> Promise IDE controllers now work with Linux though I'm not sure
> the code's in commercial distributions yet (you may have to find
> the appropriate patches/drivers yourself).
RedHat Linux 7.1 includes the Promise drivers. I recently upgraded my system (PIII 500MHz, 384MB mem, 20GB IDE RAID1) from RH 6.2 to 7.1, and I was able to use my Promise UDMA IDE controller -- RH 7.1 found it without drama.
Between the RedHat upgrade and using the UDMA controller, the requests-per second on my OpenACS system jumped from ~6.5 RPS to as high as ~30 RPS for static pages, and ~12 RPS for dynamic pages w/ ~2 DB queries.
See https://openacs.org/bboard/q-and-a-fetch-msg.tcl?msg_id=0002TO&topic_id=OpenACS&topic=11...