cdrecord显示找不到/dev/sg*的错误，为什么？(错误内详)

x-dongzi

[root@jing root]# cdrecord -v speed=24 dev=1,1,0 -data /mnt/hdb5/1.iso
cdrecord: No write mode specified.
cdrecord: Asuming -tao mode.
cdrecord: Future versions of cdrecord may have different drive dependent defaults.
cdrecord: Continuing in 5 seconds...
Cdrecord-Clone 2.01-dvd (i686-pc-linux-gnu) Copyright (C) 1995-2004 J枚rg Schilling
Note: This version is an unofficial (modified) version with DVD support
Note: and therefore may have bugs that are not present in the original.
Note: Please send bug reports or support requests to http://bugzilla.redhat.com/bugzilla
Note: The author of cdrecord should not be bothered with problems in this version.
TOC Type: 1 = CD-ROM
scsidev: '1,1,0'
scsibus: 1 target: 1 lun: 0
cdrecord: No such device or address. Cannot open '/dev/sg*'. Cannot open SCSI driver.
cdrecord: For possible targets try 'cdrecord -scanbus'.
cdrecord: For possible transport specifiers try 'cdrecord dev=help'.
设备应该没有错，我用cdrecord -scanbus看过了，这是什么原因呢？

x-dongzi

奇怪，用 k3b却能刻，怎么回事呢？