Linux 下使用外置 USB 存储设备的一点经验

Linux 下使用外置 USB 存储设备的一点经验

作者: quanliking

来自:

我使用的是台式机的外置硬盘盒，没有笔记本外置硬盘盒，没法测试，不过想来区别只在体积问题。

测试设备：
1. 移动之星光驱盒 + 40X cd-rw
2. 移动之星硬盘盒 + 40G hd
盒子都是银灰色，铝合金那种，使用的都是些台式机上的老设备，觉得闲置可惜，就利用起来，听听 CD, 刻个盘，备份文件什么的。

Linux 支持的不错，只要内核选上相应模块就可以了。所需模块如下：
Linux Kernel v2.6.11.4 Configuration

代码:

Device Drivers

USB support --->

--- USB Host Controller Drivers

EHCI HCD (USB 2.0) support <---- USB 2.0

UHCI HCD (most Intel and VIA) support <---- USB 1.1

--- NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support' may also be needed; see USB_STORAGE

USB Mass Storage support

SCSI device support --->

SCSI device support[*] legacy /proc/scsi/ support

--- SCSI support type (disk, tape, CD-ROM)

SCSI disk support <---- 外置硬盘

SCSI CDROM support <---- 外置刻录机

SCSI generic support <---- 选上能获取更多信息

$ modconf
在列表中选上上述模块。

查看已加载的模块:
$ lsmod |grep usb

usb_storage 32832 2
scsi_mod 94312 4 sg,sd_mod,usb_storage,sr_mod
usbhid 34496 0
usbcore 122104 5 usb_storage,uhci_hcd,usbhid,ehci_hcd

$ lsmod |grep hcd
uhci_hcd 33104 0
ehci_hcd 32936 0
usbcore 122104 5 usb_storage,uhci_hcd,usbhid,ehci_hcd

其中 sr_mod 是光驱模块，sd_mod 是硬盘模块。

下面让我们来看看都多哪些设备：
$ cd /proc/scsi/
$ ls
device_info scsi sg usb-storage
$ cat scsi
Attached devices:
Host: scsi1 Channel: 00 Id: 00 Lun: 00

Vendor: CDWRITER Model: IDE4816 Rev: 0A2G
Type: CD-ROM ANSI SCSI revision: 02
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: USB 2.0 Model: Storage Device Rev: 0100
Type: Direct-Access ANSI SCSI revision: 02

$ cd /dev

$ ls |grep scd
scd0
这是我的刻录机设备文件。

$ ls |grep sda
sda
sda1
sda2
sda5

sda6
这里当然是外置硬盘了。

$ cdrdao scanbus

代码:

Cdrdao version 1.1.9 - (C) Andreas Mueller

SCSI interface library - (C) Joerg Schilling

Paranoia DAE library - (C) Monty

Check for current driver tables.

Using libscg version 'schily-0.8'

1,0,0 : CDWRITER, IDE4816 , 0A2G

ATA:1,0,0 MATSHITA, DVD-ROM SR-8175 , G228

$ cdrecord -scanbus

代码:

Cdrdao version 1.1.9 - (C) Andreas Mueller

SCSI interface library - (C) Joerg Schilling

Paranoia DAE library - (C) Monty

Check for current driver tables.

Using libscg version 'schily-0.8'

1,0,0 : CDWRITER, IDE4816 , 0A2G

ATA:1,0,0 MATSHITA, DVD-ROM SR-8175 , G228

~# cdrecord -scanbus

Cdrecord-Clone 2.01.01a01 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jrg Schilling

NOTE: this version of cdrecord is an inofficial (modified) release of cdrecord

and thus may have bugs that are not present in the original version.

Please send bug reports and support requests to .

The original author should not be bothered with problems of this version.

cdrecord: Warning: Running on Linux-2.6.11.4.050316

cdrecord: There are unsettled issues with Linux-2.5 and newer.

cdrecord: If you have unexpected problems, please try Linux-2.4 or Solaris.

Linux sg driver version: 3.5.32

Using libscg version 'schily-0.8'.

scsibus1:

1,0,0 100) 'CDWRITER' 'IDE4816 ' '0A2G' Removable CD-ROM

1,1,0 101) *

1,2,0 102) *

1,3,0 103) *

1,4,0 104) *

1,5,0 105) *

1,6,0 106) *

1,7,0 107) *

scsibus2:

2,0,0 200) 'USB 2.0 ' 'Storage Device ' '0100' Disk

2,1,0 201) *

2,2,0 202) *

2,3,0 203) *

2,4,0 204) *

2,5,0 205) *

2,6,0 206) *

2,7,0 207) *

$ cdrecord -prcap -inq dev=1,0,0

代码:

Cdrecord-Clone 2.01.01a01 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jrg Schilling

NOTE: this version of cdrecord is an inofficial (modified) release of cdrecord

and thus may have bugs that are not present in the original version.

