Setting Standby Mode for ATA Disks
Markie
mark.cullen at dsl.pipex.com
Fri Jun 25 10:41:20 PDT 2004
----- Original Message -----
From: "Arne Schwabe" <arne at rfc2549.org>
To: <hackers at FreeBSD.org>
Sent: Friday, June 25, 2004 5:51 PM
Subject: Setting Standby Mode for ATA Disks
| Hi,
|
| is there a way to set the standby mode for ATA Disks
|
| Under linux hdparm -S seems to work:
|
| -S Set the standby (spindown) timeout for the drive. This
value is
| used by the drive to determine how long to wait (with no
disk
| activity) before turning off the spindle motor to save
power.
| Under such circumstances, the drive may take as long as 30
sec-
| onds to respond to a subsequent disk access, though most
drives
| are much quicker. The encoding of the timeout value is
somewhat
| peculiar. A value of zero means "off". Values from 1
to 240
| specify multiples of 5 seconds, for timeouts from 5
seconds to
| 20 minutes. Values from 241 to 251 specify from 1 to 11
units
| of 30 minutes, for timeouts from 30 minutes to 5.5
hours. A
| value of 252 signifies a timeout of 21 minutes, 253 sets a
ven-
| dor-defined timeout, and 255 is interpreted as 21 minutes
plus
| 15 seconds.
|
| I googled but I did not found anything like this for FreeBSD :/
Well this almost certainly doesn't help your question at all, but when I
upgraded a box from 4.x to 5.2.1 recently I found it was spinning down one
of the disks without twiddling with any settings at all. This, in turn,
appears to have caused the box to lockup/panic (can't remember now) so I
had to make a cron job that wrote to the disk every minute to stop it from
spinning down!
I would love to know if there's some tool which can be used to just turn
this behaviour off completely!
|
| Arne
| --
| compiling millions of tiny c-programs...done
| checking for a working configure script... not found
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