Re: ahc still being broken

[Andrew M Hoerter <amh@pobox.com>]

On Tue, 16 Sep 2003, Dimitry Andric wrote:

> Well, in this case it certainly is an OpenBSD problem.  It has *never*
> worked properly with a AIC7890-based onboard SCSI adapter I have here,
> while *every* other OS I put on that box works flawlessly with it.
> And it seems to get worse with every release... :(

I'm using the ahc driver on one machine here, and can report success on
the following configuration according to dmesg (using the 11 September
snapshot):

ahc1 at pci0 dev 13 function 0 "Adaptec AHA-2940U" rev 0x01: irq 11
ahc1: aic7880: Ultra Wide Channel A, SCSI Id=7, 16/255 SCBs
scsibus1 at ahc1: 16 targets
ahc1: target 1 synchronous at 20.0MHz, offset = 0x8
sd0 at scsibus1 targ 1 lun 0: <IBM, DCAS-32160W !#, S69D> SCSI2 0/direct
fixed
sd0: 2063MB, 8188 cyl, 3 head, 172 sec, 512 bytes/sec, 4226725 sec total
ahc1: target 2 synchronous at 20.0MHz, offset = 0x8
sd1 at scsibus1 targ 2 lun 0: <IBM, DCAS-32160W !#, S65A> SCSI2 0/direct
fixed
sd1: 2063MB, 8188 cyl, 3 head, 172 sec, 512 bytes/sec, 4226725 sec total

The controller itself is providing termination, and the last drive in the
chain is also terminated.  Nothing too special there.  However, beware if
you're mixing wide and narrow devices; you must terminate the upper data
lines where necessary or you'll probably encounter weirdness.

Actually, I'm torture-testing both drives simultaneously right now (large
recursive copies back and forth).  The system seems to hold up fine.

Just another datapoint for whoever finds it useful.