On Sun, 25 Mar 2001, Urban Petry wrote:
> Hi Craig,
>
> I'm using the ADIC-1200 as well (although with linux instead of sunos,
> mtx is the same as yours - 1.2.10).
Which device driver are you using under Linux? The equivalent of Sun's
'sgen' driver? I am going to try the 'sst' driver supplied with Amanda
today and see if I get a different result. According to the manual, the
factory defaults are ID 0 for the drive and ID 3 for the robotics.
Are you using your ADIC-1200 in random-access or sequential mode? Mine is
set to random-access mode with the jumper installed on the small PCB
inside the front of the autochanger door.
> > # mtx -f /dev/scsi/changer/c0t5d0 inquiry
> > Product Type: Medium Changer
> > Vendor ID: 'ADIC '
> > Product ID: 'DAT AutoChanger '
> > Revision: '0461'
> > Attached Changer: No
>
> > So far, this is good, but I'm not quite sure why it reported the last
> > piece of information as 'No'.
>
> I get the same information when running mtx inquiry (only you got a
> newer revision ;-), so that shouldn't be a problem. AFAIK the
> 'Attached Changer' is only yes if your tape changer and tape drive
> listen to the same scsi ID and thus understand both streamer and
> changer scsi commands (maybe different LUNs). But that's not the case
> with the ADIC.
They're set to different ID's. The Sony drive is ID 4, and the robotics
are ID 5.
> > # mtx -f /dev/scsi/changer/c0t5d0 status
> > mtx: no Data Transfer Element reported
>
> Hmm, have you checked the SCSI ID settings on the back of the unit ?
> The only situation that could lead to such an error is in my opinion
> (and to my knowledge) that both the changer and the tape device have
> the same ID set, so the changer can't find its streamer. Is the tape
> device listed seperately when you list all your scsi devices on that
> bus ?
I might alter the ID settings so the robotics are on a lower ID that the
drive, but it should be irrelevant providing the ID's are actually
different.
> Regarding your question about replacing the shipped drive with a newer
> model: The same thing came to my mind as well. I already opened the
> case to find out, that it should be possible to replace the existing
> drive with another one. It shoud work as long as it's the same brand,
> because I have the feeling that the changer device snoops on the tape
> device messages on the scsi bus and I don't know how well they're
> standardized (e.g. the arm doesn't try to grab a tape out of the tape
> drive before unloading the whole cartridge unless you issued an eject
> command to the _tape drive_ before ...). If you have any success with
> this, please let me know (although I have a HP drive instead of a
> sony).
If I actually do this, I will let you know how it goes. I think you might
be right about the changer electronics watching SCSI activity for the
drive. There's quite a lot of smarts on the robotics control board,
judging by the ammount of hardware on the changer PCB.
Regards,
Craig.
--
Craig Dewick. Send email to "[EMAIL PROTECTED]"
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