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Document kern.cam.ada.legacy_aliases, while I'm there also fix some typos.

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MFC after:	2 weeks
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Xin LI 2015-06-19 21:26:06 +00:00
parent 602ec83516
commit fdc84efdd1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=284607
1 changed files with 15 additions and 5 deletions
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20
share/man/man4/ada.4
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@ -25,7 +25,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd October 22, 2014
.Dd June 19, 2015
.Dt ADA 4
.Os
.Sh NAME
@ -45,14 +45,14 @@ The host adapter must also be separately configured into the system before an
.Tn ATA
direct access device can be configured.
.Sh COMMAND QUEUING
Command queueing allows the device to process multiple transactions
Command queuing allows the device to process multiple transactions
concurrently, often re-ordering them to reduce the number and length of
seeks.
.Tn ATA
defines two types of queueing:
.Tn TCQ (Tagged Command Queueing, PATA legacy)
defines two types of queuing:
.Tn TCQ (Tagged Command Queuing, PATA legacy)
and
.Tn NCQ (Native Command Queueing, SATA) .
.Tn NCQ (Native Command Queuing, SATA) .
The
.Nm
device driver takes full advantage of NCQ, when supported.
@ -146,6 +146,16 @@ instead of
.Pa /etc/sysctl.conf .
The global default is currently 1.
The per-device default is to leave it as-is (follow global setting).
.It Va kern.cam.ada.legacy_aliases
.Pp
This variable determines whether
.Pa /dev/ad Ns Ar Y
symbolic links are created,
which tries to mimic old
.Xr ata 4
numbering.
Set to 1 to enable legacy aliases symlinks, 0 to disable.
The default is currently enabled.
.El
.Sh FILES
.Bl -tag -width ".Pa /dev/ada*" -compact