Guardian User's Guide

Using Labeled Tapes

Guardian User’s Guide—425266-001

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Compressing a Tape Dump File

You can compress a tape dump file using the COPYDUMP utility, which usually resides

in the file $SYSTEM.SYSnn.COPYDUMP.

To use the COPYDUMP program to copy and compress a memory dump file from disk

or tape to disk, enter:

> COPYDUMP source-file , dest-file

source-file

specifies the memory dump file that is to be copied and compressed. Specify either

the name of the tape drive where the tape is loaded or the name of a disk dump file

you want to copy. If source-file is a tape file, you must create it by performing a

tape dump as described in the operator’s guide for your system. If source-file is a

disk file, you must create it by doing a bus dump as described in the operator’s

guide for your system or by using the RCVDUMP program or the RECEIVEDUMP

command.

dest-file

specifies the destination of the COPYDUMP operation. For dest-file, specify the

name of a disk file. If dest-file does not exist, it is created during the COPYDUMP

operation. If dest-file exists, it must be empty (EOF=0) and have file code 9614.

For a complete list and description of all COPYDUMP options, see the TACL Reference

Manual.

Examples

Copying and Compressing a Tape Dump File

If a tape dump file resides on the tape mounted on the tape drive $TAPE2, to copy and

compress the tape dump file into the disk file $DATA.DUMPS.CPU1, enter:

> COPYDUMP $TAPE2, $DATA.DUMPS.CPU1

Compressing a Disk Dump File

To compress the disk dump file $BAS10.DUMPS.CPU3 into the disk file

$BAS10.CDUMPS.CPU3, enter:

> COPYDUMP $BAS10.DUMPS.CPU3, $BAS10.CDUMPS.CPU3

Note. You can also use FUP (the CREATE and COPY commands) to copy tape dump files to

disk files. However, using COPYDUMP is faster, and it generates a smaller disk dump file

because it compresses the dump. Also, COPYDUMP automatically determines the size of the

disk dump file, whereas you must specify the extent size of the disk file if you use FUP.