Sounds strange but that's not unusual with SCSI devices. I've been
dealing with SCSI voodoo magic for almost 16 years now.

What type of SCSI is this? LVD or HVD? How many drives do you have
connected in the same SCSI channel? Is the robotics connected in the
same string?

What type of scsi cables and/or terminators are you using? If you aren't
using Granite Digital cables, I would recommend switching to them
(http://www.granitedigital.com/catalog/indx_scsi.htm).

My recommendation if you have the room in the server to have a separate
SCSI card that connects to the robotics, and an additional card or
separate channel for each 3-4 tape drives. The tape drives and robotics
shouldn't be on any chain with disk drives. 

BTW, about a year ago we finally punted SCSI for backups. We are using
all native FC devices and 95% of my backup problems have gone away.
----
Matthew Huff           | One Manhattanville Rd
Director of Operations | Purchase, NY 10577
OTA LLC                | Phone: 914-460-4039 
http://www.otaotr.com  | Fax:   914-460-4139     

> -----Original Message-----
> From: Legato NetWorker discussion 
> [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On Behalf Of Matthew Huff
> Sent: Tuesday, August 16, 2005 4:33 PM
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: Re: [Networker] Jukebox - expected tape, got NULL
> 
> Do you get any scsi errors on the console or in /var/adm/messages?
> 
> ----
> Matthew Huff           | One Manhattanville Rd
> Director of Operations | Purchase, NY 10577
> OTA LLC                | Phone: 914-460-4039 
> http://www.otaotr.com  | Fax:   914-460-4139     
> 
> > -----Original Message-----
> > From: Legato NetWorker discussion
> > [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On Behalf Of Brian C. Huffman
> > Sent: Tuesday, August 16, 2005 3:20 PM
> > To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> > Subject: [Networker] Jukebox - expected tape, got NULL
> > 
> > All,
> > 
> > I have been experiencing drive problems since I can remember. 
> >  I have replaced a lot of drives, but I'm never quite sure 
> if it's the 
> > drive, the tape, or the software.
> > 
> > I'm running 6.1.4 on a Solaris Server connected to an ATL-P7000 
> > library.
> > The drive in question is an SDLT 220.  
> > 
> > I got these errors in the logs:
> > 
> > 08/13/05 07:16:03 nsrd: media warning: /dev/rmt/37cbn
> > opening: I/O error
> > 08/13/05 07:16:03 nsrd: media warning: /dev/rmt/37cbn
> > reading: read open error, I/O error
> > 08/13/05 07:16:04 nsrd: /dev/rmt/37cbn Eject operation in progress
> > 08/13/05 07:20:05 nsrd: media warning: /dev/rmt/37cbn
> > opening: I/O error
> > 08/13/05 07:20:39 nsrd: Jukebox 'ATL-P7000' failed: expected volume 
> > 'FNQ688' got 'NULL'.
> > 
> > The drive then goes into service mode.
> > 
> > Any idea what could cause this?  This drive is new (or at least
> > refurbished) and has even had a cleaning tape run through it. 
> >  The tapes seems to load, verify label, and mount fine on 
> another SDLT 
> > drive.
> > 
> > Thanks,
> > Brian
> > 
> > --
> > Note: To sign off this list, send a "signoff networker" 
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> > you can also view and post messages to the list. Questions 
> regarding 
> > this list should be sent to stan AT temple DOT edu 
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> 
> --
> Note: To sign off this list, send a "signoff networker" 
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> regarding this list should be sent to stan AT temple DOT edu 
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> 

--
Note: To sign off this list, send a "signoff networker" command via email
to listserv AT listserv.temple DOT edu or visit the list's Web site at
http://listserv.temple.edu/archives/networker.html where you can
also view and post messages to the list. Questions regarding this list
should be sent to stan AT temple DOT edu
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