diff options
author | Theo de Raadt <deraadt@cvs.openbsd.org> | 1996-10-04 02:02:04 +0000 |
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committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 1996-10-04 02:02:04 +0000 |
commit | 37babd07594faf4e90a3c0180b540298e2796e2d (patch) | |
tree | 56354bb05d3763a235f1917dbc7e090229b61c1d /share/man/man4/ahc.4 | |
parent | 3b6a1dc93e56b4cef6f7dd33ce0a275a84be4002 (diff) |
sync
Diffstat (limited to 'share/man/man4/ahc.4')
-rw-r--r-- | share/man/man4/ahc.4 | 64 |
1 files changed, 32 insertions, 32 deletions
diff --git a/share/man/man4/ahc.4 b/share/man/man4/ahc.4 index 3731302bcf0..c5ed98293ec 100644 --- a/share/man/man4/ahc.4 +++ b/share/man/man4/ahc.4 @@ -1,4 +1,4 @@ -.\" $NetBSD: ahc.4,v 1.1 1996/07/10 22:58:35 explorer Exp $ +.\" $NetBSD: ahc.4,v 1.1.2.1 1996/08/25 17:22:14 thorpej Exp $ .\" .\" Copyright (c) 1995, 1996 .\" Justin T. Gibbs. All rights reserved. @@ -27,8 +27,10 @@ .\" .\" .Dd April 20, 1996 -.Dt AHC 4 i386 -.Os FreeBSD +.\".Dt AHC 4 i386 +.\".Os FreeBSD +.Dt AHC 4 +.Os .Sh NAME .Nm ahc .Nd Adaptec VL/EISA/PCI SCSI host adapter driver @@ -39,8 +41,7 @@ For one or more VL/EISA cards: .Cd controller ahc0 \} \{For VL cards: -.Cd ahc* at eisa? slot ? -.Cd options AHA284X_HACK +.Cd ahc0 at isa? port ? irq ? .Pp For EISA cards: .Cd ahc* at eisa? slot ?\} @@ -132,6 +133,32 @@ in the .Tn SCSI-Select utility will allow normal function. +.if 1 \{ +.Pp +There are four problems known this version of this driver as follows. +All of these problems relate to MI SCSI system. +.Pp +Cannot handle SCSI ID greater than 7 with WIDE SCSI adapter. +.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. +\} .Sh SEE ALSO .Xr aha 4 , .Xr ahb 4 @@ -148,30 +175,3 @@ driver was written by Justin Gibbs. The .Tn AIC7xxx sequencer-code assembler was written by John Aycock. -.if 1 \{NetBSD porting is done by Stefan Grefen, Charles M. Hannum, -Michael Graff, Pete Bentley and Noriyuki Soda. -.Sh BUGS -There are four problems known in NetBSD version of this driver. -All of these problems relate to NetBSD MI SCSI system. -.Pp -Cannot handle SCSI ID greater than 7 with WIDE SCSI adapter. -.Pp -It is dangerous to use SCSI devices more than half of SCBs. -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 -There is possibility of causing "Can't malloc SCB" error. -.Pp -SCSI residual handling is not complete. -\} -.Sh HISTORY -The -.Nm -driver appeared in -.Tn FreeBSD -2.1 -.if 1 \{and -.Tn NetBSD -1.1. -\} - |