当我把移动硬盘接上后 /dev 下只有一个 sdb，看不见分区，fidsk -l /dev/sdb 什么信息都得不到。查看 dmesg 信息，发现系统已经认出了我的三星硬盘
scsi6 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
Vendor: SAMSUNG Model: HM120JC Rev: 0 0
Type: Direct-Access ANSI SCSI revision: 00
SCSI device sdb: 234441648 512-byte hdwr sectors (120034 MB)
sdb: Write Protect is off
sdb: Mode Sense: 03 00 00 00
sdb: assuming drive cache: write through
SCSI device sdb: 234441648 512-byte hdwr sectors (120034 MB)
sdb: Write Protect is off
sdb: Mode Sense: 03 00 00 00
sdb: assuming drive cache: write through
sdb:<6>sd 6:0:0:0: SCSI error: return code = 0x10070000
end_request: I/O error, dev sdb, sector 0
printk: 10 messages suppressed.
Buffer I/O error on device sdb, logical block 0
sd 6:0:0:0: SCSI error: return code = 0x10070000
end_request: I/O error, dev sdb, sector 0
Buffer I/O error on device sdb, logical block 0
unable to read partition table
sd 6:0:0:0: Attached scsi disk sdb
usb-storage: device scan complete
sd 6:0:0:0: SCSI error: return code = 0x10070000
end_request: I/O error, dev sdb, sector 234441472
Buffer I/O error on device sdb, logical block 29305184
sd 6:0:0:0: SCSI error: return code = 0x10070000
end_request: I/O error, dev sdb, sector 234441472
...
sd 6:0:0:0: SCSI error: return code = 0x10070000
end_request: I/O error, dev sdb, sector 0
sd 6:0:0:0: SCSI error: return code = 0x10070000
end_request: I/O error, dev sdb, sector 0
sd 6:0:0:0: SCSI error: return code = 0x10070000
...
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