On Thursday 22 Jan 2004 04:05, Mark Knecht wrote:
> QUESTION: how do I test these devices (cdrw and dvdr drives) to
> ensure DMA is still enabled? I cannot figure out yet what parameters
> to give hdparm -I /dev/WHAT?
>
> Wizard root # hdparm -I /dev/cdroms/cdrom0
> /dev/cdroms/cdrom0 not supported by hdparm
If you're using ide-scsi those devices are not supported by hdparm.
(Someone tell me if I'm wrong).
Since moving over to ATAPI yesterday I get:
# hdparm -I /dev/cdroms/cdrom0
/dev/cdroms/cdrom0:
ATAPI CD-ROM, with removable media
Model Number: PIONEER DVD-RW DVR-105
Serial Number: CEDC434146WL
Firmware Revision: 1.30
Standards:
Likely used CD-ROM ATAPI-1
Configuration:
DRQ response: 50us.
Packet size: 12 bytes
Capabilities:
LBA, IORDY(can be disabled)
Buffer size: 64.0kB
DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=240ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* DEVICE RESET cmd
* PACKET command feature set
* Power Management feature set
HW reset results:
CBLID- below Vih
Device num = 1 determined by the jumper
# hdparm /dev/cdroms/cdrom0
/dev/cdroms/cdrom0:
HDIO_GET_MULTCOUNT failed: Invalid argument
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 1 (on)
readahead = 256 (on)
HDIO_GETGEO failed: Invalid argument
Peter
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