CD Rom very slow

maginotjr · 08-12-2005, 11:31 AM

I have a notebook with a CDRW 24x16x4 (or something like that) speed. But when Im burning cds in linux I can only burn at 4x ... more than this give me an error. I know that it writes faster because in windows I can write at 16x and 4x for CDRW

Anyone knows why?

Tuttle · 08-12-2005, 12:01 PM

Is dma enabled? Open a terminal, type "su -", enter root password and type "hdparm -d /dev/hdc" if hdc is your burner. Typing "hdparm -d1 /dev/hdc" in the same terminal (as root) will attempt to set dma to 1.

maginotjr · 08-12-2005, 12:42 PM

good question!

I have totaly forgot of checking that!

WHen I get home I will check that... thanks!

maginotjr · 08-13-2005, 03:22 PM

DMA is on ...

so what can be causing this problem?

Tuttle · 08-13-2005, 07:46 PM

The best way to find out is to burn in a root terminal using the command:

Code:

cdrecord dev=ATAPI:/dev/hdc image.iso

where "image.iso" is a test iso image ready for burning (see mkisofs) and /dev/hdc is the name of your (atapi) cdrw device.
Read the output and post any interesting messages.

killerbob · 08-13-2005, 11:25 PM

What program are you using to burn, and what else do you have running at the time?

You could be running up against a program that isn't savvy enough to use your CDROM's full buffer. Say you've got a 16mb buffer on the burner, and the program is only using 2mb. Result? At higher burning speeds, the bugger underruns and you get an error. I'd suggest you try a different program to see if you get the same error.

maginotjr · 08-14-2005, 01:26 AM

Im using nautilus to burn cds or k3b ... both only burns at 4x ... if the speed is more them 4x I get an error...
my drive is a DW-P50A with firmware 1.8f ....

Tuttle · 08-14-2005, 04:45 AM

in other words, cdrecord.

maginotjr · 08-15-2005, 05:34 PM

well.. with cdrecord I get an error ... and noting happens, this is the output:

Code:

cdrecord: Future versions of cdrecord may have different drive dependent defaults.
cdrecord: Continuing in 5 seconds...
Cdrecord-Clone 2.01 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling
cdrecord: Warning: Running on Linux-2.6.12.3
cdrecord: There are unsettled issues with Linux-2.5 and newer.
cdrecord: If you have unexpected problems, please try Linux-2.4 or Solaris.
scsidev: 'ATAPI:/dev/hdc'
devname: 'ATAPI:/dev/hdc'
scsibus: -2 target: -2 lun: -2
Warning: Using ATA Packet interface.
Warning: The related Linux kernel interface code seems to be unmaintained.
Warning: There is absolutely NO DMA, operations thus are slow.
Using libscg version 'schily-0.8'.
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   :
Vendor_info    : 'SONY    '
Identifikation : 'DVD+RW DW-P50A  '
Revision       : '1.8f'
Device seems to be: Generic mmc2 DVD-ROM.
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
cdrecord: DMA speed too slow (OK for 10x). Cannot write at speed 16x.
cdrecord: Max DMA data speed is 10.
cdrecord: Try to use 'driveropts=burnfree'.

maginotjr · 08-15-2005, 05:40 PM

using cdrecord with speed=10 I get this (I think I lost a CD):

Code:

sing 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
Starting to write CD/DVD at speed 8 in real TAO mode for single session.
Last chance to quit, starting real write    0 seconds. Operation starts.
Turning BURN-Free off
cdrecord: Input/output error. write_g1: scsi sendcmd: no error
CDB:  2A 00 00 00 48 4B 00 00 1F 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: F1 00 03 00 00 38 E5 12 00 00 00 00 0C 00 00 00 00 00 00 00 00 00 00 00 00 00
Sense Key: 0x3 Medium Error, deferred error, Segment 0
Sense Code: 0x0C Qual 0x00 (write error) Fru 0x0
Sense flags: Blk 14565 (valid)
cmd finished after 2.530s timeout 40s
write track data: error after 37902336 bytes
cdrecord: A write error occured.
cdrecord: Please properly read the error message above.
cdrecord: Input/output error. close track/session: scsi sendcmd: no error
CDB:  5B 00 02 00 00 00 00 00 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: F0 00 03 00 00 39 24 12 00 00 00 00 0C 08 00 00 00 00 00 00 00 00 00 00 00 00
Sense Key: 0x3 Medium Error, Segment 0
Sense Code: 0x0C Qual 0x08 (write error - recovery failed) Fru 0x0
Sense flags: Blk 14628 (valid)
cmd finished after 5.040s timeout 480s
cmd finished after 5.040s timeout 480s
cdrecord: Cannot fixate disk.

