[University of Arkansas][Computing Services]

Disaster Recovery Plan
DDR Quick Reference
(DRPMS050)

Last update: Tuesday, 21-Mar-2000 10:34:16 CST

IBM's DASD Dump/Restore (DDR) is a VM utility used to perform DASD dump/restore operations. It can be run as a standalone program or under CMS.

Locating the DDR Program

An IPLable version of the Standalone DDR program is present as part of File 1 on Tape Volume 1 of the VM/ESA Starter System. The first physical file of Tape Volume 1 contains an IPLable image of the ICKDSF program, immediately followed by an IPLable version of the DDR program. Though this may not be the most current release of DDR, you should use it for this process.


Running Standalone DDR

To run the Standalone DDR program, mount the VM/ESA Starter System Tape Volume 1 on an available tape drive and IPL the system twice from that device. The first IPL starts the Standalone ICKDSF program; the second IPL starts the Standalone DDR program.

Standalone DDR interprets the first interrupt it receives as the console device. Therefore, you must disconnect or disable any device other than the console that can generate an interrupt before IPLing DDR.

The procedure for starting DDR is as follows:

  1. Before running DDR on a disk device, be sure to follow the proper initialization procedure using ICKDSF (see DRPMS050: ICKDSF Quick Reference). Ensure that the disks to be restored have been formatted in ESA mode.
  2. IPL the tape twice. Wait 60 seconds between the two IPLs. You will see no messages as a result of either IPL. DDR goes into a wait state when the IPL process is complete.

  3. Press the Request or Enter key from the console. The following message is displayed:
    VM/ENTERPRISE SYSTEMS ARCHITECTURE DASD DUMP/RESTORE PROGRAM
    ENTER CARD READER ADDRESS OR CONTROL STATEMENTS
    ENTER:
    
You are now ready to enter DDR commands from the console.


Restoring a Disk Volume

The process for restoring a disk volume from a DDR DUMP tape is described here. The procedure specific for restoring the VM/ESA Starter System varies slightly from this procedure. Please see the VM/ESA Installation Guide (see reference below) for complete instructions on restoring the VM/ESA Starter System.

For general DASD restores, use the following DDR commands:

sysprint cons
ENTER:

input tapeaddr tape
ENTER:

output diskaddr dasd volumeserial
ENTER:

restore all

HCPDDR717D DATA DUMPED FROM volumeserial TO BE RESTORED TO volumeserial 
DO YOU WISH TO CONTINUE?  RESPOND YES, OR OR REREAD:

yes

RESTORING volumeserial

DATA DUMPED   mm/dd/uu AT hh.mm.ss  GMT FROM volumeserial RESTORED TO volumeserial
INPUT CYLINDER EXTENTS      OUTPUT CYLINDER EXTENTS
      START       STOP         START        STOP

If the original DDR DUMP used multiple tapes, DDR will call for successive tapes with the following messages:

END OF VOLUME CYL nnnnnnnn HD nn, MOUNT NEXT TAPE
hh:mm:ss HCPERP2233I TAPE  tapeaddress NOT READY, CP-OPERATOR NOTIFIED

When the DDR RESTORE is completed, the tape is rewound and the following message is displayed:

   00000000   00001769      00000000    00001769
END OF RESTORE
 BYTES RESTORED nnnnnnnnnn


Documentation

Documentation for the DDR program is available in the IBM manual CP Command and Utility Reference (SC24-5773). This manual is available on CD-ROM in the Disaster Recovery Lock Box (IBM Online Library: VM Collection).

Additional details on the use of DDR for restoring the VM/ESA Starter System are in the VM/ESA Installation Guide (SC24-5748) in section PART 2 (VM/ESA System DDR Installation). This manual is also on the same VM Collection CD-ROM.



[Home Page] [Table of Contents] [Send Mail]
Copyright © 1997 University of Arkansas
All rights reserved