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From: Warner Losh <imp@FreeBSD.org>
Date: Sat, 3 Nov 2018 00:47:03 +0000 (UTC)
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Subject: svn commit: r340093 - head/share/man/man4
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Author: imp
Date: Sat Nov  3 00:47:02 2018
New Revision: 340093
URL: https://svnweb.freebsd.org/changeset/base/340093

Log:
  Document disbale_phy in ahcich sysctls.

Modified:
  head/share/man/man4/ahci.4

Modified: head/share/man/man4/ahci.4
==============================================================================
--- head/share/man/man4/ahci.4	Sat Nov  3 00:37:51 2018	(r340092)
+++ head/share/man/man4/ahci.4	Sat Nov  3 00:47:02 2018	(r340093)
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd October 22, 2013
+.Dd November 2, 2018
 .Dt AHCI 4
 .Os
 .Sh NAME
@@ -162,6 +162,13 @@ fault LED device nodes
 .It Pa /dev/led/ahci*.*.locate
 locate LED device nodes
 .El
+.Sh SYSCTL
+.Bl -tag
+.It Pa dev.ahcich.X.disable_phy
+Set to 1 to disable the phy for the drive on channel X.
+Set to 0 to enable the phy.
+Useful for turning off troublemakers.
+Also useful for debugging when you need the ada drive to come and go.
 .Sh SEE ALSO
 .Xr ada 4 ,
 .Xr ata 4 ,