система - sarge 3.1r1 на p4/i925, ядро 2.6.8 

на единственном pata интерфейсе висят samsung 160 gb hdd и nec dvd_rw
nd-3550a (master/slave соответственно)

читается все нормально а вот с записью дисков проблемы :(
компьютер при этом практически зависает 

hdparm утверждает что dma в порядке, да оно и так чувствуется 
пытался настроить cdrecord как через ide-scsi так и через atapi - все
одно практически виснет при записи (но при этом пишет)
в логах ничего интересного не обнаружил

как бы побороть этот глюк ?

вот что говорит cdrecord

Using libscg version 'schily-0.8'.
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   : 
Vendor_info    : '_NEC    '
Identifikation : 'DVD_RW ND-3550A '
Revision       : '1.05'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.

Drive capabilities, per MMC-3 page 2A:

  Does read CD-R media
  Does write CD-R media
  Does read CD-RW media
  Does write CD-RW media
  Does read DVD-ROM media
  Does read DVD-R media
  Does write DVD-R media
  Does not read DVD-RAM media
  Does not write DVD-RAM media
  Does support test writing

  Does read Mode 2 Form 1 blocks
  Does read Mode 2 Form 2 blocks
  Does read digital audio blocks
  Does restart non-streamed digital audio reads accurately
  Does support Buffer-Underrun-Free recording
  Does read multi-session CDs
  Does read fixed-packet CD media using Method 2
  Does not read CD bar code
  Does read R-W subcode information
  Does not return R-W subcode de-interleaved and error-corrected
  Does read raw P-W subcode data from lead in
  Does return CD media catalog number
  Does return CD ISRC information
  Does support C2 error pointers
  Does not deliver composite A/V data

  Does play audio CDs
  Number of volume control levels: 256
  Does support individual volume control setting for each channel
  Does support independent mute setting for each channel
  Does not support digital output on port 1
  Does not support digital output on port 2

  Loading mechanism type: tray
  Does support ejection of CD via START/STOP command
  Does not lock media on power up via prevent jumper
  Does allow media to be locked in the drive via PREVENT/ALLOW command
  Is currently in a media-locked state
  Does not support changing side of disk
  Does not have load-empty-slot-in-changer feature
  Does not support Individual Disk Present feature

  Maximum read  speed:  8467 kB/s (CD  48x, DVD  6x)
  Current read  speed:  8467 kB/s (CD  48x, DVD  6x)
  Maximum write speed:  5645 kB/s (CD  32x, DVD  4x)
  Current write speed:  5645 kB/s (CD  32x, DVD  4x)
  Rotational control selected: CLV/PCAV
  Buffer size in KB: 2048
  Copy management revision supported: 1
  Number of supported write speeds: 4
  Write speed # 0:  5645 kB/s CLV/PCAV (CD  32x, DVD  4x)
  Write speed # 1:  4234 kB/s CLV/PCAV (CD  24x, DVD  3x)
  Write speed # 2:  2822 kB/s CLV/PCAV (CD  16x, DVD  2x)
  Write speed # 3:  1411 kB/s CLV/PCAV (CD   8x, DVD  1x)



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