还有这个：


A typical usage case, where such a feature is looked for, is with disks connected to a cheap external USB/SATA/FireWire enclosure, or bridge. If it does not properly issue a stop command to the drive when turning off the power switch, the drive is forced to do an emergency head retract. Regularly doing that will, sooner or later, break the drive. One solution is, after one is sure the data has been written to the media, to run a command to power off the drive:
# hdparm -Y /dev/sdX
直接三次sync接-Y就搞定！明天试试硬盘支持不。


【 在 Dazzy 的大作中提到: 】
: 除了前面板友说的按需WOL，也可以简单一点，买支持APM(Advanced Power Manage ...
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