Found this in a post on the 'Net
Quote:
tape amount may return 1 of 2 pieces of data
1. last or current transfer: 0K ( This would show the amount transfered)
2. device identification string - %Stp0 - - - Vendor = Aiwa Product =
ts-200001 flowwed by a new line and "last or current transfer: 0K
Since it states last or current transfer, are you doing mulitple tar commands and only getting the info from the last (which is smaller than the whole)? Or, are you actually reading some number from the vendor model? Does your number change (the 26543k was written to tape) or stay the same?
If it's only reading the last transfer, or attempting to read from each transfer, then there is something missing in the logic. When running the tape command for each transfer, you would have to add that amount to a variable, increasing it each time a tar/dump/whatever is run.