Hello All.
I noticed something odd with cdrecord-2.01 and a USB Plextor
on a Blade 2000 running sun solaris 9. Using [1] a speed of
16x cdrecord tells me DMA is too slow [2] and takes the speed
down [3] to 4x. I'm guessing the DMA speed is low because of
the USB, and maybe the blade 2000 does not have hi-speed
usb..hmm..
After done burning [4] at 4x, cdrecord reports it used 16x, and there
were 44 predicted buffer underruns. hmmm...
Trying a burn at 4x (explicitly) [5], reports a burn speed of 4x, with
no underruns and that burnfree was not needed.
I'm grateful for all the work Mr. Schilling has done on the cdrtools
package. I am just curious if I need to use some different option to
burn with, or what is exactly happening. Does anyone know for sure if
the Blade's are only USB 1.0 ?
I tried to keep the amount of post brief, so maybe I snipped out
some important info. Let me know.
Thanks!
--------------------------------------------------------------------------- [1] [2] [3] [4] <snip> Total rockridge attributes bytes: 104666 Track 01: 654 MB written (fifo 100%) [buf 32%] 4.8x. Track 01: writing 30 KB of pad data. [5] [6] Track 01: 654 MB written (fifo 100%) [buf 98%] 4.2x. Track 01: writing 30 KB of pad data.
/usr/local/bin/mkisofs -graft-points -f -R -r -l -J --
foo/=/foo_650M/|cdrecord -v -dummy -eject -pad dev=3,0,0 speed=16
fs=16m driveropts=burnfree -
Drive DMA Speed: 799 kB/s 4x CD 0x DVD
Starting to write CD/DVD at speed 4 in dummy TAO mode for single
session.
Cdrecord-Clone 2.01 (sparc-sun-solaris2.9) Copyright (C) 1995-2004
J?rg Schilling
TOC Type: 1 = CD-ROM
scsidev: '3,0,0'
scsibus: 3 target: 0 lun: 0
Warning: Using USCSI interface.
Using libscg version 'schily-0.8'.
Driveropts: 'burnfree'
SCSI buffer size: 64512
atapi: 0
Device type : Removable CD-ROM
Version : 0
Response Format: 1
Vendor_info : 'PLEXTOR '
Identifikation : 'DVDR P0042000B'
Revision : '56'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Total directory bytes: 174080
Path table size(bytes): 1076
Max brk space used cc000
335331 extents written (654 MB)
Track 01: Total bytes read/written: 686757888/686788608 (335346
sectors).
Writing time: 989.614s
Min drive buffer fill was 0%
Total of 44 possible drive buffer underruns predicted.
Fixating...
WARNING: Some drives don't like fixation in dummy mode.
Fixating time: 0.026s
Last selected write speed: 16x
Max media write speed: 16x
Last actual write speed: 16x
resid: 4
BURN-Free was 133 times used.
cdrecord: fifo had 10819 puts and 10819 gets.
cdrecord: fifo was 0 times empty and 9568 times full, min fill was 98%.
/usr/local/bin/mkisofs -graft-points -f -R -r -l -J -- foo/=/foo_650M/
| cdrecord -v -dummy -eject -pad dev=3,0,0 speed=4 fs=16m
driveropts=burnfree -
Total rockridge attributes bytes: 104666
Total directory bytes: 174080
Path table size(bytes): 1076
Max brk space used cc000
335331 extents written (654 MB)
Track 01: Total bytes read/written: 686757888/686788608 (335346
sectors).
Writing time: 1126.231s
Min drive buffer fill was 98%
Fixating...
WARNING: Some drives don't like fixation in dummy mode.
Fixating time: 0.026s
Last selected write speed: 4x
Max media write speed: 16x
Last actual write speed: 4x
resid: 4
BURN-Free was never needed.
cdrecord: fifo had 10819 puts and 10819 gets.
cdrecord: fifo was 0 times empty and 9735 times full, min fill was 96%.