I've seen this before for dds drives, but the same characteristics of this
problem probably apply to the 7980S as well.
Probably during your most recent reboot, there was a (possibly temporary)
malfunction with your tape drive's power supply such that its existence was
not recognized during the bootup process.
Since that would normally result in a "device unavailable" condition and
subsequent disabling of that logical device number, I have noticed
instances whereby that ldev no. is actually made available to the logon
device number pool (for subsequent assignment for logon session device
numbers).
Long story short, the solution appears to be a power cycle start norecovery
reboot.
After shutting down and powering off cpu and all devices, ensure to execute
ODE to ensure all devices are recognized before START NORECOVERY.
Failure to recognize the device at that point should lead to further
investigation of power supply, scsi device no. setting, or other hardware
malfunction.
If this situation happens frequently, I would first suspect a problem with
the power supply of that device.
At 03:49 PM 2003-10-02, Eben Yong wrote:
>We have a 7980S magreel tape device that is not responding--that is, we
>put the reel tape in, but it is not coming online. Sysgen gives this:
>
> io> ldev 15
> LDEV: 15 DEVNAME: OUTDEV: 0 MODE:
>R
> ID: HP7980S RSIZE: 128 DEVTYPE:
>TAPE
> PATH: 0/28/0.2.0 MPETYPE: 24 MPESUBTYPE:
>5
>CLASS:
>TAPE
>
>I'm not sure if this is helpful, but I also show that a user is logged
>into the system using ldev 15:
>
>JOB# STATE DEV INTRODUCED Q PROGRAM LOGON
>
>#S1619 EXEC 15 12:35P QUICK SANDY,USER.AIH,PUB
>
>
>One last thing. SHOWDEV TAPE does not list the device:
>
>showdev tape
> LDEV AVAIL OWNERSHIP VOLID DEN ASSOCIATION
>
> 51 AVAIL
> 14 AVAIL
> 7 AVAIL
> 8 AVAIL
> 9 AVAIL
> 52 AVAIL
>
>
>Any suggestions as to what we can do to uncover the problem of the
>disappearing tape drive?
>
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>* etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
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Gilles Schipper
GSA Inc.
HP System Administration Specialists
300 John Street, Box 87651 Thornhill, ON Canada L3T 7R4
Voice: 905.889.3000 Fax: 905.889.3001
email: [log in to unmask] web: http://www.gsainc.com
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