The Virtualization Cookbook for SLES 10 SP2 - z/VM - IBM

You should see that the VSWITCH VSW1 exists, that the OSA devices you specified are
being used and that there are two built-in VSWITCH controllers, DTCVSW1 and DTCVSW2.
4. Use the QUERY RETRIEVE and QUERY VDISK commands to see the changes made to the
Features statement in the SYSTEM CONFIG file:
==> q retrieve
99 buffers available. Maximum of 255 buffers may be selected.
==> q vdisk userlim
VDISK USER LIMIT IS INFINITE
==> q vdisk syslim
VDISK SYSTEM LIMIT IS INFINITE, 0 BLK IN USE
This shows that the changes to the SYSTEM CONFIG file have taken effect.
4.6 Adding paging volumes
The z/VM operating system resides on the first three CP volumes (or one volume if installing
onto 3390-9s). z/VM 6.1 is installed with one full paging volume and one full spool volume. A
single spool volume is probably adequate for Linux needs, however, a single paging volume
is probably not.
It is recommended that you add at least three paging volumes so you will have a total of four
(or one more 3390-9). Having adequate paging space will give you plenty of headroom to add
more Linux virtual machines. A rule of thumb for the amount of paging space is to have twice
as much as the total of all memory for all running Linux user IDs combined.
4.6.1 Formatting the paging volumes
Before adding paging volumes to the system, the DASD volumes to be used for minidisk
space (PERM) and paging space (PAGE) must be formatted. Normally this is done one volume at
a time using the CPFMTXA command. If you have just a few volumes, that is fine, but when you
have many volumes to format, the process of running CPFMTXA can become time consuming
and tedious which can lead to errors.
Therefore, a REXX EXEC named CPFORMAT has been provided to allow you to format many
volumes with a single command. The source code for this EXEC is in the section B.2.1, “The
CPFORMAT EXEC” on page 244. It is a wrapper around CPFMTXA. To use this EXEC, each
DASD to be formatted must first be attached with the virtual device address the same real
device address (using ATTACH realDev *).
Note: This EXEC will label the volumes according to the convention described in 2.2.1,
“Volume labeling convention” on page 9. If you want different volume labels, you can use the
CPFMTXA command and manually specify each volume label, or you can modify the REXX
EXEC.
Getting the CPFORMAT EXEC to z/VM
Perform the following steps:
► Logoff of MAINT so you will be able to get the MAINT 191 disk in read-write mode using
FTP.
Important: At this point, you will need access to the NFS server described in chapter 6, in
order to get the files CPFORMAT EXEC. If you did not complete that chapter, it is required in
order to proceed.
50 The Virtualization Cookbook for RHEL 6