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Tivoli Tape Zero percent

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Old 10-20-2010
Java Tivoli Tape Zero percent
Hii all,

If i insert zero percent tape in tivoli. Then tivoli will write data on it.

But zero percent tape has some files inside, its not a scratch tape.

Because if we recover data then tivoli can ask for zero percent tape.

But when tivoli will write data on a zero percent tape what will happen with the old data in zero percent tape. Is tivoli overwrite zero percent tape data completely or that data will be there and tivoli will use remainig area of the tape?

I'm confuse on it pls help me out.

takecare.
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LEARN ABOUT FREEBSD

tcopy

TCOPY(1)						    BSD General Commands Manual 						  TCOPY(1)

NAME

     tcopy -- copy and/or verify mag tapes

SYNOPSIS

     tcopy [-cvx] [-s maxblk] [src [dest]]

DESCRIPTION

     The tcopy utility is designed to copy magnetic tapes.  The only assumption made about the tape layout is that there are two sequential EOF
     marks at the end.	By default, the tcopy utility will print information about the sizes of records and files found on the /dev/sa0 tape, or
     on the tape specified by the src argument.  If a destination tape is also specified by the dest argument, a copy of the source tape will be
     made.  The blocking on the destination tape will be identical to that used on the source tape.  Copying a tape will yield the same program
     output as if just printing the sizes.

     The following options are available:

     -c 	Copy src to dest and then verify that the two tapes are identical.

     -s maxblk	Specify a maximum block size, maxblk.

     -v 	Given the two tapes src and dest, verify that they are identical.

     -x 	Output all informational messages to the standard error instead of the standard output.  This option is useful when dest is given
		as /dev/stdout.

SEE ALSO

     mt(1), mtio(4)

HISTORY

     The tcopy command appeared in 4.3BSD.

BUGS

     Writing an image of a tape to a file does not preserve much more than the raw data.  Block size(s) and tape EOF marks are lost which would
     otherwise be preserved in a tape-to-tape copy.

     End of data (EOD) is determined by two sequential EOF marks with no data between them.  There used to be old systems which typically wrote
     three EOF's between tape files.  The tcopy utility will erroneously stop copying early in this case.

     When using the copy/verify option -c, tcopy does not rewind the tapes prior to start.  A rewind is performed after writing, prior to the ver-
     ification stage.  If one does not start at the beginning-of-tape (BOT) then the comparison may not be of the intended data.

BSD
								 December 20, 2006							       BSD