[linux-audio-user] A real problem (DVD)

[Matt Barber]

Hi,

Here's something that's been stumping me:


Our DVD drive (Plextor 708A) can read and mount CDroms and it can play
CD-Audio, but it can't read or write DVDs (anything that tries to use it
gives a "no medium found" error).  

$ mount /dev/cdrom
mount: No medium found

similar error message with k3b...

The problem is not playing DVDs with xine or anything like that - I
can't get the drive to even acknowledge there's anything in it.


Some computer info:


Dual Opteron (tyan thunder mobo)
SATA hard drives (western digital)

Fedora 2 planetccrma setup:

$ uname -r
2.6.7-1.437.1.ll.rhfc2.ccrmasmp

(using this kernel for now because cdburning in other newer kernels
hardlocks the system -- through 2.6.8.1... haven't tested past that)

here's something from /var/log/messages I get when I put in a DVD:

Nov 30 12:07:30 madking kernel: hda: packet command error: status=0x51 {
DriveReady SeekComplete Error }
Nov 30 12:07:30 madking kernel: hda: packet command error: error=0x44
Nov 30 12:07:30 madking kernel: ATAPI device hda:
Nov 30 12:07:30 madking kernel:   Error: Hardware error -- (Sense
key=0x04)
Nov 30 12:07:30 madking kernel:   Tracking servo failure -- (asc=0x09,
ascq=0x01)
Nov 30 12:07:30 madking kernel:   The failed "Read Cd/Dvd Capacity"
packet command was:
Nov 30 12:07:30 madking kernel:   "25 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 "


the corresponding dmesg lines:

cdrom: open failed.
hda: packet command error: status=0x51 { DriveReady SeekComplete Error }
hda: packet command error: error=0x44
ATAPI device hda:
  Error: Hardware error -- (Sense key=0x04)
  Tracking servo failure -- (asc=0x09, ascq=0x01)
  The failed "Read Cd/Dvd Capacity" packet command was:
  "25 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "





cd drive info:

cdrecord -scanbus    

when run as user:

scsibus0:
        0,0,0     0) 'PLEXTOR ' 'DVDR   PX-708A  ' '1.04' Removable
CD-ROM
        0,1,0     1) *
        0,2,0     2) *
        0,3,0     3) *
        0,4,0     4) *
        0,5,0     5) *
        0,6,0     6) *
        0,7,0     7) *

when run as root:

scsibus0:
        0,0,0     0) '' '' '' Disk
        0,1,0     1) *
        0,2,0     2) *
        0,3,0     3) *
        0,4,0     4) *
        0,5,0     5) *
        0,6,0     6) *
        0,7,0     7) *
scsibus1:
        1,0,0   100) '' '' '' Disk
        1,1,0   101) *
        1,2,0   102) *
        1,3,0   103) *
        1,4,0   104) *
        1,5,0   105) *
        1,6,0   106) *
        1,7,0   107) *



$ cat /proc/sys/dev/cdrom/info
CD-ROM information, Id: cdrom.c 3.20 2003/12/17
 
drive name:             hda
drive speed:            40
drive # of slots:       1
Can close tray:         1
Can open tray:          1
Can lock tray:          1
Can change speed:       1
Can select disk:        0
Can read multisession:  1
Can read MCN:           1
Reports media changed:  1
Can play audio:         1
Can write CD-R:         1
Can write CD-RW:        1
Can read DVD:           1
Can write DVD-R:        1
Can write DVD-RAM:      0
Can read MRW:           1
Can write MRW:          1
Can write RAM:          1





hdparm info:

$ hdparm /dev/hda
 
/dev/hda:
 HDIO_GET_MULTCOUNT failed: Invalid argument
 IO_support   =  3 (32-bit w/sync)
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument


$ hdparm -tT /dev/hda
 
/dev/hda:
read() failed: Input/output error
 Timing buffered disk reads:  read() failed: Input/output error


Not sure what other info to give.  I don't have much of a way to
troubleshoot the problem by process of elimination - I have a Pioneer
drive that I can try later today...  we have another box with the same
kernel, but it's a P4 and uses IDE drives.  My instinct is that it's
some kind of conflict between IDE and SCSI, but it could be a problem
with the 64-bit processors (using x86, though, not x86_64, which is not
available on planetccrma yet) or it could be an smp thing (if it's not
the drive) -- lame segfaults on the opteron box but not on the P4 box,
so I think that is probably a 64bit/smp issue, and so this DVD problem
could be similar.  I will try the other drive later today and see if it
makes a difference.

Thanks,

Matt