ハードディスクのsleep - tatami @Wiki

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ハードディスクに一定時間アクセスがなかった場合、standbyモードに移行させる。
hdparm の -Sオプションを使う。

# hdparm -S 60 /dev/hdc

で5分後にsleepするように設定できる。

hdparm

ドライブを停止するまでの時間を設定するオプション

 -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.
 -S n で指定。
  n=     0     :   timeouts are disabled
  n=     1-240 :   5n         sec step  =  5 sec - 20 min
  n=   241-251 :   (n-240)*30 min sterp = 30 min - 5.5 hour
  n=   252     :   21 min
  n=   253     :   vender defined
  n=   255     :   21 min 15 sec

HDドライブの状態を表示するhdparmのオプション

 -C     Check  the  current  IDE  power  mode  status,  which will always be one of
        unknown (drive does not support this command), active/idle  (normal  opera-
        tion),  standby  (low power mode, drive has spun down), or sleeping (lowest
        power mode, drive is completely shut down).  The -S, -y, -Y, and  -Z  flags
        can be used to manipulate the IDE power modes.

 -g     Display the drive geometry (cylinders, heads, sectors), the size  (in  sec-
        tors)  of  the  device,  and the starting offset (in sectors) of the device
        from the beginning of the drive.

 -i     Display the identification info that was obtained from the  drive  at  boot
        time, if available.  This is a feature of modern IDE drives, and may not be
        supported by older devices.  The data returned may or may not  be  current,
        depending  on activity since booting the system.  However, the current mul-
        tiple sector mode count is always shown.  For a more  detailed  interpreta-
        tion  of the identification info, refer to AT Attachment Interface for Disk
        Drives (ANSI ASC X3T9.2 working draft, revision 4a, April 19/93).

 -I     Request identification info directly from the drive, which is displayed  in
        a  new expanded format with considerably more detail than with the older -i
        flag.

 -v     Display  all  settings, except -i (same as -acdgkmnru for IDE, -gr for SCSI
        or -adgr for XT).  This is also the default behaviour  when  no  flags  are
        specified.

hdparmの起動時の設定

Sargeでは、init.d にhdparmが用意されていて、/etc/hdparm.conf で設定ができる。
/etc/hdparm.confに以下を追加した。

/dev/hdc {
        spindown_time = 60
}

参考サイト

• 玄箱/VINE化２/HDD関連/HDD静音化
  • http://www123.ddo.jp/pukiwiki/pukiwiki.php?%B8%BC%C8%A2%2FVINE%B2%BD%A3%B2%2FHDD%B4%D8%CF%A2%2FHDD%C0%C5%B2%BB%B2%BD#content_1_0

• 少しでも動作を速くしたい
  • http://debian.fam.cx/index.php?Tips#content_1_6

• hdparm関係 UltraDMAを使うには
  • http://www7.ocn.ne.jp/~kikuya3/linux/hdparm.html

• 「うるさい玄箱（くろばこ）をどうにかするですヨ」
  • http://www.yaroespage.com/linux/l2-008.html

• Linux Tips HDDのアクセスが妙に遅く感じるときは (@IT）
  • http://www.atmarkit.co.jp/flinux/rensai/linuxtips/189slowhdd.html

• Linux向けハードディスク監視/設定アプリケーションの紹介
  • http://www.stackasterisk.jp/tech/systemManagement/hd01_01.jsp

• ハードディスクの電源を止める (tatami内）
  • http://www5.atwiki.jp/tatami/pages/11.html#id_f256a11e