Please send bug reports and support requests to .

The original author should not be bothered with problems of this version.

cdrecord: Warning: Running on Linux-2.6.11.4.050316

cdrecord: There are unsettled issues with Linux-2.5 and newer.

cdrecord: If you have unexpected problems, please try Linux-2.4 or Solaris.

scsidev: '1,0,0'

scsibus: 1 target: 0 lun: 0

Linux sg driver version: 3.5.32

Using libscg version 'schily-0.8'.

Device type : Removable CD-ROM

Version : 0

Response Format: 1

Vendor_info : 'CDWRITER'

Identifikation : 'IDE4816 '

Revision : '0A2G'

Device seems to be: Generic mmc CD-RW.

Drive capabilities, per MMC-2 page 2A:

Does read CD-R media

Does write CD-R media

Does read CD-RW media

Does write CD-RW media

Does not read DVD-ROM media

Does not read DVD-R media

Does not write DVD-R media

Does not read DVD-RAM media

Does not write DVD-RAM media

Does support test writing

Does read Mode 2 Form 1 blocks

Does read Mode 2 Form 2 blocks

Does read digital audio blocks

Does restart non-streamed digital audio reads accurately

Does support Buffer-Underrun-Free recording

Does read multi-session CDs

Does read fixed-packet CD media using Method 2

Does not read CD bar code

Does not read R-W subcode information

Does read raw P-W subcode data from lead in

Does return CD media catalog number

Does return CD ISRC information

Does support C2 error pointers

Does not deliver composite A/V data

Does play audio CDs

Number of volume control levels: 256

Does support individual volume control setting for each channel

Does support independent mute setting for each channel

Does not support digital output on port 1

Does not support digital output on port 2

Loading mechanism type: tray

Does support ejection of CD via START/STOP command

Does not lock media on power up via prevent jumper

Does allow media to be locked in the drive via PREVENT/ALLOW command

Is not currently in a media-locked state

Does not support changing side of disk

Does not have load-empty-slot-in-changer feature

Does not support Individual Disk Present feature

Maximum read speed: 7056 kB/s (CD 40x, DVD 5x)

Current read speed: 706 kB/s (CD 4x, DVD 0x)

Maximum write speed: 7056 kB/s (CD 40x, DVD 5x)

Current write speed: 7056 kB/s (CD 40x, DVD 5x)

Buffer size in KB: 2048

Copy management revision supported: 0

$ scsiadd -p

代码:

Attached devices:

Host: scsi1 Channel: 00 Id: 00 Lun: 00

Vendor: CDWRITER Model: IDE4816 Rev: 0A2G

Type: CD-ROM ANSI SCSI revision: 02

Host: scsi2 Channel: 00 Id: 00 Lun: 00

Vendor: USB 2.0 Model: Storage Device Rev: 0100

Type: Direct-Access ANSI SCSI revision: 02

$ apt-get install sg-utils
$ sg_scan
/dev/sg0: scsi1 channel=0 id=0 lun=0 [em] type=5
/dev/sg1: scsi2 channel=0 id=0 lun=0 [em] type=0
$ sg_map
/dev/sg0 /dev/scd0
/dev/sg1 /dev/sda

上面的信息应该很清楚了。接下来讨论一下刻录软件,我用的是 k3b。
$ apt-get install k3b
看截图 1, 2

xine 播放器，audio device 位置：
看截图 3
$ cfdisk /dev/sda

代码:

cfdisk 2.12p

Disk Drive: /dev/sda

Size: 40020664320 bytes, 40.0 GB

Heads: 255 Sectors per Track: 63 Cylinders: 4865

Name Flags Part Type FS Type [Label] Size (MB)

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Pri/Log Free Space 8.23

sda5 Logical W95 FAT32 10487.24

Logical Free Space 106.93

sda6 Logical W95 FAT32 10372.08

sda2 Boot Primary W95 FAT32 (LBA) 19041.53

By at 2005-05-10 05:23 | | | 2361 阅读