[Hardware] Plextor PX-800 портит CD-R при записи на малых скоростях

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Здравствуйте!


Пытаюсь записывать CD-R на приводе Plextor PX-800, задав малую
скорость записи (speed=8 или speed=4):
$ cdrecord -v speed=4 -dao a.iso 

В результате cdrecord выдаёт сообщение об ошибке почти сразу 
после начала записи. (Всю его ругань привожу ниже.) Проблема
наблюдается с самыми разными CD-R матрицами: Verbatim, TDK,
noname.

Если скорость записи не задавать (запускать cdrecord без опции 
speed), диск записывается нормально, на скорости около 22x.



Вопрос -- есть ли способ (и смысл?) заставить Plextor PX-800 и
cdrecord записывать CD-R на малой скорости?


Дистрибутив Мастер 2.4, cdrecord-2.01-alt1a37, Plextor PX-800
работет через эмуляцию SCSI.



Ругань cdrecord-а:

$ cdrecord -v speed=4 -dao a.iso 
Cdrecord-Clone 2.01a37 (i586-alt-linux-gnu) Copyright (C) 1995-2004 JЖrg Schilling
TOC Type: 1 = CD-ROM
scsidev: '0,0,0'
scsibus: 0 target: 0 lun: 0
Linux sg driver version: 3.1.25
Using libscg version 'schily-0.8'.
SCSI buffer size: 64512
atapi: 1
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   : 
Vendor_info    : 'PLEXTOR '
Identifikation : 'DVDR   PX-800A  '
Revision       : '1.00'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Current: 0x0009
Profile: 0x002B 
Profile: 0x001B 
Profile: 0x001A 
Profile: 0x0016 
Profile: 0x0015 
Profile: 0x0014 
Profile: 0x0013 
Profile: 0x0012 
Profile: 0x0011 
Profile: 0x0010 
Profile: 0x000A 
Profile: 0x0009 (current)
Profile: 0x0008 (current)
Profile: 0x0002 
cdrecord: This version of cdrecord does not include DVD-R/DVD-RW support code.
cdrecord: If you need DVD-R/DVD-RW support, ask the Author for cdrecord-ProDVD.
cdrecord: Free test versions and free keys for personal use are at ftp://ftp.berlios.de/pub/cdrecord/ProDVD/
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/R96R
Drive buf size : 890880 = 870 KB
FIFO size      : 4194304 = 4096 KB
Track 01: data   700 MB        
Total size:      804 MB (79:39.29) = 358447 sectors
Lout start:      804 MB (79:41/22) = 358447 sectors
Current Secsize: 2048
ATIP info from disk:
  Indicated writing power: 4
  Is not unrestricted
  Is not erasable
  Disk sub type: Medium Type C, low Beta category (C-) (6)
  ATIP start of lead in:  -11559 (97:27/66)
  ATIP start of lead out: 359846 (79:59/71)
Disk type:    Short strategy type (Phthalocyanine or similar)
Manuf. index: 21
Manufacturer: Ricoh Company Limited
Blocks total: 359846 Blocks current: 359846 Blocks remaining: 1399
Starting to write CD/DVD at speed 8 in real SAO mode for single session.
Last chance to quit, starting real write    0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
BURN-Free is ON.
Turning BURN-Free off
Performing OPC...
Sending CUE sheet...
cdrecord: WARNING: Drive returns wrong startsec (0) using -150
Writing pregap for track 1 at -150
Starting new track at sector: 0
Track 01:    1 of  700 MB written (fifo 100%) [buf 100%]   0.4x.cdrecord: Input/output error. write_g1: scsi sendcmd: no error
CDB:  2A 00 00 00 02 C9 00 00 1F 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: F0 00 03 00 00 01 02 0A 00 00 00 00 0C 08 00 00
Sense Key: 0x3 Medium Error, Segment 0
Sense Code: 0x0C Qual 0x08 (write error - recovery failed) Fru 0x0
Sense flags: Blk 258 (valid) 
cmd finished after 0.048s timeout 200s

write track data: error after 1460224 bytes
cdrecord: A write error occured.
cdrecord: Please properly read the error message above.
Writing  time:   38.579s
Average write speed 187.6x.
Min drive buffer fill was 100%
Fixating...
Fixating time:    0.001s
cdrecord: fifo had 87 puts and 24 gets.
cdrecord: fifo was 0 times empty and 15 times full, min fill was 93%.