Installation manual

Before Upgrading the OpenVMS VAX Operating System
5.5 Preparing the System Disk
5.5.6 Check Page and Swap Files
Compaq recommends that the page file be located on the system disk in
SYS$SPECIFIC:[SYSEXE] for the upgrade.
The swap file (SWAPFILE.SYS) does not need to be located on the system disk
for the upgrade, but if it is located on the system disk, the file must be located in
SYS$SPECIFIC:[SYSEXE].
If the upgrade procedure finds the page files and swap files in the common
directory, it moves them to the system-specific directory before continuing.
The page file must be at least 4600 blocks. If the upgrade procedure detects fewer
than 4600 blocks, it displays a message that gives you the option of continuing
the upgrade or exiting the procedure and increasing the size of the page file. If
you get this message, Compaq recommends that you exit the procedure, increase
the page file to at least 4600 blocks, and restart the upgrade procedure.
To check the size of your page file and enter a new size if needed, use the
following procedure:
1. To determine the size of the page file, enter the following command:
$ @SYS$UPDATE:SWAPFILES
The procedure displays the size of the page file and asks you to enter a new
value, as follows:
Enter new size for paging file:
If the page file (PAGEFILE.SYS) size is greater than 4600 blocks, press
Return. If it is less than 4600 blocks, enter 4600 and press Return.
2. If the swap and dump files are on the system disk, the procedure displays the
sizes of each file. To keep the current values, press Return after each prompt.
If the swap file is not on the system disk, the procedure asks if you want to
create one. You do not need swap and dump files on the system disk for the
upgrade procedure. Enter the appropriate response for your system.
If you changed the size of the page file or created a swap file, a message is
displayed that tells you to reboot the system. Do not reboot now. You will
reboot later.
5.5.7 Check for Free Blocks
Check the system disk to make sure there is enough room for the upgrade. To
determine whether you have enough room, enter the following command:
$ SHOW DEVICE SYS$SYSDEVICE
To upgrade the OpenVMS VAX required files, the minimum number of free blocks
required is 48,950. Even if you plan to upgrade the OpenVMS library or optional
files, you might not need more than 48,950 free blocks because many files are
deleted as the upgrade progresses, thus freeing up additional space.
Before Upgrading the OpenVMS VAX Operating System 5–9