It's exactly like that.  You need to keep the metadata on disk.

In the TDP for SQL 6.4 book, search for the topic Metadata Considerations.

This may also help:
http://www-01.ibm.com/support/docview.wss?uid=swg27035973
 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Saravanan
Sent: Friday, April 18, 2014 10:09 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] TDP for SQL

While querying backups(active, inactive) during restore in version TDP SQL 6.4, 
its taking much time, some time more than 5 hours. Is there any parameters can 
set in .cfg or .opt file to get faster response? Like TOC in NAS
 

By Sarav
+65-82284384