System information

Sharing and maintaining SLES 10 SP2 Linux under z/VM 21
Figure 1-11 Disk planning with four 3390-9s and one 3390-3
Defining virtual machines
A user ID CMSCLONE is defined with the following directory definition. It is given two minidisks:
191 A small 30 cylinder minidisk for storing the cloning EXECs.
192 A 100 cylinder common disk that will become the Linux user IDs’ read-only 191
disk. It will store kernels, RAM disks, parameter files, the SWAPGEN EXEC, install
EXECs, etc. The ALL keyword is used for the read password in the MDISK statement
so that any user ID can link to the disk without a password.
Note the following:
򐂰 The option LNKNOPAS is included so that the user ID can link to all minidisks without the
need for a password.
򐂰 Class B permission is needed so the FLASHCOPY command can be invoked.
Authorization is needed to run the FLASHCOPY command, which is part of CP privilege class B.
It is possible to allow the FLASHCOPY command to be executed without class B permission by
creating a locally-defined privilege class that gives that authority and nothing else. Details are
outside the scope of this paper.
Following is the directory definition for the CMSCLONE user ID:
USER CMSCLONE PASSWD 64M 1G BG
INCLUDE IBMDFLT
OPTION APPLMON LNKNOPAS
IPL CMS
MACHINE ESA 4
MDISK 0191 3390 0001 0030 DM6364 MR PASSWD PASSWD PASSWD
MDISK 0192 3390 0031 0100 DM6364 MR ALL PASSWD PASSWD
Note: Don’t forget to modify the volume label (DM6364 in this example) to the value
appropriate for your environment.
A new user directory profile RORDFLT is created that will be common to all read-write Linux
virtual machines. It has the NICDEF statement which creates a virtual OSA connection to the
system VSWITCH named VSW1. Think of this statement as creating a virtual Network Interface
Card (NIC) that is created and plugged in to the system VSWITCH when the user ID is logged
on.
S10RWMNT
S10RWTST
DM63C9
3390-9
LNX227
DM63CD
3390-9
LNX226
S10ROGLD
DM63CB
3390-9
xxxGOLD
11Bx, 21Bx
DM63CA
3390-9
CMSCLONE
LNXCLONE
DM6364
3390-3
S10GOLD
11Bx, 21Bx
DM63CA
3390-9