Q-bus to CF [was: IOmega]
tiggerlasv at aim.com
tiggerlasv at aim.com
Wed Feb 27 23:19:41 CST 2008
I stopped holding my breath for creation of a Q-Bus IDE
controller a long time ago. While I like to think that I
do a reasonable job troubleshooting some problems,
I'm definitely not a hardware/software engineer.
It would have been nice, but it makes more sense
these days to go Q-Bus to SATA. I would imagine
that it would be alot less hassle, and certainly alot less
real estate on the board, with the smaller connectors,
and fewer traces.
At any rate, back to the topic, Q-Bus to Compact Flash.
If you can do Q-bus to Compact Flash, then you can do
Q-bus to IDE, because CF *is* an IDE interface.
Those wonderful CF to IDE adapter boards generally don't
have any circuitry on-board, except to drive status LED's.
Right now, I have Compact flash / IDE on my Q-bus,
albeit in a round-about way.
I have older CMD SCSI controllers (CQD-200's).
Attached to those are ACard 7720U SCSI <> IDE adapters.
The CMD controllers don't have any problems with them,
and it seems to be happy with older IDE drives that I've tried.
And finally, I have ACS IDE <> Compact Flash adpaters.
You can use any IDE <> CF adapter you want,
and you can certainly get them alot cheaper elsewhere.
I chose the ACS unit, since they were one of the few
that I could find that offered it in a 3.5" drive frame.
They also offer them in a 5.25" form factor, but I think
they're just using a readily available 3.5" to 5.25" frame.
I use a SCSI removeable chassis, so I had to modify my
Acard 7720U in order to fit everything into the tray.
There is at least one vendor that offers a direct
SCSI to CF adapter, but they were a bit pricy
compared to my homebrew version.
I have tested my configuration with CF cards
ranging from 4MB up through 2GB, and find
that it works adequately for my needs.
I could see no discernable speed increase between
using real SCSI drives, and the IDE <> CF adapter,
although I wasn't trying to do any significant benchmarking.
(The CQD-200's are kind of poky controllers anyway,
so this didn't really surprise me.)
Now, if I only I could use PUTR to dump a disk image
onto a RAW IDE device, I'd be a happy camper. . . ;-)
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