SUMMARY: Shared tape drive on ASE 1.5

From: Frederick, Bill <Isdwcf_at_cgcu.com>
Date: Mon, 13 Sep 1999 10:50:50 -0500

I received only one response from Alan at Compaq. He gave me some places to
look, but I'm still not sure why Networker will not see my changer. Here is
his response:

The manual page for the file(1) command should document
what the error counters are. One value is "hard" errors
and the other "soft" errors. The distinction is entirely
up to the driver counting the errors. You should be able
to look at the error to see what some of the errors were.

As for the media changer being reserved, I doubt that ASE
knows what a media changer is, much less whether it should
be reserved. I'm also not sure it needs to be reserved.
The risk of another system moving media around behind the
back of the media management software isn't much greater
than for a another process on the same system doing the
same thing.


-----Original Message-----
From: Frederick, Bill [mailto:Isdwcf_at_cgcu.com]
Sent: Thursday, September 09, 1999 11:59 AM
To: Tru64 Unix Managers (E-mail)
Subject: Shared tape drive on ASE 1.5


Fellow Managers:

I apologize in advance for the length of this two part question:

Part 1: I am sharing a TL891 between two 4100's running 4.0d pk #3. The
4100's are running firmware 5.4. Until recently, I had no problems.
However, last week I ran into to some problems attempting to install
Networker 5.5.1 (I've had both 4.4 and 5.5 running with no problems). I was
unable to see the changer from the nwadmin GUI. As I was troubleshooting
the hardware I ran into the following error message:

# file /dev/nrmt0*
/dev/nrmt0a: character special (9/36871) SCSI #2 TZ89 tape #3 (SCSI
ID #4) (SCSI LUN #0) errors = 0/46 85700_bpi
/dev/nrmt0h: character special (9/36867) SCSI #2 TZ89 tape #3 (SCSI
ID #4) (SCSI LUN #0) errors = 0/46 85700_bpi
/dev/nrmt0l: character special (9/36865) SCSI #2 TZ89 tape #3 (SCSI
ID #4) (SCSI LUN #0) errors = 0/46 85700_bpi
/dev/nrmt0m: character special (9/36869) SCSI #2 TZ89 tape #3 (SCSI
ID #4) (SCSI LUN #0) errors = 0/46 85700_bpi

Any ideas what "errors = 0/46" is referring to?

Part 2: When I setup a tape service and specify a changer (/dev/mc16 in my
case), shouldn't this device be reserved for the machine where the service
is located? I thought so, but when run the file command on Node A and Node
B here is my output (the service is running on Node B):

Node A:
# file /dev/mc16
/dev/mc16: character special (53/32768) SCSI #2 TL800 special_device
#128 (SCSI ID #0) (SCSI LUN #0

Node B:
# file /dev/mc16
/dev/mc16: character special (53/32768) SCSI #2 TL800 special_device
#128 (SCSI ID #0) (SCSI LUN #0)

Any pointers would be appreciated.

Thanks in advance,

Bill Frederick
Citizens Gas
Indianapolis, IN
Received on Mon Sep 13 1999 - 15:53:25 NZST

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