Because you cannot
upgrade the operating system on a shadowed system disk (the upgrade
will fail), you need to disable shadowing of the system disk and
perform other operations before you can upgrade the operating system.
There are several methods for creating a nonshadowed target
disk. This chapter describes how to change one of your existing shadowed
system disks in a multiple-member shadow set to a nonshadowed disk
that you can use as your target disk for the upgrade.
If you have a larger configuration with disks that you can
access physically, you might want to use a copy of the system disk
as your target disk. HP Volume Shadowing for OpenVMS describes
two methods you can use to create this copy (using volume shadowing
commands or BACKUP commands) and how to disable volume shadowing.
Setting the Boot
Be sure your system is set to boot by default from the disk
you intend to upgrade. For OpenVMS Alpha systems, use the SHOW
BOOTDEF_DEV and SET BOOTDEF_DEV console commands to accomplish this task.
(For more information, see Appendix A “Booting and Shutting Down Your OpenVMS Alpha
For OpenVMS I64 systems, HP recommends using the OpenVMS I64
Boot Manager utility (SYS$MANAGER:BOOT_OPTIONS.COM) to add shadowed
system disks in a multiple-member shadow set to the EFI boot device
list and dump device list. Be sure to add all members to both lists.
For more information about setting boot options and using this
utility, see “Setting
Boot Options for Your System Disk”.
Creating a Nonshadowed
Perform the steps described in this section to change one
of your existing shadowed system disks to a nonshadowed disk.
|IMPORTANT: If you simply use a MOUNT/OVERRIDE=SHADOW_MEMBERSHIP
command to mount the volume to be upgraded, volume shadowing can
overwrite the newly upgraded disk with information from a prior
volume that has not been upgraded.|
Shut down all systems booted from the shadowed
Perform a conversational (interactive) boot (for OpenVMS
Alpha systems, see ; for OpenVMS I64 systems, see “Performing
a Conversational (Interactive) Boot”) on the system disk you have
chosen for your target disk. For OpenVMS Alpha systems, for example,
enter the following command:
>>> BOOT -FLAGS 0,1 DKA100
For OpenVMS I64 systems, enter the following command at the
EFI Shell prompt, where fsn: is the device
associated with the system disk (such as fs1:):
Shell>fsn:\efi\vms\vms_loader.efi -flags 0,1
At the SYSBOOT> prompt, enter the following
command to disable volume shadowing of the system disk:
SYSBOOT> SET SHADOW_SYS_DISK 0
Enter the CONTINUE command to resume the boot procedure.
After the boot completes, go to “Finishing Preupgrade Tasks”.
You now have a nonshadowed system disk that you can use for