Compaq AlphaServer ES40, Owner'S Manual

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3-26 ES40 Owner’s Guide
3.8.1 Switching Between UNIX and OpenVMS
Follow this procedure if you have already installed an operating
system and want to switch to another supported operating system.
CAUTION: Before switching operating systems, make a note of the boot path
and location of the system disk (controller, SCSI ID number, and so
on) of the operating system you are removing so that you can restore
that operating system at a later date.
1.
View and save the boot parameters for the operating system you are
removing.
2.
Shut down the operating system and power off the system. Unplug the
power cord from each power supply.
3.
Remove the enclosure panels and system covers as described in Chapter 8.
4.
Remove any options that are not supported on the operating system you are
installing and replace them with supported options.
5.
Remove the system disk and data disks and insert the system and data
disks for the operating system you are installing.
6.
Plug in the power supplies and power up the system.
7.
Set boot parameters and boot the operating system.
8.
Set the system date and time.