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SubjectRe: Ideas for v2.1
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John Meacham writes:
-> hmm.. i have a hda and and hdc and my system works fine. i have a
-> DTC-2278 controller though but i dont know if that makes a
difference.

-> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
-> ide1 at 0x170-0x177,0x376 on irq 15 (serialized with ide0)
->
-> now for some other disk questions and qualms (?)....
->
-> when it says serialized above, does than mean i can only access one at
-> once? can i paralelize them? I thought that thios was the advantage to
-> haveing the diskks on seperate controllers but i cant seem to hear them
-> being acced at once... also... maybe with the individual IDE chipset docs
-> there could be something about what is safe to try with hdparm... i tried
-> hdparm -p with my DTC-2278 and it ate my disk in a blaze of glory...

I have a DTC2278 as well... I've been following the development
kernels since .40 or so, and have run into a few problems, so I've had
a chance to talk with Mark "The IDE Guy" Lord on this... Yes, the
serialized means that you can only access one drive at a time. And
no, there is no way to parallelize the DTC, as the controller is
buggy, and will do nasty, evil things and scribble on data and crash
your system and such. As far as the -p, I've been using -p with my
setup (Connor CFS850a as hda, Mitsumi 4x CD-ROM as hdb) for a while
now with no problems - Make sure that your drives support higher PIO
modes before trying it.

-Larry
--
Larry Daffner | Linux: Unleash the workstation in your PC!
vizzie@airmail.net | http://www.linux.org/
Never underestimate the bandwidth of a station wagon full of mag tapes
-- Dennis Ritchie


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