diff options
Diffstat (limited to 'share/man/man4/ahci.4')
| -rw-r--r-- | share/man/man4/ahci.4 | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/share/man/man4/ahci.4 b/share/man/man4/ahci.4 index 622875c..0b1cd13 100644 --- a/share/man/man4/ahci.4 +++ b/share/man/man4/ahci.4 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd December 6, 2011 +.Dd June 18, 2012 .Dt AHCI 4 .Os .Sh NAME @@ -51,8 +51,9 @@ The following tunables are settable from the .Xr loader 8 : .Bl -ohang .It Va hint.ahci. Ns Ar X Ns Va .msi -controls Message Signaled Interrupts (MSI) usage by the specified controller -.Bl -tag -compact +controls Message Signaled Interrupts (MSI) usage by the specified controller. +.Pp +.Bl -tag -width 4n -offset indent -compact .It 0 MSI disabled; .It 1 @@ -72,7 +73,8 @@ controls SATA interface Power Management for the specified channel, allowing some power to be saved at the cost of additional command latency. Possible values: -.Bl -tag -compact +.Pp +.Bl -tag -width 4n -offset indent -compact .It 0 interface Power Management is disabled (default); .It 1 @@ -86,6 +88,7 @@ driver initiates PARTIAL PM state transition 1ms after port becomes idle; .It 5 driver initiates SLUMBER PM state transition 125ms after port becomes idle. .El +.Pp 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. @@ -98,7 +101,8 @@ 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. +chips even if they are configured for legacy IDE emulation. +Default is 1. .El .Sh DESCRIPTION This driver provides the |
