Unix指南/解释/光盘
这会将CD音轨中的音频复制到一个文件中。对于某些驱动器（没有模拟连接到声卡的驱动器），这是正确播放文件的唯一方法。
首先，您应该对CD设备具有读写权限。（您可以成为root来读取CD，但随后您必须将文件“chown”回给您自己。）
首先查看您的CD设备节点。在*BSD上，它们位于/dev/cd*和/dev/rcd*。如果它们看起来像这样
$ ls -l /dev/cd* brw-r--'--- 1 root operator 3, 0 Nov 1 16:26 /dev/cd0a brw-r--'--- 1 root operator 3, 2 Nov 1 16:26 /dev/cd0c brw-r--'--- 1 root operator 3, 16 Nov 1 16:26 /dev/cd1a brw-r--'--- 1 root operator 3, 18 Nov 1 16:26 /dev/cd1c
这里，root需要授予用户读写权限。我们决定将用户添加到“wheel”组。一旦他们加入，我们更改设备的组并授予该组读写权限。
$ sudo chgrp wheel /dev/cd* /dev/rcd* $ sudo chmod g+gw /dev/cd* /dev/rcd* $ ls -l /dev/cd* brw-rw--'-- 1 root wheel 3, 0 Nov 1 16:26 /dev/cd0a brw-rw--'-- 1 root wheel 3, 2 Nov 1 16:26 /dev/cd0c brw-rw--'-- 1 root wheel 3, 16 Nov 1 16:26 /dev/cd1a brw-rw--'-- 1 root wheel 3, 18 Nov 1 16:26 /dev/cd1c
在读取音轨之前，我们必须插入CD。
例如，这里我们读取音轨2并将其存储在song.wav中。我们的“.wav”后缀是因为这是cdparanoia的默认格式。当CD在
$ cdparanoia 2 song37.wav
许多系统都提供eject命令。
$ eject cd0
场景：将名为backup的目录的内容放到CD中。
这里我们以root身份进行实际刻录（和弹出）。用户需要具有“sudo”访问权限，但不需要对CD设备节点有任何特殊访问权限。
创建CD的磁盘映像。我们将其命名为burn.iso.
- -R是ISO6990 Rock Ridge支持
- -r是Rock Ridge，但所有文件都位于根目录下（可在具有不同用户的计算机上使用）
- -hfs表示混合ISO9660/HFS磁盘
$ mkisofs -o burn.iso -r -hfs backup $ chmod a-w burn.iso
将其挂载以检查有效性。（NetBSD/OpenBSD）
$ sudo vnconfig /dev/svnd0c burn.iso $ sudo mount -r -t cd9660 /dev/svnd0a /mnt $ diff /mnt backup $ echo $? 0 $ sudo umount /mnt $ sudo vnconfig -u /dev/svnd0c
尽管file具有误导性，但文件系统是好的。
$ file burn.iso burn.iso: x86 boot sector, extended partition table
插入空白光盘。
这是一个演示的测试刻录cdrecord -v.
$ sudo cdrecord -v -dummy dev=/dev/cd0c burn.iso cdrecord: No write mode specified. cdrecord: Assuming -tao mode. cdrecord: Future versions of cdrecord may have different drive dependent defaults. cdrecord: Continuing in 5 seconds... Cdrecord-Clone 2.01 (--) Copyright (C) 1995-2004 Jörg Schilling TOC Type: 1 = CD-ROM scsidev: '/dev/cd0c' devname: '/dev/cd0c' scsibus: -2 target: -2 lun: -2 Using libscg version 'schily-0.8'. SCSI buffer size: 61440 atapi: 0 Device type : Removable CD-ROM Version : 0 Response Format: 2 Capabilities : Vendor_info : 'MATSHITA' Identifikation : 'CD-RW CW-8123 ' Revision : 'CA0T' Device seems to be: Generic mmc2 DVD-ROM. Current: 0x0009 Profile: 0x0010 Profile: 0x0008 Profile: 0x0009 (current) Profile: 0x000A Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr). Driver flags : MMC-2 SWABAUDIO BURNFREE Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R Drive buf size : 1731072 = 1690 KB FIFO size : 4194304 = 4096 KB Track 01: data 114 MB Total size: 130 MB (12:58.58) = 58394 sectors Lout start: 131 MB (13:00/44) = 58394 sectors Current Secsize: 2048 ATIP info from disk: Indicated writing power: 5 Is not unrestricted Is not erasable Disk sub type: Medium Type B, low Beta category (B-) (4) ATIP start of lead in: -11834 (97:24/16) ATIP start of lead out: 359849 (79:59/74) Disk type: Short strategy type (Phthalocyanine or similar) Manuf. index: 24 Manufacturer: Sony Corporation Blocks total: 359849 Blocks current: 359849 Blocks remaining: 301455 Starting to write CD/DVD at speed 24 in dummy TAO mode for single session. Last chance to quit, starting dummy write 0 seconds. Operation starts. Waiting for reader process to fill input buffer ... input buffer ready. BURN-Free is ON. Turning BURN-Free off Starting new track at sector: 0 Track 01: 114 of 114 MB written (fifo 100%) [buf 98%] 8.2x. Track 01: Total bytes read/written: 119586816/119586816 (58392 sectors). Writing time: 102.275s Average write speed 7.6x. Min drive buffer fill was 98% Fixating... WARNING: Some drives don't like fixation in dummy mode. Fixating time: 34.457s cdrecord: fifo had 1947 puts and 1947 gets. cdrecord: fifo was 0 times empty and 1860 times full, min fill was 80%. $ echo $? 0
实际刻录
$ sudo cdrecord dev=/dev/cd0c burn.iso Password: cdrecord: No write mode specified. cdrecord: Assuming -tao mode. cdrecord: Future versions of cdrecord may have different drive dependent defaults. cdrecord: Continuing in 5 seconds... Cdrecord-Clone 2.01 (--) Copyright (C) 1995-2004 Jörg Schilling scsidev: '/dev/cd0c' devname: '/dev/cd0c' scsibus: -2 target: -2 lun: -2 Using libscg version 'schily-0.8'. Device type : Removable CD-ROM Version : 0 Response Format: 2 Capabilities : Vendor_info : 'MATSHITA' Identifikation : 'CD-RW CW-8123 ' Revision : 'CA0T' Device seems to be: Generic mmc2 DVD-ROM. Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr). Driver flags : MMC-2 SWABAUDIO BURNFREE Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R Starting to write CD/DVD at speed 24 in real TAO mode for single session. Last chance to quit, starting real write 0 seconds. Operation starts. Track 01: Total bytes read/written: 119586816/119586816 (58392 sectors). $ echo $? 0
我们现在应该弹出已完成的光盘。操作系统或驱动器可能不知道光盘现在在其上有一个文件系统。
$ sudo eject cd0
如果我们重新插入光盘，那么我们可以挂载/卸载它。
$ sudo mount /dev/cd0a /mnt $ sudo umount /mnt
