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SubjectUnable to set reading speed with newer DVD -reader.
Date
Hi,
There is a problem with setting DVD reading speed.
I found a thread[1] dealing with this, but there is only a scarse mention
about SET_STREAMING in <linux/cdrom.h>.

[1] http://groups.google.com/groups?threadm=20010627194127.H17905%40suse.de

Thanks.
- -
# uname -a
Linux tienel 2.6.4-rc1-mm2 #1 SMP Fri Mar 5 18:22:38 EET 2004 i686 GNU/Linux
- -
# # Without DVD-Video -disk in reader
# hdparm -E 4 /dev/dvd

/dev/dvd:
setting cdrom speed to 4

- -
# # With DVD-Video -disk in reader.
# hdparm -E 4 /dev/dvd

/dev/dvd:
setting cdrom speed to 4
CDROM_SELECT_SPEED failed: Input/output error
- -
# tail /var/log/messages
...
Mar 11 23:11:07 tienel kernel: hdb: packet command error: status=0x51 { DriveReady SeekComplete Error }
Mar 11 23:11:07 tienel kernel: hdb: packet command error: error=0x54
Mar 11 23:11:07 tienel kernel: ATAPI device hdb:
Mar 11 23:11:07 tienel kernel: Error: Illegal request -- (Sense key=0x05)
Mar 11 23:11:07 tienel kernel: Invalid field in command packet -- (asc=0x24, ascq=0x00)
Mar 11 23:11:07 tienel kernel: The failed "Set Speed" packet command was:
Mar 11 23:11:07 tienel kernel: "bb 00 02 c4 00 00 00 00 00 00 00 00 00 00 00 00 "
- -
# hdparm -I /dev/dvd

/dev/dvd:

ATAPI CD-ROM, with removable media
Model Number: SAMSUNG DVD-ROM SD-616E
Serial Number:
Firmware Revision: F502
Standards:
Used: ATAPI for CD-ROMs, SFF-8020i, r2.5
Supported: CD-ROM ATAPI-2
Configuration:
DRQ response: 50us.
Packet size: 12 bytes
Capabilities:
LBA, IORDY(can be disabled)
DMA: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 udma2 (?)
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
- -


--
Psi -- <http://www.iki.fi/pasi.savolainen>

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