Table of Contents

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Introduction

This section describes how to migrate your VAX system to CHARON-VAX. We will use a sample MicroVAX 3600 system to demonstrate the migration procedure. The process is similar for all CHARON-VAX models.

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Collecting information about the source VAX system

The first step is to determine the exact configuration of your VAX hardware in order to create the CHARON-VAX configuration file.

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To find out the exact types of controllers please refer to documentation on the source VAX system.

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Creation of CHARON-VAX configuration file

Using the above information, the following configuration can be created:

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DESQA is mapped to the "eth1" network interface. This interface will be used for CHARON-VAX (see the Installation section for more details) on this particular host.

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Making disk images

In our example, possible mappings of the RQDX3 and TQK50 tapes include physical devices and disk and tape images. Tape images have not to be manually created whereas you have to provision disk images, as described below.

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Installation of VAX operating system

The next step is to transfer the data from the source VAX system to CHARON-VAX. The easiest way to do it is via backups over the network. For this operation we need a bootable, network-enabled operating system on a CHARON-VAX disk image or physical disk.

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Making remote backups

Now we are ready to create disk backups from the source VAX system to CHARON-VAX.

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When the backup procedure will be completed, the disk "DUA3" of the CHARON-VAX virtual machine will contain 4 savesets: "DUA0.BCK", "DUA1.BCK", "DUB0.BCK" and "DUB1.BCK"

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Restore backups to CHARON-VAX disks

Next, restore the new savesets to their corresponding virtual disks. Login to CHARON-VAX and issue this sequence of commands to restore all the savesets created in the previous step:

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Then Enable the network and reboot.

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Alternative ways of data transfer

Some alternative methods of data transfer are also possible. For example:

• Connect a SCSI tape drive to the CHARON-VAX host via a PCI card 
  
  • Map the tape drive in the CHARON-VAX configuration file

         a. Restore the source VAX system backups from tape to disk images via VAX/VMS running on CHARON-VAX.
         b. Boot from standalone backups and restore the content to CHARON-VAX virtual disks.

  • Dump the source VAX system backups to tape images with the "mtd" utility and:
         a. Boot from the freshly installed VAX/VMS system and restore the tape images to CHARON-VAX virtual disks.
         b. Boot from standalone backups and restore the content to CHARON-VAX virtual disks.

• Create a network cluster between the source VAX system and CHARON-VAX (it is possible to use the source system as a boot server) then perform backups from one disk to another:

  $ BACKUP/IMAGE/IGNORE=INTER REAL$DUA0: DUA0:

  
  

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