Load parameter descriptions

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Load during activation
Selecting this option allows initial program load of the operating system to occur automatically at LP activation. The default is not selected.
Device Type
You can select the following Device type:
  • ECKD
  • SCSI
  • NVMe
  • Tape
Note: Depending on the combination of Device type, IPL type, and Load type selected some of the following parameters may not be available.
IPL Type
You can select the following IPL type depending on the Device type selected:
  • Channel Command Word (CCW)
  • List-directed
Note: Depending on the combination of Device type, IPL type, and Load type selected some of the following parameters may not be available. Secure Boot for Linux and Validated Boot for z/OS are only performed for List-Directed IPL.
Load type:
You can select the following type of load to perform for the logical partition.
Load an OS
Performs an operating system load type on the logical partition.
Load a dump program
Performs a dump program load type on the logical partition.
Note: Depending on the combination of Device type, IPL type, and Load type selected, some of the following parameters may not be available.
Validation
Enable Secure Boot
Select Enable Secure Boot to verify the signature of the load program and distributor’s signature match using the certificate(s) assigned to the partition.
Options:
Store status
The store status function stores the current values of the processing unit timer, the clock comparator, the program status word, and the contents of the processor registers in their assigned absolute storage locations.

If the Load a dump program type is selected, click the check box to change the setting.

  • A check mark indicates performing the store status function before the load.
  • An empty check box indicates not performing the store status function before the load.
Clear the main memory before loading
Select this to clear main memory storage on the logical partition before a load. Clearing partitions with larger amount of main memory storage may take longer.
Load address
Enter the hex address of the I/O device containing the operating system to be loaded automatically at LP activation.
Use dynamically changed address
Select this option if you want to use the load address from a dynamically changed I/O configuration.
Load parameter
Enter a 1 to 8 character, optional IPL load parameter for loading an operating system on each activation of the LP. This is useful for loading z/OS®, or 21CS VSEn®. Valid characters for a load parameter are:
  • At (@)
  • Pound (#)
  • Dollar ($)
  • Blank character
  • Period (.)
  • Decimal digits 0 through 9
  • Capital letters A through Z .
Use dynamically changed parameter
Select this option if you want to use the load parameter from a dynamically changed I/O configuration.
Time-out value
Enter a time-out value in seconds to limit the amount of time for successful completion of the operating system load.
Worldwide port name
Specify the Worldwide Port Number identifying the Fibre Channel port of the SCSI target device (according to the FCP/SCSI-3 specifications). This is a 64-bit binary number designating the port name, represented by 16 hexadecimal digits. This is required for SCSI IPL or SCSI Dump.
Logical unit number
Specify the number of the logical unit as defined by FCP (according to the FCP/SCSI-3 specifications). This is the 64-bit binary number designating the unit number of the FCP I/O device, represented by 16 hexadecimal digits. This field is required for SCSI IPL or SCSI Dump.
Boot record location
Specify the boot record location (C,H,R format) parameters from the volume label or be specified.
Boot program selector
Specify the DASD partition number in decimal notation or select Automatic.
Boot record logical block address
Specify the load block address. This is a 64-bit binary number, represented by 16 hexadecimal characters, designating the logical block address of a boot record on the FCP-load device. If no block address is specified, the logical-block address of the boot record is assumed to be zero. This feature could be used to IPL using a second or backup boot record, in case the original one is corrupted or overwritten by accident.
Operating system specific load parameters
Specify a variable number of characters to be used by the program that is loaded during SCSI IPL or SCSI Dump. This information will be given to the IPLed operating system and will be ignored by the machine loader. The IPLed operating system (or standalone dump program) has to support this feature. Any line breaks you enter are transformed into spaces before being saved.