Fedora 8.0下刻录DVD的问题

Cyberman.Wu

用cdrecord刻录的，我DVD刻录机是BQ的DW1680，最高16倍速刻录，而所用DVD盘是8位速的。以前在Windows下刻录正常，但在Linux下同样的硬件刻一张DVD要40~50分钟左右，太慢了。我指定的是8倍速，它也这样显示，但后面写的时候后面有一个1.1x（在0.9x~1.1x之间波动），是不是倍速？

以下是刻录时的输出信息：

[root@localhost Fedora-9-x86_64-DVD]# cdrecord -v -eject speed=8
Fedora-9-x86_64-DVD.iso  SHA1SUM                  
[root@localhost Fedora-9-x86_64-DVD]# cdrecord -v -eject speed=8 Fedora-9-x86_64-DVD.iso
wodim: No write mode specified.
wodim: Asuming -tao mode.
wodim: Future versions of wodim may have different drive dependent defaults.
TOC Type: 1 = CD-ROM
Device was not specified. Trying to find an appropriate drive...
Looking for a DVD-R drive to store 3970.81 MiB...
Detected DVD-R drive: /dev/dvdrw
Using /dev/cdrom of unknown capabilities
scsidev: '/dev/cdrom'
devname: '/dev/cdrom'
scsibus: -2 target: -2 lun: -2
Linux sg driver version: 3.5.27
Wodim version: 1.1.6
SCSI buffer size: 64512
Device type    : Removable CD-ROM
Version        : 5
Response Format: 2
Capabilities   :
Vendor_info    : 'BENQ    '
Identification : 'DVD DC DW1680   '
Revision       : 'RB33'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Current: 0x0011 (DVD-R sequential recording)
Profile: 0x002B (DVD+R/DL)
Profile: 0x001B (DVD+R)
Profile: 0x001A (DVD+RW)
Profile: 0x0016 (DVD-R/DL layer jump recording)
Profile: 0x0015 (DVD-R/DL sequential recording)
Profile: 0x0014 (DVD-RW sequential recording)
Profile: 0x0013 (DVD-RW restricted overwrite)
Profile: 0x0012 (DVD-RAM)
Profile: 0x0011 (DVD-R sequential recording) (current)
Profile: 0x0010 (DVD-ROM)
Profile: 0x000A (CD-RW)
Profile: 0x0009 (CD-R)
Profile: 0x0008 (CD-ROM)
Profile: 0x0002 (Removable disk)
Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
Driver flags   : SWABAUDIO BURNFREE
Supported modes: PACKET SAO
Drive buf size : 1182464 = 1154 KB
Beginning DMA speed test. Set CDR_NODMATEST environment variable if device
communication breaks or freezes immediately after that.
FIFO size      : 4194304 = 4096 KB
Track 01: data  3970 MB        
Total size:     4560 MB (451:47.40) = 2033055 sectors
Lout start:     4560 MB (451:49/30) = 2033055 sectors
Current Secsize: 2048
HINT: use dvd+rw-mediainfo from dvd+rw-tools for information extraction.
Blocks total: 2298496 Blocks current: 2298496 Blocks remaining: 265441
Speed set to 11080 KB/s
Starting to write CD/DVD at speed   8.0 in real unknown mode for single session.
Last chance to quit, starting real write in    0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
Performing OPC...
Starting new track at sector: 0
Track 01: 3970 of 3970 MB written (fifo 100%) [buf  35%]   1.1x.
Track 01: Total bytes read/written: 4163696640/4163696640 (2033055 sectors).
Writing  time: 3058.132s
Average write speed   1.0x.
Min drive buffer fill was 4%
Total of 36 possible drive buffer underruns predicted.
Fixating...
Fixating time:   20.180s
wodim: fifo had 65583 puts and 65583 gets.
wodim: fifo was 0 times empty and 63660 times full, min fill was 84%.

tablea

时间太长了，肯定不正常，我一般linux 只刻cd，使用k3b,dvd到windows 下刻成功率高。现在dvd刻录机太便宜了，质量都不过关，cd 刻录上千张的时代不会有了。