想搞一套这样的NAS存储方案

对这个似乎有些印象，我明天白天看看手头的盘是否支持。因为某些原因，我手里的机械盘都是服务器上拆的，也许不乐观。
如果能支持那真的就太方便了，可能这就是我的终极方案了。 @Dazzy

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。 @Dazzy