[Lincs] Hdparm commands

carl Inglis carl at yoshiwara.org.uk
Mon Nov 17 12:13:10 UTC 2008


I'd be inclined to look at the -S option:

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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 seconds 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 "timeouts are disabled":
the device will not automatically enter standby mode. Values from 1 to 240
specify multiples of 5 seconds, yielding timeouts from 5 seconds to 20
minutes. Values from 241 to 251 specify from 1 to 11 units of 30 minutes,
yielding timeouts from 30 minutes to 5.5 hours. A value of 252 signifies a
timeout of 21 minutes. A value of 253 sets a vendor-defined timeout period
between 8 and 12 hours, and the value 254 is reserved. 255 is interpreted
as 21 minutes plus 15 seconds. Note that some older drives may have very
different interpretations of these values.
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Perhaps put an hdparm -s in your startup scripts (rc.local or init.d,
depending on your distro).



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