Joel / Doug,

TSM allows you to do that without error.  But your old data is accessible
only if the media types match.  I just updated a DLT device class to point
to a 3575 Magstar library and the command succeeded.  But one wonders how
TSM would read the existing DLTs in the 3575.

The original post didn't mention media, but we use that very technique
with our offsite tape libraries.  I have a two-drive DLT library that is
an installed spare for the main four-drive DLT library.  Our copypool is
defined on the four-drive library.  To use the two-drive as the host for
the copypool, I just do the UPDATE  DEVCLASS command and point the device
class definition to the two-drive library.  Everything works as though
nothing happened at the storage pool level.

Because the media match on both libraries, tapes written in one can be
checked out and checked back into the other.  Works AOK.  We've tested it.

All of this is why I don't build any "intelligence" into device class
names.  Ours are "DEV01", "DEV02", etc.  I don't include any model
numbers, media types, etc.

Hope this helps.

Tab Trepagnier
TSM Administrator
Laitram, L.L.C.







Doug Thorneycroft <dthorneycroft AT LACSD DOT ORG>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
01/06/2004 09:44 AM
Please respond to dthorneycroft


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        Re: moving a primary sequential access storage pool to 
another library


You can use the update the device class to use the new library.
Update devclass <olddev> devtype=<type> format=<drive> library=<newlib>
mountlimit=<#>

Doug Thorneycroft
County Sanitation Districts of Los Angeles County
(562) 699-7411 Ext. 1058
FAX (562) 699-6756
dthorneycroft AT lacsd DOT org



-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
Joel Fuhrman
Sent: Monday, January 05, 2004 4:09 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: moving a primary sequential access storage pool to another
library


Is it possible to move a primary sequential access storage pool from one
library to another library with out having to copy the data?  If so, how?

I need to move my primary sequential access storage pools from one library
to another.  If I could update the device class name for the storage pool
my
problem would be resolved but the device_class_name is not an UPDATE
STGPOOL
option.

Is it possible to delete the sequential access storage pool
device_class_name and then re-define the same device_class_name while
specifying the other library without corrupting the database?