Steps For Controlling Access To Devices At Startup - IBM ZVM - FOR LINUX V6 RELEASE 1 Getting Started

6.
7.
8.
You should now see something like this:

Steps for controlling access to devices at startup

Sometimes your z/VM system may have access to devices that you do not want to
be varied online during IPL. For instance, the devices may duplicate labels of
devices used by your production system, or may be in use by other LPARs or
systems. You can specify ranges of devices that z/VM should not vary online
during IPL.
Before you begin: You need to end CP's access to the primary parm disk. See
"Steps for releasing the primary parm disk" on page 37.
Perform these steps to control access to devices at startup:
1.
2.
b. Move the cursor to the line containing the text "Logon no". After the word
"no" place a space and a comma.
Move the cursor to the prefix area on the line "Vdisk Userlim 144000 blocks ,",
type "i4" followed by a space, then press the Enter key.
Type these features (indent as shown) on the new lines:
Disconnect_timeout off
Set ,
ShutdownTime 30 ,
Signal ShutdownTime 500
Save the file. At the XEDIT command line, type this command and press the
Enter key:
====> save
SYSTEM CONFIG Z1 F 80 Trunc=80 Size=258 Line=148 Col=1 Alt=4
Features ,
Disable ,
Set_Privclass ,
Enable ,
Auto_Warm_IPL ,
Clear_TDisk ,
Retrieve ,
Default 20 ,
Maximum 255 ,
MaxUsers noLimit ,
Passwords_on_Cmds ,
Autolog no ,
Link no ,
Logon no ,
Vdisk Userlim 144000 blocks ,
Disconnect_timeout off
Set,
ShutdownTime 30 ,
Signal ShutdownTime 500
Edit the SYSTEM CONFIG Z file. Type this command and press the Enter key:
xedit system config z
Find the section titled "Status of Devices." At the XEDIT command line, type
this command and press the Enter key:
/* Disable the following features */
/* Disallow SET PRIVCLASS command */
/* Bypass prompting at IPL
/* Clear TDisks when detached
/* Retrieve options
/* Default.... default is 20
/* Maximum.... default is 255
/* No limit on number of users
/* What commands allow passwords? */
/* ... AUTOLOG does not
/* ... LINK does not
/* ... and LOGON does not, too
/* Maximum vdisk allowed per user */
Chapter 3. Changing the system configuration
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