(转自：(赛迪网社区Linux俱乐部)http://bbs.ccidnet.com/showthread.php?threadid=211409)
如何在Linux环境中使用USB接口的存储设备？这是各大电脑论坛上出现得比较多的一个问题，同此可见这也是摆在许多电脑玩家面前的一道难题。本文就为您提供一套完美的解决方案，通过下面的方法，您仅可以在Linux环境中方便地使用U盘、USB硬盘盒，而且还能将数码相机作为USB大容量存储器。这里就以Red Hat Linux 7.2为例，来一步一步地介绍如何在Linux环境中使用USB存储器。
1.在X-Windows环境中打开“控制中心”，展开“信息→USB设备”控制台树，查看Linux是否已经正确识别您的USB存储器，如果没有看到USB设备信息，那么您就应该要检查USB端口是否已经在BIOS中打开，或USB存储器与电脑的物理连接有没有连接好了。图1所示为笔者的 FinePix数码相机信息。
2.在控制台状态下输入如下命令：
fdisk -l /dev/sda
注意：不要在sda后面加通配符“*”或“?”，否则运行命令后返回的信息将不正常。如果您有多个USB设备话，则设备名在Linux下分别表示为sda、sdb、sdc等。
运行上面的命令后，笔者的电脑上返回如图2所示信息，表示系统已经找到笔者的USB设备，设备名称为/dev/sda1、可启动（Boot下面的那个*表示是活动分区），容量8MB、文件系统为FAT12。
3.在/mnt目录下建立一个挂装USB存储器的目录：
mkdir /mnt/usb
4.然后再运行装载设备命令，将USB设备挂装到/mnt/usb目录下：
mount -t msdos /dev/sda1 /mnt/usb
注意：如果在图2中显示您的USB设备的文件系统为FAT32，请使用mount -t vfat /dev/sda1 /mnt/usb命令装载USB设备。
5.运行如下命令即可查看USB存储器中的文件信息：
ls /mnt/usb
然后您就可以像对待硬盘一样对USB存储器中的数据进行拷贝、删除等操作了。
如果您不习惯于在控制台下敲敲打打，还可以在KDE桌面上建立一个指向USB存储器的快捷方式，用鼠标完成所有的文件操作，就像在Windows中一样简单，建立快捷方式的操作非常简单：用鼠标在桌面空白处单击鼠标，从弹出的快捷菜单中选择“新建/硬盘”，右键单击新创建的快捷方式，选择“属性”菜单命令，切换到“设备”选项卡，分别输入USB存储器的设备名称、安装点和文件系统类型，如图3所示。以后只需要单击该快捷方式即可方便地访问USB存储器了。
按照上文的方法，切换到KDE下，在控制中心的信息查看中找到了sedy890，
如图如示：
但是就是不能加载（在GNOME下也是如此），始终报告：mount: /dev/sda1 is not a valid block device
运行命令: /bin/dmesg | more
有关sedy890的usb设备段落如下：
hub.c: new USB device 00:07.2-2, assigned address 2
usb.c: USB device 2 (vend/prod 0xe8d/0x2) 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
scsi0 : SCSI emulation for USB Mass Storage devices
Vendor: MEDIATEK Model: FLASH DISK Rev: 218B
Type: Direct-Access ANSI SCSI revision: 02
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 2
USB Mass Storage support registered.
Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: sda1
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
I/O error: dev 08:00, sector 0
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
I/O error: dev 08:00, sector 0
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
usb.c: USB disconnect on device 00:07.2-2 address 2
Device not ready. Make sure there is a disc in the drive.
sda : READ CAPACITY failed.
sda : status = 1, message = 00, host = 0, driver = 08
Info fld=0xa00 (nonstd), Current sd00:00: sense key Not Ready
sda : block size assumed to be 512 bytes, disk size 1GB.
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
hub.c: connect-debounce failed, port 2 disabled
hub.c: new USB device 00:07.2-2, assigned address 3
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 3
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
SCSI device (ioctl) reports ILLEGAL REQUEST.
SCSI device sda: 124544 512-byte hdwr sectors (64 MB)
sda: Write Protect is off
sda: I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
unable to read partition table
网上也有类似的问题报告，可是还没有找到一个解决的办法。
绝对难题：手机U盘在Redhat linux9.0上不能挂载的问题，高手请进
不过，好像没有什么人对这个问题感兴趣哟，难道是这个论坛的朋友瞧不起用Redhat linux9.0的人，或者是这个问题太可笑，不值一看？