UNIX for Advanced & Expert Users

version: SCO 5.0.5

There is a file in /usr/local/bin called ' baktape ', I'm unsure whether this is a standard unix file or one created by someone who used to manage this server? Anyway, it backs up what is specified to be backed up to tape and then prints off a report.

Problem:
What comes out on the report for the ' data written to tape ' is incorrect. For example, my report will show that 26543k was written to tape and when I extract the actual data from the tape, it is more like 3Gb. (data compression is off)

Script:
Partial script that produces the report is as follows,

AMOUNT=`tape amount | awk -F: '{print $2}'`
echo "Tape space used : ${AMOUNT}">>${TAPELOG}

Knowing that the command to see the data written in the current or last transfer is " tape amount ", what could be the cause of this problem.

I have already used new tapes, cleaned the tape drive. Oh the tape drive is a SONY SDT9000.

Found this in a post on the 'Net
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.

Thanks for the reply RTM. I think I may of sorted it out.

In the cpio command I use the -C option to state my Buffer Size, this was set to 10000, my thoughts are that if I increase this then I will be able to read in bigger blocks. Your idea is right where I can write to a variable, I will try the bigger buffer size first, if that fails, I will use your variable to hold the value.

Thanks