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SCSI NEC CDR-210 problems

SCSI NEC CDR-210 problems

Post by Steven Hovat » Tue, 27 Sep 1994 03:35:46



Whatta deal! Picked up an NEC CDR-210 cd-rom 2X drive, scsi, brought it
home, rebuilt kernel (1.1.48) ,hooked it up, brought system back up with
iso-9660 disk in the drive, and saw the following:

Note this is connected to an AHA-1542B (note the other devices)
(extracted from dmesg output)

<6>Configuring Adaptec at IO:330, IRQ 11, DMA priority 5
<6>scsi0 : Adaptec 1542
<6>scsi : 1 hosts.
<6>  Vendor: ARCHIVE   Model: Python 25501-XXX  Rev: 2.50
<6>  Type:   Sequential-Access                  ANSI SCSI revision: 02
<6>Detected scsi tape st0 at scsi0, id 0, lun 0
<6>scsi0 : reseting for second half of retries.
<6>  Vendor:           Model:                   Rev:
<6>  Type:   CD-ROM                             ANSI SCSI revision: 05
<6>Detected scsi CD-ROM sr0 at scsi0, id 1, lun 0
<6>scsi0 : reseting for second half of retries.
<6>  Vendor: TOSHIBA   Model: MK538FB           Rev: 6062
<6>  Type:   Direct-Access                      ANSI SCSI revision: 02
<6>Detected scsi disk sda at scsi0, id 6, lun 0
<6>scsi0 : reseting for second half of retries.
<6>scsi : detected 1 SCSI tape 1 SCSI cdrom 1 SCSI disk total.
<6>Scd sectorsize = 2048 bytes

----
Device entry:
brw-r--r--   1 root     root      11,   0 Sep 25 14:30 /dev/sr0

What happens when I try to mount the cdrom:

/ ->  mount -t iso9660 /dev/sr0 /cdrom -o ro
mount: wrong fs type, /dev/sr0 already mounted, /cdrom busy, or other error

----
Any ideas? I'm a little worried that the Vendor and model aren't extracted
from the device identification phase. Also a little worried that this pup
isn't working.

Thanks all,
Steve

--
Steven V. Hovater                      (703)318-5839
Software Engineer                      Rational Software Corporation

 
 
 
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1. NEC CDR-210 SCSI CDrom problem

I am trying to control the audio play functions of an NEC CDR-210 CDrom
using a variety of user programs passing SCSI commands to the drive,
via a linux SCSI driver.  The local NEC information person tells me
that this drive is "Quasi-SCSI" which seems to mean that the commands
have a SCSI-like structure, but in some cases use vendor-specific codes
for certain functions and the bytes in the command are similar to but
not identical to the SCSI standard.

Some of the functions are working - some distributed in a patch to xcdplayer
(source unknown) - and a couple that I have added or fixed (some waits
seem to be essential between commands and status requests).  I _can_ play
audio disks, but cannot seek to arbitrary places in the disk.  I know this
can be done for I have observed it when the same drive is controlled by
an MSDOS utility.  In addition, CDromfilesystems mount and function
properly.

The Australian NEC people have provided me with as much information
as they can find, but this does not go beyond a list of command codes.
The command byte content remains elusive.  In particular I would dearly
love to know have to give the drive a CDROMPLAYMSF command (i.e. play
from a particular point in a track).

If anyone can help with information (or pointers to possible sources of
information) I would be grateful.

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