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我用 Google 搜索，但找不到答案，所以我们就在这里！我真的需要一位大师，因为我发誓我不会脱颖而出……
我使用 Ubuntu 18.04，并且我有这两个外部 USB 硬盘 3，我永远无法让它们旋转。
Vendor: Seagate
Product: M3 Portable
Revision: 9300
Compliance: SPC-4
User Capacity: 4.000.787.029.504 bytes [4,00 TB]
Logical block size: 512 bytes
Physical block size: 4096 bytes
Logical Unit id: 0x5000000000000001
Serial number: NM13R59H
Device type: disk
Local Time is: Tue Jun 12 20:00:34 2018 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Disabled
Temperature Warning: Disabled or Not Supported
Vendor: Seagate
Product: Expansion
Revision: 9300
Compliance: SPC-4
User Capacity: 4.000.787.029.504 bytes [4,00 TB]
Logical block size: 512 bytes
Physical block size: 4096 bytes
Logical Unit id: 0x5000000000000001
Serial number: NZ0E3577
Device type: disk
Local Time is: Tue Jun 12 20:01:15 2018 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Disabled
Temperature Warning: Disabled or Not Supported
我尝试过：sudo hdparm -S 100 /dev/sdc1
/dev/sdc1:
setting standby to 100 (8 minutes + 20 seconds)
SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 00 00 00 00 24 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
但它不起作用..
还有一件事，为什么 usb3 被视为 SCSI？看这里：
dmesg | grep scsi
[ 1.944067] scsi host0: ahci
[ 1.955138] scsi host1: ahci
[ 2.442233] scsi 0:0:0:0: Direct-Access ATA Samsung SSD 850 2B6Q PQ: 0 ANSI: 5
[ 2.442941] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 2.626124] scsi host2: uas
[ 2.626646] scsi 2:0:0:0: Direct-Access Seagate M3 Portable 9300 PQ: 0 ANSI: 6
[ 2.627269] sd 2:0:0:0: Attached scsi generic sg1 type 0
[ 2.628374] scsi host3: uas
[ 2.628818] scsi 3:0:0:0: Direct-Access Seagate Expansion 9300 PQ: 0 ANSI: 6
[ 2.629341] sd 3:0:0:0: Attached scsi generic sg2 type 0
真心诚意感谢所有愿意帮助我的人！