ADSM-L

Re: [ADSM-L] Library manager/library conundrum

2008-10-02 13:23:06
Subject: Re: [ADSM-L] Library manager/library conundrum
From: Fred Johanson <Fred AT UCHICAGO DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 2 Oct 2008 12:22:06 -0500
If you're SAN connected, Q SAN on the client supplies the device name for each 
path.

Fred Johanson
TSM Administrator
University of Chicago

773-702-8464

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Remco Post
Sent: Thursday, October 02, 2008 12:04 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Library manager/library conundrum

On Oct 2, 2008, at 18:33 , Mark Stapleton wrote:

> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
> Of Paul Zarnowski
>> Double check your element numbers and paths to the drives.  Make sure
> you
>> have a path defined for each drive to each library-client server.
>
> There are no drive definitions for the "remote" library in the library
> client, and therefore no element numbers or paths to check. There is a
> path in the library manager that connects each of the tape drives to
> the
> library client, and as I mentioned there is obviously some
> communication
> going on.

> Here's another question that has been asked...
>
> When a library client sends migrated data from disk to a tape drive
> managed by a library manager, does the data flow on fiber from the
> client to the tape drive directly, or does it flow across the LAN from
> the client to the manager, and then on fiber from the manager to the
> tape drive?
>

This may be a clue, the drive is accessed directly by the library
client. All the library server does is verify the label. After that,
the device is opened by the client. This is the reason the paths
(defined on the library server) must be correct for the library
client. So if a drive called drive4 is \\.\tape4 on the server and \\.
\tape1 on the client, there must be a path, defined on the server,
from your client to drive4 via device \\.\tape1

> --
> Mark Stapleton (mark.stapleton AT cdw DOT com)
> CDW Berbee
> System engineer
> 7145 Boone Avenue North, Suite 140
> Brooklyn Park MN 55428-1511
> 763-592-5963
> www.berbee.com
>

--
Met vriendelijke groeten,

Remco Post
remco AT pipsworld DOT nl