非常感谢大家对此的想法。fdisk 看不到 USB 驱动器。在我从 13.10 升级到 14.04 之前一直正常
Dmesg 和 lsusb 显示：
> lsusb
Bus 002 Device 005: ID 058f:6362 Alcor Micro Corp. Flash Card Reader/Writer
Bus 002 Device 004: ID 046d:c517 Logitech, Inc. LX710 Cordless Desktop Laser
Bus 002 Device 003: ID 0d49:7010 Maxtor OneTouch <====================
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 008: ID 0bc2:2100 Seagate RSS LLC <=====================
Bus 001 Device 003: ID 03f0:7a04 Hewlett-Packard DeskJet D2460
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
dmesg插入我的希捷后：
[28126.919476] usb 1-1.4: USB disconnect, device number 7
[29098.566603] usb 1-1.4: new high-speed USB device number 8 using ehci-pci
[29098.673124] usb 1-1.4: New USB device found, idVendor=0bc2, idProduct=2100
[29098.673129] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[29098.673132] usb 1-1.4: Product: FreeAgent Go
[29098.673135] usb 1-1.4: Manufacturer: Seagate
[29098.673137] usb 1-1.4: SerialNumber: 2GE2G2ST
[29098.678202] usb-storage 1-1.4:1.0: USB Mass Storage device detected
[29098.678311] scsi13 : usb-storage 1-1.4:1.0
lsblk仅显示内部磁盘：
/proc/scsi/usb-storage> lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 465.8G 0 disk
├─sda1 8:1 0 39.2M 0 part
├─sda2 8:2 0 13.3G 0 part
├─sda3 8:3 0 229.6G 0 part
├─sda4 8:4 0 1K 0 part
├─sda5 8:5 0 8G 0 part
├─sda6 8:6 0 8G 0 part
├─sda7 8:7 0 115.8G 0 part /
└─sda8 8:8 0 8G 0 part [SWAP]
sdb 8:16 0 2.7T 0 disk
├─sdb1 8:17 0 1.4T 0 part /win-photos
└─sdb2 8:18 0 1.4T 0 part /photos
sr0 11:0 1 1024M 0 rom
我在以下位置看到此内容syslog：
Apr 26 23:26:38 madmax kernel: [29098.673135] usb 1-1.4: Manufacturer: Seagate
Apr 26 23:26:38 madmax kernel: [29098.673137] usb 1-1.4: SerialNumber: 2GE2G2ST
Apr 26 23:26:38 madmax kernel: [29098.678202] usb-storage 1-1.4:1.0: USB Mass Storage device detected
Apr 26 23:26:38 madmax kernel: [29098.678311] scsi13 : usb-storage 1-1.4:1.0
Apr 26 23:26:38 madmax mtp-probe: checking bus 1, device 8: "/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4"
Apr 26 23:26:38 madmax mtp-probe: bus: 1, device: 8 was not an MTP device <=== ???
物有所值：
ii libmtp-common 1.1.6-20-g1b9f164-1ubuntu2 all Media Transfer Protocol (MTP) common files
ii libmtp-runtime 1.1.6-20-g1b9f164-1ubuntu2 amd64 Media Transfer Protocol (MTP) runtime tools
ii libmtp9:amd64 1.1.6-20-g1b9f164-1ubuntu2 amd64 Media Transfer Protocol (MTP) library
ii libnet-smtp-ssl-perl 1.01-3 all Perl module providing SSL support to Net::SMTP