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

One default setting that can be dangerous, especially if you use F12 to retrieve commands, is
that PF12 is set to the FILE subcommand. Sometimes you may not want to save your
changes with the stroke of one key. It is recommended that you set PF12 to the ?
subcommand which has the effect of a retrieve key:
==> copy profile xedit a profile xediorig a (oldd
==> x profile xedit a
Before:
After:
SET PF12 FILE
SET PF12 ?
Save your changes with the FILE subcommand.
4.4 Customizing the SYSTEM CONFIG file
The first configuration file read when z/VM IPLs is the SYSTEM CONFIG file. The following
changes are recommended:
► Change the system name
► Increase retrieve key capacity
► Allow virtual disks (VDISKs) to be created
► Turn off the Disconnect Timeout (this will prevent idle disconnected users from being
forced off the system)
► Define a virtual switch (VSWITCH) that will be used for Linux networking
To make these changes, perform the following steps:
► To edit the SYSTEM CONFIG file, the MAINT CF1 minidisk must be released as a CP disk
using the CPRELASE command. The CP disks are queried using the QUERY CPDISK command.
Note the MAINT CF1 disk is accessed as CP disk A before it is released but not after.
==> q cpdisk
Label Userid Vdev Mode Stat Vol-ID Rdev Type StartLoc EndLoc
MNTCF1 MAINT 0CF1 A R/O 610RES 6280 CKD 39 158
MNTCF2 MAINT 0CF2 B R/O 610RES 6280 CKD 159 278
MNTCF3 MAINT 0CF3 C R/O 610RES 6280 CKD 279 398
==> cprel a
CPRELEASE request for disk A scheduled.
HCPZAC6730I CPRELEASE request for disk A completed.
==> q cpdisk
Label Userid Vdev Mode Stat Vol-ID Rdev Type StartLoc EndLoc
MNTCF2 MAINT 0CF2 B R/O 610RES 6280 CKD 159 278
MNTCF3 MAINT 0CF3 C R/O 610RES 6280 CKD 279 398
► Once it is released you are able to access the MAINT CF1 disk read-write. Use the LINK
command with multi-read (MR) parameter and ACCESS command to get read-write access
as your F disk.
==> link * cf1 cf1 mr
==> acc cf1 f
► Make a backup copy of the vanilla SYSTEM CONFIG file using the COPYFILE command with
the OLDDATE parameter so the timestamp of the file is not modified. Note that because the
target file name (system) and mode (f) are the same, the equal sign (=) can be used as a
wildcard.
44 The Virtualization Cookbook for RHEL 6