SCSI Emulation w/ DMA

[David Yeu <dyeu@tulane.edu>]

Hi everyone,

I have SCSI emulation on my CDR drive in order to burn and the like,
but I was confused by the following entries in /var/log/messages...

----------------------------------------------------------------------
Aug  5 12:18:48 localhost kernel: SCSI subsystem driver Revision: 1.00
Aug  5 12:18:19 localhost rc.sysinit: Setting clock  (localtime): Mon
Aug  5 12:18:13 UTC 2002 succeeded
Aug  5 12:18:49 localhost kernel: scsi0 : SCSI host adapter emulation
for IDE ATAPI devices
Aug  5 12:18:19 localhost rc.sysinit: Loading default keymap succeeded
Aug  5 12:18:49 localhost kernel:   Vendor: LITE-ON   Model: LTR-24102B
         Rev: 5S0J
Aug  5 12:18:19 localhost rc.sysinit: Setting default font (lat0-sun16):
   succeeded
Aug  5 12:18:49 localhost kernel:   Type:   CD-ROM        ANSI SCSI
revision: 02
Aug  5 12:18:19 localhost rc.sysinit: Activating swap partitions:  succeeded
Aug  5 12:18:49 localhost kernel: hdc: DMA disabled
-----------------------------------------------------------------------

The last line says that DMA is disabled, but it refers to hdc.  Since
my /dev/cdrom is linked to /dev/scd0, and /dev/cdrecorder is linked
to /dev/sg0, does that mean DMA is working anyhow?  How can I tell?

(I was prompted into peeking around after burning seemed a little
slow..)

Thanks in advance,
Dave.


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