Setting Standby Mode for ATA Disks

Arne Schwabe arne at rfc2549.org
Fri Jun 25 10:20:33 PDT 2004


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 :/

Arne
-- 
compiling millions of tiny c-programs...done
checking for a working configure script... not found


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