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Diffstat (limited to 'share/man/man4/ahci.4')
| -rw-r--r-- | share/man/man4/ahci.4 | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/share/man/man4/ahci.4 b/share/man/man4/ahci.4 index 68aea35..29abd8c 100644 --- a/share/man/man4/ahci.4 +++ b/share/man/man4/ahci.4 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd May 17, 2011 +.Dd December 6, 2011 .Dt AHCI 4 .Os .Sh NAME @@ -90,12 +90,15 @@ Some controllers, such as ICH8, do not implement modes 2 and 3 with NCQ used. 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. +.It Va hw.ahci.force +setting to nonzero value forces driver attach to some known AHCI-capable +chips even if they are configured for legacy IDE emulation. Default is 1. .El .Sh DESCRIPTION This driver provides the |
