使用 sdparm 的硬盘状态信息

Question

我有一个用于备份的外部硬盘，它通过 USB 连接到我的 linux-计算机。因为 hdparm 不工作，我试着用 sudo sdparm -C stop /dev/sdf1 来降低磁盘的转速。我怎样才能知道磁盘现在是否真的在休眠？

Answer 1

如果你不想使用 hdparm，你也可以使用 smartctl 来收集这些信息。

为此，您可以运行像这样：

 sudo smartctl  -a  -n sleep /dev/sda

您基本上对 -n 参数感兴趣，它包含以下文档。

   -n POWERMODE, --nocheck=POWERMODE
          [ATA only] Specifies if smartctl should exit before performing any checks when the device is in a low-power mode. It may be used to  prevent
          a  disk  from being spun-up by smartctl. The power mode is ignored by default.  A nonzero exit status is returned if the device is in one of
          the specified low-power modes (see RETURN VALUES below).

          Note: If this option is used it may also be necessary to specify the device type with the ´-d´ option.  Otherwise the device may spin up due
          to commands issued during device type autodetection.

          The valid arguments to this option are:

          never - check the device always, but print the power mode if ´-i´ is specified.

          sleep - check the device unless it is in SLEEP mode.

          standby  -  check the device unless it is in SLEEP or STANDBY mode.  In these modes most disks are not spinning, so if you want to prevent a
          disk from spinning up, this is probably what you want.

          idle - check the device unless it is in SLEEP, STANDBY or IDLE mode.  In the IDLE state, most disks are still spinning, so this is  probably
          not what you want.

使用 sdparm 的硬盘状态信息

hard disk status info with sdparm

linux

centos7