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These problems are fixed by thorpej's ahc->sc_xxxq, since Dec 02 1996.

This commit is contained in:
soda 1997-10-19 18:07:56 +00:00
parent 15de1c9fd2
commit 34eaabcd16
2 changed files with 3 additions and 27 deletions
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6
distrib/notes/i386/hardware
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@ -25,11 +25,7 @@ Supported devices include:
motherboards using this chip are likely to be
bootable, consequently.)
Adaptec AHA-2x4x[U][W] cards and some onboard PCI designs
using the AIC78X0 chip. There is a known problem
using this driver with AHA-2742 cards or AIC7770 or
AIC78[56]0 based embedded designs and multiple
targets, due to resource contention which is not
handled well by NetBSD's higher-level SCSI subsystem.
using the AIC78X0 chip.
Adaptec AHA-3940[U][W] cards [b]
Buslogic 54x (Adaptec AHA-154x clones)
BusLogic 445, 74x, 9xx (But not the new "FlashPoint" series

24
share/man/man4/ahc.4
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@ -1,4 +1,4 @@
.\" $NetBSD: ahc.4,v 1.5 1997/02/23 08:48:16 jonathan Exp $
.\" $NetBSD: ahc.4,v 1.6 1997/10/19 18:08:10 soda Exp $
.\"
.\" Copyright (c) 1995, 1996
.\" Justin T. Gibbs. All rights reserved.
@ -135,27 +135,7 @@ utility
will allow normal function.
.if 1 \{
.Pp
There are three known problems in NetBSD version of this driver as follows.
All of these problems relate to NetBSD MI SCSI system.
.Pp
It is dangerous to simultaneously access SCSI devices more than half
number of SCBs. It may cause fatal disk trouble. In this case,
diagnostics message
.Dq not queued, error ...
is displayed to console.
For example, AHA-274x and AHA-284x have only 4 SCBs, so that using 3 SCSI
devices is dangerous, using 2 devices is OK.
.Pp
When you suddenly access SCSI devices on free physical memory shortage
conditions, and if there have been very few load on SCSI devices until
then, it may cause fatal disk trouble. In this case, diagnostics
message
.Dq ahc0: Can't malloc SCB
and
.Dq not queued, error ...
is displayed to console.
.Pp
SCSI residual handling is not complete.
SCSI residual handling is not complete on NetBSD version of this driver.
\}
.Sh SEE ALSO
.Xr aha 4 ,