Re: 关于USB设备电源控制

["guo yixuan" <culu.gyx@gmail.com>]

> 用hdparm -y /dev/sda    或者  hdparm -Y    /dev/sda  试试

我试了一下，看来不行

# hdparm  --verbose -y /dev/sda

/dev/sda:
 issuing standby command
outgoing cdb:  85 06 20 00 00 00 00 00 00 00 00 00 00 40 e0 00
SG_IO: ATA_16 status=0x0, host_status=0x5, driver_status=0x0
trying legacy HDIO_DRIVE_CMD
outgoing cdb:  85 06 20 00 00 00 00 00 00 00 00 00 00 40 94 00
SG_IO: ATA_16 status=0x0, host_status=0x5, driver_status=0x0
trying legacy HDIO_DRIVE_CMD
 HDIO_DRIVE_CMD(standby) failed: Invalid argument




# hdparm  --verbose -Y /dev/sda

/dev/sda:
 issuing sleep command
outgoing cdb:  85 06 20 00 00 00 00 00 00 00 00 00 00 40 e5 00
SG_IO: ATA_16 status=0x0, host_status=0x5, driver_status=0x0
trying legacy HDIO_DRIVE_CMD
outgoing cdb:  85 06 20 00 00 00 00 00 00 00 00 00 00 40 99 00
SG_IO: ATA_16 status=0x0, host_status=0x5, driver_status=0x0
trying legacy HDIO_DRIVE_CMD
 HDIO_DRIVE_CMD(sleep) failed: Invalid argument



sdparm -C stop 也不行