Logical partition concept: Load source
Each logical partition must have one disk unit designated as the load source that contains the Licensed Internal Code and the configuration data for the logical partitions.
A server uses the load source to start the logical partition. The server always identifies this disk unit as unit number 1.
The logical partition configuration data on the load source of the primary partition is the master copy. The server uses this copy to check the integrity of the configuration data that it maintains on the load source of each logical partition.
Any time the load source of a logical partition is erased, the logical partition configuration data must be recovered. On a secondary partition, the server automatically rewrites the data by using the master copy from the primary partition. On the primary partition, manually recover the configuration data.
When you move the load source for a logical partition to a different server or different logical partition as a non-configured disk unit, you need to clear its configuration data. This recovery action corrects configuration data problems.
- Load source placement rules for secondary partitions
Each secondary partition has a specific slot placement for its load source depending on the type of system unit or expansion unit where it is installed. An IOP and IOA is then required to control the load source disk unit for each partition.
Parent topic:
Hardware for logical partitionsRelated concepts
Logical partition concept: tagged resource Logical partition concept: Disk units Logical partition concept: Removable media device and alternate restart (IPL) devices Logical partition concept: IOP