dump tape capacities/back up strategies

[wills ms 01309]

In the past, we have managed to squeeze a little extra info on to each
dump tape by specifying a combination of length/density options on the
dump command line.  This is apparently due to the fact that 620 ft
tapes are a bit longer than 620 ft.  Has anyone else experimented with
this, and if so, what is the largest "reasonable" number?  Please, email
responses to the address below.
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M. Scott Wills                           Harris Corporation
INTERNET: mwills at x102a.ess.harris.com    Government Aerospace Systems Division
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CCMail:   harris.mwills1                 Melbourne, Florida 32902
FAX:	  407-729-3211o
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