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Terrible performance while burning CDS
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rcl
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Joined: 02 Dec 2003
Posts: 5

PostPosted: Tue Dec 02, 2003 3:39 am    Post subject: Terrible performance while burning CDS Reply with quote

I get extremely bad performance when I burn CDS. This happens using both cdrdao and cdrecord.

The symptoms (this gets worse as I increase burn speed) are:

- fairly slow write, if I do not have burnproof buffering on, my writes always fail

- every few seconds (more frequent if I am burning at a higher speed) my box becomes completely unresponsive, it even loses characters while I am typing etc

- if I put a CD with or WITHOUT data on it in my tray, one of 2 things happens.
....A) the green light comes on, goes right off, and I can mount/use the CD perfectly fine
....B) the green light stays on for a very long time, eventually turns off, and my box does not recognize a CD is in the drive
if B happens, I fix this by opening and closing the drive tray. This is COMPLETELY random it seems. Sometimes it will be fine for several cds at a time and then hokey for a while.

I do not know what I should be checking, here is all the data that I see relevant. Please, if you need me to check other things let me know - this problem has plagued me for over a year now and I am sick and tired of it (and nobody on irc seems to have any suggestions, and I can't seem to find any truly similar problems on google)

From dmesg
Code:

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: IDE controller at PCI slot 0000:00:07.1
VP_IDE: chipset revision 6
VP_IDE: not 100% native mode: will probe irqs later
VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci0000:00:07.1
ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:DMA
ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:pio, hdd:DMA
hda: MAXTOR 6L080J4, ATA DISK drive
hdb: MAXTOR 6L060J3, ATA DISK drive
Using anticipatory scheduling io scheduler
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hdd: LITE-ON LTR-12101B, ATAPI CD/DVD-ROM drive
ide1 at 0x170-0x177,0x376 on irq 15
hda: max request size: 128KiB
hda: 156355584 sectors (80054 MB) w/1819KiB Cache, CHS=65535/16/63, UDMA(100)
/dev/ide/host0/bus0/target0/lun0: p1 p2 p3
hdb: max request size: 128KiB
hdb: 117266688 sectors (60040 MB) w/1819KiB Cache, CHS=65535/16/63, UDMA(100)


and this is when I load ide-scsi module, which loads my cdrom driver
Code:

scsi1 : SCSI host adapter emulation for IDE ATAPI devices
  Vendor: LITE-ON   Model: LTR-12101B        Rev: LS38
  Type:   CD-ROM                             ANSI SCSI revision: 02
  sr0: scsi3-mmc drive: 32x/32x writer cd/rw xa/form2 cdda tray
Uniform CD-ROM driver Revision: 3.12
Attached scsi CD-ROM sr0 at scsi1, channel 0, id 0, lun 0
Attached scsi generic sg0 at scsi1, channel 0, id 0, lun 0,  type 5


Any help would be appreciated!
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DocGonzo
Tux's lil' helper
Tux's lil' helper


Joined: 14 Nov 2002
Posts: 133
Location: Wuerzburg/Germany

PostPosted: Tue Dec 02, 2003 4:36 pm    Post subject: Reply with quote

You have your CD drive on hdd and nothing on hdc?
Try to switch your CD drive to Master instead of Slave, and look if that helps.

I have also a LITEON CD Burner and compared to my new DVD Burner it shows absolutly weak performance. I thougt this is because the CD Burner is the slave of my first IDE controler together with my harddisk. But maybe these Drives ar just crap :roll: . The DVD Burner works flawlessly (also a slave device). Maybe I will look for a firmware update.
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rcl
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Joined: 02 Dec 2003
Posts: 5

PostPosted: Thu Dec 11, 2003 7:47 pm    Post subject: Reply with quote

*** edit
I thought that switching to Master did nothing, but I was not correct. When burning normal data cds with (cdrecord -v speed=12 dev=0,0,0 driveropts=burnproof /path/to/image.iso) everything works PERFECTLY. This did not used to be the case, so thank you for a solution that at least fixed that problem.

When I burn using cdrdao, problems still persist. Additionally, I still have the issue that when I put a cd in the drive it frequently will just 'spin' and not read it.
*** end of edit

Perhaps it is a problem with the drive itself (more accurately with the linux support existing for it). I'm sure other people use this drive; can anybody share their positive or negative experience with it, so I can get some clues?

Still looking for suggestions,
Robert
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rcl
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Joined: 02 Dec 2003
Posts: 5

PostPosted: Sat Dec 13, 2003 8:43 pm    Post subject: Reply with quote

bumping b/c I thought my edit would, but it didn't 8)
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