🚀 go-pugleaf

rls@.wedge.nt.com (Robert L. Smith) writes:
>    I've been using OS2/2.0 for a month or so, on a '386DX with two
>hard drives, and get the impression that OS2 does nothing else --
>i.e., suspends multitasking -- while a hard disk operation is in
>progress.  If true, the reason may be that OS2 must poll the hard
>drive adapter to detect completion.  One piece of evidence for this
>conclusion (among others) is that a simple disk-to-disk copy operation
>in one partition disrupts a 9600-baud com transfer controlled by
>another.

  Chances are your SCSI adapter is holding up the ISA Bus too
long during a DMA transfer.  I'm using an Always IN-2000 with
the INT13 driver and I do not have any problems with high speed
transfers.  The IN-2000 uses programmable IO and does not use
DMA.  I tried a bus-mastering DMA controller before and I can't
successfully transfer a file at 19.2K even under DOS, let alone
OS/2.  I'm waiting for an OS/2 driver to come out before I pass
final judgement, but I'm not optimistic.