list...
Instead of going to bed, I tried booting FC8 (2.6.23.y) off DVD in
rescue mode and suppressing libata's DMA use: hdparm -t topped at around
1 MB/s from both SATA hard drive and PATA DVD drive with sata_sil driven
the former and pata_atiixp the latter... I wasn't able to compare
results with IDE core of course.
identical with the 32bit pio patches applied
32bit is now
Hm, I didn't realize 32-bit I/O really can really boost the IDE
speed. I vaguely remember (or misremember) benchmarking drives under
DOS (many years ago) with and without 32-bit access enabled in the
BIOS Setup and not seeing any significant differences. Perhpas it's
worth to re-benchmark this in Linux if I find the time...
With hdparm being able to control that via its -c option when using
IDE driver, it shouldn't take much time...
MBR, Sergei
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