This drive must write at 16x (I already writed at 16x... I think the problem start after the firmware update to 1.8f, but I didnt find anyone reporting any problem).... :/

maginotjr · 08-15-2005, 05:41 PM

Code:

#mount /mnt/cdrom
mount: wrong fs type, bad option, bad superblock on /dev/cdrom,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

# dmesg | tail
[drm] Initialized radeon 1.16.0 20050311 on minor 0: ATI Technologies Inc Radeon IGP 330M/340M/350M
mtrr: 0xd8000000,0x4000000 overlaps existing 0xd8000000,0x2000000
agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0.
agpgart: Putting AGP V2 device at 0000:00:00.0 into 4x mode
agpgart: Putting AGP V2 device at 0000:01:05.0 into 4x mode
cdrom: This disc doesn't have any tracks I recognize!
scsi: unknown opcode 0x01
attempt to access beyond end of device
hdc: rw=0, want=68, limit=4
isofs_fill_super: bread failed, dev=hdc, iso_blknum=16, block=16

Tuttle · 08-15-2005, 05:43 PM

Quote:

Originally posted by maginotjr
well.. with cdrecord I get an error ... and noting happens, this is the output:

Code:

cdrecord: Future versions of cdrecord may have different drive dependent defaults.
cdrecord: Continuing in 5 seconds...
Cdrecord-Clone 2.01 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling
cdrecord: Warning: Running on Linux-2.6.12.3
cdrecord: There are unsettled issues with Linux-2.5 and newer.
cdrecord: If you have unexpected problems, please try Linux-2.4 or Solaris.
scsidev: 'ATAPI:/dev/hdc'
devname: 'ATAPI:/dev/hdc'
scsibus: -2 target: -2 lun: -2
Warning: Using ATA Packet interface.
Warning: The related Linux kernel interface code seems to be unmaintained.
Warning: There is absolutely NO DMA, operations thus are slow.
Using libscg version 'schily-0.8'.
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   :
Vendor_info    : 'SONY    '
Identifikation : 'DVD+RW DW-P50A  '
Revision       : '1.8f'
Device seems to be: Generic mmc2 DVD-ROM.
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
cdrecord: DMA speed too slow (OK for 10x). Cannot write at speed 16x.
cdrecord: Max DMA data speed is 10.
cdrecord: Try to use 'driveropts=burnfree'.

It says "no dma, no high speed"

You may want to try scsi emulation, there is lots of help on lq for this, but it does require you to (possibly) re-compile your kernel and put this into your lilo.conf file:

Code:

append = "/dev/hdc=ide-scsi"

where hdc is your burner. (run lilo afterwards)
After a reboot try "cdrecord -scanbus"

maginotjr · 08-15-2005, 08:53 PM

I have ide-scsi module, its always loaded, and I have dma in my cdrom:

Code:

dealer@slackbox:~$ lsmod
Module                  Size  Used by
radeon                 76800  1
drm                    60948  2 radeon
snd_pcm_oss            48288  0
snd_mixer_oss          17408  1 snd_pcm_oss
parport_pc             22724  0
parport                20928  1 parport_pc
rtc                    10936  0
ati_agp                 7180  1
usbhid                 32736  0
uhci_hcd               30352  0
ehci_hcd               29704  0
usbcore               108924  4 usbhid,uhci_hcd,ehci_hcd
ohci1394               32436  0
ieee1394               90676  1 ohci1394
joydev                  8256  0
evdev                   7552  0
pcmcia                 21512  2
yenta_socket           20744  1
rsrc_nonstatic         11392  1 yenta_socket
pcmcia_core            43416  3 pcmcia,yenta_socket,rsrc_nonstatic
ide_scsi               14468  0
agpgart                29896  2 drm,ati_agp

Code:

root@slackbox:/home/dealer# hdparm /dev/hdc

/dev/hdc:
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  0 (off)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument

cathectic · 08-15-2005, 09:34 PM

1) Instead of 'dev=ATAPI:/dev/hdc', try 'dev=/dev/hdc'

2) IIRC, ide-scsi is broken in 2.6?

maginotjr · 08-15-2005, 09:45 PM

Im realy thinking about going back with a previous firmware version ...