My first PC SCSI drives were interfaced via a 1522,
and, though it uses
programmed I/O, it was always at least fast enough for Windows or Linux use.
People went on endlessly about how much better the DMA-based boards
were, but, I
couldn't prove it. In fact, it was over a year after I got my first
3940AU (the
Yes, I liked the 1522A that I had. Never had any problems
out of it once I upgraded the ROM so that I could use the whole 2gig
of the IBM 0662 hard disk I was trying to plug up to it. I didn't
care much for thier prep/format software under Windows though.
In general, I'd say that if you can find an
alternative to ADAPTEC, at least
with their PCI products, I'd use the alternative.
I've never had any problems with the 2930U with CD-R's,
scanners and hard disks. I've not used the 2940U2B enough to make a
judgement yet. I'll likely be running both in the same machine soon
though so that I don't have to try and mix the LVD and SCSI-2 stuff
on the same bus. The 2930U would be just for legacy stuff I don't
feel like upgrading anyway, such as my scanner.
Jeff
--
Collector of Classic Microcomputers and Video Game Systems:
Home of the TRS-80 Model 2000 FAQ File
http://www.geocities.com/siliconvalley/lakes/6757