svn commit: r228305 - head/share/man/man4
Alexander Motin
mav at FreeBSD.org
Tue Dec 6 09:12:12 UTC 2011
Author: mav
Date: Tue Dec 6 09:12:11 2011
New Revision: 228305
URL: http://svn.freebsd.org/changeset/base/228305
Log:
Mention that Cold Presence Detection feature used for hot-plug detection
when interface power management is enabled.
Modified:
head/share/man/man4/ahci.4
Modified: head/share/man/man4/ahci.4
==============================================================================
--- head/share/man/man4/ahci.4 Tue Dec 6 08:08:52 2011 (r228304)
+++ head/share/man/man4/ahci.4 Tue Dec 6 09:12:11 2011 (r228305)
@@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd December 2, 2011
+.Dd December 6, 2011
.Dt AHCI 4
.Os
.Sh NAME
@@ -90,9 +90,9 @@ Some controllers, such as ICH8, do not i
Because of artificial entering latency, performance degradation in modes
4 and 5 is much smaller then in modes 2 and 3.
.Pp
-Note that interface Power Management is not compatible with
-device presence detection.
-A manual bus reset is needed on device hot-plug.
+Note that interface Power Management complicates device presence detection.
+A manual bus reset/rescan may be needed after device hot-plug, unless hardware
+implements Cold Presence Detection.
.It Va hint.ahcich. Ns Ar X Ns Va .sata_rev
setting to nonzero value limits maximum SATA revision (speed).
Values 1, 2 and 3 are respectively 1.5, 3 and 6Gbps.
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