Another huge contributor to this phenomenon is failure to use DIRMC on disk
(and FILE on disk for sequential migration/reclamation) storage pools.

A lot of servers and a lot of objects (more common with Windows these days)
need all the help they can get;  keeping directories on disk (using DIRMC
trick) makes a huge difference in the number of tape seeks required... see
other posts about restore times.  I had a customer with non-collocated DLT
backups for 30 servers, spread over 45 tapes;  it only took about 30 hours
to restore 316 GB, 1.6 million objects -- that's over 10 GB/Hr, faster than
most benchmarks!

Don France
Technical Architect - Tivoli Certified Consultant

Professional Association of Contract Employees (P.A.C.E.)
San Jose, CA
(408) 257-3037
don_france AT att DOT net