diff options
| author | brucec <brucec@FreeBSD.org> | 2010-10-24 16:31:57 +0000 |
|---|---|---|
| committer | brucec <brucec@FreeBSD.org> | 2010-10-24 16:31:57 +0000 |
| commit | 41dcd4566c627593cdaa04a32255183275a4ea8a (patch) | |
| tree | 4019b8189051d088b2d67a8077bdfb792575305d /share/man/man4/ada.4 | |
| parent | d5b2b0a30ff2f9f2c524005c77d18d36f4c37565 (diff) | |
| download | FreeBSD-src-41dcd4566c627593cdaa04a32255183275a4ea8a.zip FreeBSD-src-41dcd4566c627593cdaa04a32255183275a4ea8a.tar.gz | |
Mostly revert r203420, and add similar functionality into ada(4) since the
existing code caused problems with some SCSI controllers.
A new sysctl kern.cam.ada.spindown_shutdown has been added that controls
whether or not to spin-down disks when shutting down.
Spinning down the disks unloads/parks the heads - this is
much better than removing power when the disk is still
spinning because otherwise an Emergency Unload occurs which may cause damage
to the actuator.
PR: kern/140752
Submitted by: olli
Reviewed by: arundel
Discussed with: mav
MFC after: 2 weeks
Diffstat (limited to 'share/man/man4/ada.4')
| -rw-r--r-- | share/man/man4/ada.4 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/share/man/man4/ada.4 b/share/man/man4/ada.4 index cba892b..d16a5ea 100644 --- a/share/man/man4/ada.4 +++ b/share/man/man4/ada.4 @@ -118,6 +118,9 @@ This variable determines how long the driver will wait before timing out an outstanding command. The units for this value are seconds, and the default is currently 30 seconds. +.It kern.cam.ada.spindown_shutdown +.Pp +This variable determines whether to spin-down disks when shutting down. .El .Sh FILES .Bl -tag -width ".Pa /dev/ada*" -compact |
