CD/DVD burning SLOW

Neuro · 2006-09-08 21:08:41

Hi,

I have this problem with my Asus A6JC laptop. It's CD/DVD burner is really, really slow. I mean, it says it can write 24x CD speed (4234kb/s) but it usually does at about 10x using k3b. It says it can do 8x DVD (11080 kB/s) but its doing at about but it's at it's best at around 0.9x

I've found this information in k3b faq http://k3b.plainblack.com/faq, but it didn't help as I have DMA enabled (both according to hdparm and dmesg output).

If I run cdrecord dev=/dev/hdb -prcap I get all the nice information about the device capabilities. Check this out:

cdrecord dev=/dev/hdb -prcap
WARNING ! Cannot gain SYS_RAWIO capability !
: Operation not permitted
Cdrecord-Clone 2.01.01a06 (i686-pc-linux-gnu) Copyright (C) 1995-2006 Jg Schilling
NOTE: this is OSS DVD extensions for cdrtools and thus may have bugs
   related to DVD issues that are not present in the original cdrtools. For
   more information see http://crashrecovery.org/oss-dvd.html. The original
   cdrtools author should not be bothered with problems in this version.
cdrecord: Warning: Running on Linux-2.6.17-ARCH
cdrecord: There are unsettled issues with Linux-2.5 and newer.
cdrecord: If you have unexpected problems, please try Linux-2.4 or Solaris.
WARNING ! Cannot gain SYS_RAWIO capability !
: Operation not permitted
scsidev: '/dev/hdb'
devname: '/dev/hdb'
scsibus: -2 target: -2 lun: -2
Warning: Open by 'devname' is unintentional and not supported.
Linux sg driver version: 3.5.27
WARNING ! Cannot gain SYS_RAWIO capability !
: Operation not permitted
Using libscg version 'schily-0.8'.
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   :
Vendor_info    : 'HL-DT-ST'
Identifikation : 'DVDRAM GMA-4082N'
Revision       : 'HJ02'
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 read DVD-RAM media
  Does 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 not read R-W subcode information
  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: 11080 kB/s (CD  62x, DVD  8x)
  Current read  speed: 11080 kB/s (CD  62x, DVD  8x)
  Maximum write speed: 11080 kB/s (CD  62x, DVD  8x)
  Current write speed: 11080 kB/s (CD  62x, DVD  8x)
  Rotational control selected: CLV/PCAV
  Buffer size in KB: 2048
  Copy management revision supported: 1
  Number of supported write speeds: 2
  Write speed # 0: 11080 kB/s CLV/PCAV (CD  62x, DVD  8x)
  Write speed # 1:  5540 kB/s CLV/PCAV (CD  31x, DVD  4x)

Supported CD-RW media types according to MMC-4 feature 0x37:
  Does write multi speed       CD-RW media
  Does write high  speed       CD-RW media
  Does write ultra high speed  CD-RW media
  Does write ultra high speed+ CD-RW media

(note that this is with a Sony DVD-R 8x disc inserted, so CD values are a bit misleading)
I'm actually worried worried about "WARNING ! Cannot gain SYS_RAWIO capability !". I haven't tried burning in Windows, since I haven't installed it yet Anyone could help, please?

Luca Gervasi · 2008-06-19 17:56:42

I have the same problem, plus i can assert that EVEN the usb burner il slow and the system seems slowed itself (like as having dma disabled).

daneel971 · 2008-06-21 20:00:34

If you both are using KDE, try to disable the KDED media manager (Kcontrol -> KDE Components -> Service Manager)

Arch Linux

#1 2006-09-08 21:08:41

CD/DVD burning SLOW

#2 2008-06-19 17:56:42

Re: CD/DVD burning SLOW

#3 2008-06-21 20:00:34

Re: CD/DVD burning SLOW

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