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本帖最后由 yumeimm 于 2018-12-4 11:07 编辑
-C Check the current IDE power mode status, which will always be one of unknown (drive does not support
this command), active/idle (normal operation), standby (low power mode, drive has spun down), or
sleeping (lowest power mode, drive is completely shut down). The -S, -y, -Y, and -Z options can be
used to manipulate the IDE power modes.
-S Put the drive into idle (low-power) mode, and also set the standby (spindown) timeout for the drive.
This timeout 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.
-====================================================Arch Wiki上有解释：https://wiki.archlinux.org/index.php/hdparm
谢谢楼主，那个-S <参数>的含义是：
1-240: 超时的时间是多少个5秒钟，例如如果设置为60，那么是60x5(秒) = 5分钟。如果设置为240，则为：240x5(秒)=240x5/60(分钟)=200分钟=3.33小时。
241-251： 指定了1-11共11个档，每档相差30分钟。 例如241为第1挡，超时30分钟， 值251为11挡，超时为11x30分钟=5.5小时。
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楼主: 孤星追月
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发表于 2017-12-6 08:10
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