My thinking is ALWAYS have a second copy.  Have had a rash of bad tapes over 
the past year.  Thanks to the offsite storage pool, I have only lost two files 
in six years of using adsm/tsm for approximately 100 clients.  One of those 
lost files occurred before I had the resources to have an offsite copy.  The 
other was just plain bad luck.  Both onsite and offsite copies were on 3590 
volumes in the bad batch.
I have my onsite pool colocated by filespace, but the offsite pool is of 
course, not colocated.  I do reclamations every day, and the offsite pool uses 
about two thirds the cartridges of the onsite.  Worth every blasted cartridge 
to me.


Gary Lee
Senior Operating Systems Analyst
Ball State University
phone 765-285-1310
 

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