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Date: Fri, 27 Jun 1997 01:33:19 +0200 (MET DST)
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Subject: i386/3962: print disk internal cache size during probing
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>Number:         3962
>Category:       i386
>Synopsis:       print disk internal cache size during probing
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jun 26 16:50:01 PDT 1997
>Last-Modified:
>Originator:     Andrzej Bialecki
>Organization:
Research and Academic Network in Poland
>Release:        FreeBSD 3.0-CURRENT i386
>Environment:

>Description:
	Sometimes you will want to know the size of the internal,
	built-in cache of the hard disk. At present, you would have
	to turn on the WDDEBUG in /sys/i386/isa/wd.c. It's at least
	inconvenient, as it requires the kernel to be rebuilt, and
	gives you too much information.

	Sometimes you can encounter a repaired disk with internal
	cache turned off (or bad). It's good to have a quick indication
	of this fact, especially if you buy the secondhand unit.

	This information is gathered during probing - we only have to
	display it.

>How-To-Repeat:

	/sbin/reboot ;-)

>Fix:
	This fix is against -current as of today.
	
--- wd.c.orig	Fri Jun 27 01:14:00 1997
+++ wd.c	Fri Jun 27 01:18:10 1997
@@ -460,10 +460,11 @@
 				       lunit, du->dk_dd.d_secperunit > 17
 					      ? "BIOS" : "fake");
 			printf(
-"wd%d: %luMB (%lu sectors), %lu cyls, %lu heads, %lu S/T, %lu B/S\n",
+"wd%d: %luMB, %d kB cache (%lu sectors), %lu cyls, %lu heads, %lu S/T, %lu B/S\n",
 			       lunit,
 			       du->dk_dd.d_secperunit
 			       / ((1024L * 1024L) / du->dk_dd.d_secsize),
+			       du->dk_params.wdp_buffersize>>1,
 			       du->dk_dd.d_secperunit,
 			       du->dk_dd.d_ncylinders,
 			       du->dk_dd.d_ntracks,

>Audit-Trail:
>Unformatted: