CD-ROM 刻录速度极慢

CD-ROM 刻录速度极慢

当我尝试使用 K3B 刻录 CD-ROM 时,刻录机在写入 71MB 后速度从 10 倍减慢到 0.12 倍。因此,刻录一张 142MB 的 Live CD 需要一个多小时。为什么会发生这种情况?

CD-ROM刻录机是OPTIARC DVD RW AD-5690H(固件版本4AH5),K3B使用的CD-ROM刻录工具是cdrecord 3.0。

更新:这是上次刻录操作的日志

Devices
-----------------------
OPTIARC DVD RW AD-5690H 4AH5 (/dev/sr0, Cd-r, CD-RW, Cd-rom, Dvd-rom, DVD-R, DVD-RW, DVD-R DL, DVD+R, DVD+RW, DVD+R DL) [Dvd-rom, DVD-R sekventiel, DVD-R dobbeltlag, sekvensielt, DVD-R dobbeltlag og hop-mulighed, DVD-RW begrænset overbrænding, DVD-RW sekventiel, DVD+RW, DVD+R, DVD+R dobbeltlag, Cd-rom, Cd-r, CD-RW] [SAO, TAO, RAW, SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R, Begrænset overbrænding, Lag-hop] [%7]

System
-----------------------
K3b Version: 2.0.2
KDE Version: 4.8.4 (4.8.4)
QT Version:  4.8.2
Kernel:      3.13.6

Used versions
-----------------------
cdrecord: 3.0

cdrecord
-----------------------
scsidev: '/dev/sr0'
devname: '/dev/sr0'
scsibus: -2 target: -2 lun: -2
Warning: Open by 'devname' is unintentional and not supported.
Linux sg driver version: 3.5.27
SCSI buffer size: 64512
/opt/schily/bin/cdrecord: Warning: Cannot read drive buffer.
/opt/schily/bin/cdrecord: Warning: The DMA speed test has been skipped.
Cdrecord-ProDVD-ProBD-Clone 3.00 (x86_64-unknown-linux-gnu) Copyright (C) 1995-2010 J�rg Schilling
TOC Type: 1 = CD-ROM
Using libscg version 'schily-0.9'.
Driveropts: 'burnfree'
atapi: 1
Device type    : Removable CD-ROM
Version        : 5
Response Format: 2
Capabilities   : 
Vendor_info    : 'OPTIARC '
Identifikation : 'DVD RW AD-5690H '
Revision       : '4AH5'
Device seems to be: Generic mmc2 DVD-R/DVD-RW/DVD-RAM.
Current: CD-R
Profile: DVD+R/DL 
Profile: DVD+R 
Profile: DVD+RW 
Profile: DVD-R/DL layer jump recording 
Profile: DVD-R/DL sequential recording 
Profile: DVD-RW sequential recording 
Profile: DVD-RW restricted overwrite 
Profile: DVD-R sequential recording 
Profile: DVD-ROM 
Profile: CD-RW 
Profile: CD-R (current)
Profile: CD-ROM (current)
Using generic SCSI-3/mmc   CD-R/CD-RW driver (mmc_cdr).
Driver flags   : MMC-3 SWABAUDIO BURNFREE 
Supported modes: TAO PACKET SAO SAO/R96R RAW/R16 RAW/R96P RAW/R96R
Drive buf size : 1273856 = 1244 KB
FIFO size      : 4194304 = 4096 KB
Track 01: data   142 MB        
Total size:      163 MB (16:09.38) = 72704 sectors
Lout start:      163 MB (16:11/29) = 72704 sectors
Current Secsize: 2048
ATIP info from disk:
Indicated writing power: 6
Disk Is not unrestricted
Disk Is not erasable
Disk sub type: Medium Type C, low Beta category (C-) (6)
ATIP start of lead in:  -11231 (97:32/19)
ATIP start of lead out: 359846 (79:59/71)
Disk type:    Short strategy type (Phthalocyanine or similar)
Manuf. index: 27
Manufacturer: Prodisc Technology Inc.
    Capacity  Blklen/Sparesz.  Format-type  Type
        0             2048         0x00  No Media Present or Unknown Capacity
Blocks total: 359846 Blocks current: 359846 Blocks remaining: 287142
Starting to write CD/DVD/BD at speed 24 in real SAO mode for single session.
Last chance to quit, starting real write in 3 seconds.
2 seconds.
1 seconds.
0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
BURN-Free is OFF.
Turning BURN-Free on
Performing OPC...
Sending CUE sheet...
/opt/schily/bin/cdrecord: WARNING: Drive returns wrong startsec (0) using -150
Writing pregap for track 1 at -150
Starting new track at sector: 0
Track 01:    0 of  142 MB written.
Track 01:    1 of  142 MB written (fifo 100%)   0.5x.
Track 01:    2 of  142 MB written (fifo 100%) [buf 100%]   1.6x.
Track 01:    3 of  142 MB written (fifo 100%) [buf 100%]  11.9x.
Track 01:    4 of  142 MB written (fifo 100%) [buf 100%]  11.6x.
Track 01:    5 of  142 MB written (fifo 100%) [buf 100%]  12.0x.
Track 01:    6 of  142 MB written (fifo 100%) [buf 100%]  11.6x.
Track 01:    7 of  142 MB written (fifo 100%) [buf 100%]  12.0x.
Track 01:    8 of  142 MB written (fifo 100%) [buf 100%]  11.7x.
Track 01:    9 of  142 MB written (fifo 100%) [buf 100%]  12.1x.
Track 01:   10 of  142 MB written (fifo 100%) [buf 100%]  11.7x.
Track 01:   11 of  142 MB written (fifo 100%) [buf 100%]  12.1x.
Track 01:   12 of  142 MB written (fifo 100%) [buf 100%]  11.8x.
Track 01:   13 of  142 MB written (fifo 100%) [buf 100%]  12.2x.
Track 01:   14 of  142 MB written (fifo 100%) [buf 100%]  11.8x.
Track 01:   15 of  142 MB written (fifo 100%) [buf 100%]  12.2x.
Track 01:   16 of  142 MB written (fifo 100%) [buf 100%]  11.9x.
Track 01:   17 of  142 MB written (fifo 100%) [buf 100%]  12.3x.
Track 01:   18 of  142 MB written (fifo 100%) [buf 100%]  11.9x.
Track 01:   19 of  142 MB written (fifo 100%) [buf 100%]  12.3x.
Track 01:   20 of  142 MB written (fifo 100%) [buf 100%]  12.0x.
Track 01:   21 of  142 MB written (fifo 100%) [buf 100%]  12.4x.
Track 01:   22 of  142 MB written (fifo 100%) [buf 100%]  12.0x.
Track 01:   23 of  142 MB written (fifo 100%) [buf 100%]  12.4x.
Track 01:   24 of  142 MB written (fifo 100%) [buf 100%]  12.0x.
Track 01:   25 of  142 MB written (fifo 100%) [buf 100%]  12.5x.
Track 01:   26 of  142 MB written (fifo 100%) [buf 100%]  12.1x.
Track 01:   27 of  142 MB written (fifo 100%) [buf 100%]  12.5x.
Track 01:   28 of  142 MB written (fifo 100%) [buf 100%]  12.1x.
Track 01:   29 of  142 MB written (fifo 100%) [buf 100%]  12.5x.
Track 01:   30 of  142 MB written (fifo 100%) [buf 100%]  12.2x.
Track 01:   31 of  142 MB written (fifo 100%) [buf 100%]  12.6x.
Track 01:   32 of  142 MB written (fifo 100%) [buf 100%]  12.2x.
Track 01:   33 of  142 MB written (fifo 100%) [buf 100%]  12.6x.
Track 01:   34 of  142 MB written (fifo 100%) [buf 100%]  13.0x.
Track 01:   35 of  142 MB written (fifo 100%) [buf 100%]  12.6x.
Track 01:   36 of  142 MB written (fifo 100%) [buf 100%]  13.1x.
Track 01:   37 of  142 MB written (fifo 100%) [buf 100%]  12.7x.
Track 01:   38 of  142 MB written (fifo 100%) [buf 100%]  13.1x.
Track 01:   39 of  142 MB written (fifo 100%) [buf 100%]  12.7x.
Track 01:   40 of  142 MB written (fifo 100%) [buf 100%]  13.2x.
Track 01:   41 of  142 MB written (fifo 100%) [buf 100%]  12.8x.
Track 01:   42 of  142 MB written (fifo 100%) [buf 100%]  13.2x.
Track 01:   43 of  142 MB written (fifo 100%) [buf 100%]  12.8x.
Track 01:   44 of  142 MB written (fifo 100%) [buf 100%]  13.2x.
Track 01:   45 of  142 MB written (fifo 100%) [buf 100%]  12.8x.
Track 01:   46 of  142 MB written (fifo 100%) [buf 100%]  13.3x.
Track 01:   47 of  142 MB written (fifo 100%) [buf 100%]  12.9x.
Track 01:   48 of  142 MB written (fifo 100%) [buf 100%]  13.3x.
Track 01:   49 of  142 MB written (fifo 100%) [buf 100%]  12.9x.
Track 01:   50 of  142 MB written (fifo 100%) [buf 100%]  13.4x.
Track 01:   51 of  142 MB written (fifo 100%) [buf 100%]  13.0x.
Track 01:   52 of  142 MB written (fifo 100%) [buf 100%]  13.4x.
Track 01:   53 of  142 MB written (fifo 100%) [buf 100%]  13.0x.
Track 01:   54 of  142 MB written (fifo 100%) [buf 100%]  13.4x.
Track 01:   55 of  142 MB written (fifo 100%) [buf 100%]  13.0x.
Track 01:   56 of  142 MB written (fifo 100%) [buf 100%]  13.5x.
Track 01:   57 of  142 MB written (fifo 100%) [buf 100%]  13.1x.
Track 01:   58 of  142 MB written (fifo 100%) [buf 100%]  13.5x.
Track 01:   59 of  142 MB written (fifo 100%) [buf 100%]  13.1x.
Track 01:   60 of  142 MB written (fifo 100%) [buf 100%]  13.5x.
Track 01:   61 of  142 MB written (fifo 100%) [buf 100%]  13.2x.
Track 01:   62 of  142 MB written (fifo 100%) [buf 100%]  13.6x.
Track 01:   63 of  142 MB written (fifo 100%) [buf 100%]  13.2x.
Track 01:   64 of  142 MB written (fifo 100%) [buf 100%]  13.6x.
Track 01:   65 of  142 MB written (fifo 100%) [buf 100%]  14.0x.
Track 01:   66 of  142 MB written (fifo 100%) [buf 100%]  13.6x.
Track 01:   67 of  142 MB written (fifo 100%) [buf 100%]  14.1x.
Track 01:   68 of  142 MB written (fifo 100%) [buf 100%]  13.7x.
Track 01:   69 of  142 MB written (fifo 100%) [buf 100%]  14.1x.
Track 01:   70 of  142 MB written (fifo 100%) [buf 100%]  13.7x.
Track 01:   71 of  142 MB written (fifo 100%) [buf 100%]  14.2x.
Track 01:   72 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   73 of  142 MB written (fifo 100%) [buf 100%]   0.1x.
Track 01:   74 of  142 MB written (fifo 100%) [buf 100%]   0.1x.
Track 01:   75 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   76 of  142 MB written (fifo 100%) [buf 100%]   0.1x.
Track 01:   77 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   78 of  142 MB written (fifo 100%) [buf 100%]   0.1x.
Track 01:   79 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   80 of  142 MB written (fifo 100%) [buf 100%]   0.1x.
Track 01:   81 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   82 of  142 MB written (fifo 100%) [buf 100%]   0.1x.
Track 01:   83 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   84 of  142 MB written (fifo 100%) [buf 100%]   0.1x.
Track 01:   85 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   86 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   87 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   88 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   89 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   90 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   91 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   92 of  142 MB written (fifo 100%) [buf 100%]   0.1x.
Track 01:   93 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   94 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   95 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   96 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   97 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   98 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:   99 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  100 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  101 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  102 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  103 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  104 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  105 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  106 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  107 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  108 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  109 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  110 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  111 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  112 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  113 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  114 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  115 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  116 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  117 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  118 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  119 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  120 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  121 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  122 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  123 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  124 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  125 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  126 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  127 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  128 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  129 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  130 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  131 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  132 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  133 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  134 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  135 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  136 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  137 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  138 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  139 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  140 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  141 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01:  142 of  142 MB written (fifo 100%) [buf 100%]   0.2x.
Track 01: Total bytes read/written: 148897792/148897792 (72704 sectors).
Writing  time: 3133.095s
Average write speed   0.3x.
Min drive buffer fill was 100%
Fixating...
Fixating time:   17.058s
/opt/schily/bin/cdrecord: fifo had 2346 puts and 2346 gets.
/opt/schily/bin/cdrecord: fifo was 0 times empty and 2267 times full, min fill was 84%.
BURN-Free was never needed.

cdrecord command:
-----------------------
/opt/schily/bin/cdrecord -v gracetime=2 dev=/dev/sr0 speed=24 -sao driveropts=burnfree -data -tsize=72704s -

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