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其实我前面都看了几篇文章：
首先用
fdisk -l
没看见usb设备， 于是
modprobe usb-storage
modprobe scsi_mod
modprobe sd_mod
然后再：
mount -t vfat /dev/sda1 /mnt/usb
但还是报：
/dev/sda1 is not a valid block device
然后用
dmesg |more
输出如下：
...
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
usb-uhci.c: $Revision: 1.275 $ time 17:59:01 Mar 13 2003
usb-uhci.c: High bandwidth mode enabled
PCI: Found IRQ 10 for device 00:07.2
PCI: Sharing IRQ 10 with 00:0b.0
usb-uhci.c: USB UHCI at I/O 0xe000, IRQ 10
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
usb-uhci.c: v1.275:USB Universal Host Controller Interface driver
usb.c: registered new driver hiddev
usb.c: registered new driver hid
hid-core.c: v1.8.1 Andreas Gal, Vojtech Pavlik ;
hid-core.c: USB HID support drivers
mice: PS/2 mouse device common for all mice
hub.c: new USB device 00:07.2-1, assigned address 2
Adding Swap: 538136k swap-space (priority -1)
usb.c: USB device 2 (vend/prod 0x5e3/0x702) is not claimed by any active driver.SCSI subsystem driver Revision: 1.00
Initializing USB Mass Storage driver...
usb.c: registered new driver usb-storage
usb-uhci.c: interrupt, status 2, frame# 729
scsi0 : SCSI emulation for USB Mass Storage devices
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 2
USB Mass Storage support registered.
usbdevfs: USBDEVFS_CONTROL failed dev 2 rqt 128 rq 6 len 18 ret -84
usbdevfs: USBDEVFS_CONTROL failed dev 2 rqt 128 rq 6 len 18 ret -84
usb-uhci.c: interrupt, status 2, frame# 841
usb.c: USB disconnect on device 00:07.2-1 address 2
hub.c: new USB device 00:07.2-1, assigned address 3
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 3
...
usb.c: USB disconnect on device 00:07.2-1 address 3
hub.c: new USB device 00:07.2-2, assigned address 4
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 4
...
fdisk -l /dev/sda1
没有结果返回
fdisk -l /dev/sda也没有结果返回
请问到底是怎么回事呢？
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