Newsgroup: it.comp.hardware.cd
Titolo: New 7502B won't mount - please help

This is my first foray into CD-R, and for the life of me I can't get
this new Panasonic to write, read, or even mount.  What follows is
information on the unit, what it is connected to, a better description
of problem, and what I've tried thus far.  I am out of ideas, so it's
time to ask the experts.  If you've seen this problem before or have a
suggestion please don't hesitate.
     ----------  Information about the Unit ----------
The number below the first bar code is:  8617ZDC69256.  I have read this
would break down as follows:
8=  Manufactured in 1998
6=  Manufactured in the 6th month (June)
17=  Day of Manufacture (17th)
ZD=  Means nothing to the consumer
C=  Revision letter of the drive
69256=  Serial Number of the drive
Drive arrived with current (revision 4.10) firmware.
     ----------  Information about Computer ----------
Basic G3 233mhz, revision 2 desktop model with 8.1 installed.  All other
SCSI devices were removed while attempting to get the 7502 to mount
(except where noted).
     ----------  The Problem ----------
The unit refuses to read, write, or mount to the desktop.  The drive
does appear on the SCSI chain as:
MATSHITACD-R CW-7502
The firmware also shows as being current (version 4.10).  When I run the
"Self Test" which is part of Adaptec's Toast software it returns the
following:
Sense Key = ILLEGAL REQUEST
Sense Code = Ox20
INVALID COMMAND OPERATION CODE
This is what the drive does when it is turned on and a disk (any disk:
Bootable CD, music CD, or blank CD-R) is inserted:
- The "Busy" light comes on, and stays on until noted below.
- The drive spins up (the spindle can be seen through clear peephole).
- After about 5 seconds, it spins back down.
- It does this five times, and on the 5th time does something different:
      - it keeps spinning and for the first time I can hear (and feel)
         the mechanism move.
      - For about 2 seconds it sounds like it is accessing the disk.
      - It does this twice.
      - then the "Busy" light goes out.
      - then it does it one more time... 
      - ... and spins down.
This is what it does when just the drive-- not the computer--is turned
on.  The drive does recognize when the CPU is turned on, and the busy
light does come on when the SCSI chain cranks up other drives.  Then it
runs through the exact same steps listed above and never mounts.
     ----------  What I've tried thus far... ----------
- I've connected the drive to both the internal and external SCSI chain.
While on the external chain, and in an enclosure that works fine with a
hard disk, I also tried starting up with both active and passive
termination on the back of the box (which is the end of the chain).
This should not be necessary, as the drive is pinned per the defaults
listed in the manual, which are:
-  Termination=ON
-  Termination Power=ON
-  Parity=ON
-  Tried every SCSI ID between 1 and 6.
-  Tried removing the termination and putting it in the middle of the
SCSI chain.
-  Tried every combination & load order for these:
     - Apple's CD/DVD extension 
     - Adaptec's "Toast CD Reader" extension
     - HDT's application/extension set to mount removable disks
- Tried different internal and external cables.
- I have not hooked up the "sound out" or the ground terminal, if this
makes any difference.  I did ground it manually just to check.  No
change.
- A power search of Deja News located several posts where 7502s
exhibited similar behavior and generated the same error messages, but
none offered a fix that I haven't tried.  There was more than one post
that indicates it's a SCSI problem, but none of them elaborate.  Most of
these posts were months back and were solved via updated firmware
updates.
- Just on the off chance that something went wrong with the firmware
flash at the factory, I reloaded the same (4.10) firmware.  The install
went fine, but it resulted in no change.
So.  Thanks for reading this far!  I'm open to any & all suggestions as
to what needs to be tried before I exchange this puppy.  Thanks,
Bill Riggins
rig...@bellsouth.net

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