Ubuntu Sverige

Kod: Markera allt

man hdparm
       -y     Force  an  IDE drive to immediately enter the low power consumption standby mode, usually causing it to spin down.  The current power mode status can be checked
              using the -C flag.

       -Y     Force an IDE drive to immediately enter the lowest power consumption sleep mode, causing it to shut down completely.  A hard or soft reset  is  required  before
              the  drive  can be accessed again (the Linux IDE driver will automatically handle issuing a reset if/when needed).  The current power mode status can be checked
              using the -C flag.

       -B     Set  Advanced Power Management feature, if the drive supports it. A low value means aggressive power management and a high value means better performance.  Pos-
              sible settings range from values 1 through 127 (which permit spin-down), and values 128 through 254 (which do not permit  spin-down).   The  highest  degree  of
              power  management is attained with a setting of 1, and the highest I/O performance with a setting of 254.  A value of 255 tells hdparm to disable Advanced Power
              Management altogether on the drive (not all drives support disabling it, but most do).

       -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 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.

Kod: Markera allt

command_line {
       hdparm -u0 -M 254 -c3 -a 768 -m 16 /dev/hda
}