Bob -

I recall reading something about a chip inside the 3592 cartridge that, among 
other things, contains a tape 'VTOC' which is presumably used to perform a high 
speed search to locate multiple files on the cartridge. We have a small pool of 
several hundred 3592s in our ATLs that we use natively for specialized apps 
like SMF data but they are not generally used by the applications community. 
These all contain single files so I couldn't answer directly to your question.

The remainder of the 3592s in the libraries back our IBM VTSs.

Frank Bonaduce
GSG/Systems Engineering 

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of 
Bob Shannon
Sent: Wednesday, August 31, 2011 4:39 PM
To: [email protected]
Subject: Replace 3590 With 3592

We are considering replacing the 4 3590 drives in our ATL with 4 3592 drives. 
Given the increased tape capacity, we are concerned with the seek time of the 
3592s, i.e., will they noticeably delay recalls?  I'd appreciate comments from 
those with experience in this area. TIA.

Bob Shannon
Rocket Software

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