IBM i 830, Repair Manual

Page: 959 / 1000

– For system models 830, 840, SB2 and SB3, this disk unit must be located in
position D31, D32, D33, or D34.
Secondary Partition:
– See ’Locating a Secondary Partition’s Load Source From the Primary
Partition’s Console’ in the iSeries Service Functions information.
v
Remote load source – A load source disk unit that is not a local load source. A
load source that is not in one of the positions described for ’Local load source’.
For systems in which both of the mirrored load source disk units are local load
sources:
The system can use either disk as its source for IPL data. The disk that first reports
to the service processor is the one that is used. The system starts the IPL with this
device and later synchronizes the second load source disk with the first.
If the first load source disk fails after the Licensed Internal Code determines that
the system has mirrored protection, the Licensed Internal Code performs the IPL
by using the second load source disk.
If the first load source disk fails before the Licensed Internal Code determines that
the system has mirrored protection, the IPL stops with a system reference code
(SRC) displayed.
If the system starts the IPL on a load source disk that contains data which is
backlevel compared to the data on the other load source, the Licensed Internal
Code attempts to start the IPL from the second load source disk. If the second
attempt fails, the IPL stops with an SRC displayed.
For systems in which one of the mirror load source disk units is a local load
source, and one load source is a remote load source:
The system can use only the local load source as its source for IPL data. The
system starts the IPL with this local load source device and later synchronizes the
remote load source disk with the data on the local load source. If the local load
source disk fails, the IPL stops with a system reference code (SRC) displayed.
Finding the Load Source Disks on Systems with Mirrored
Protection
When the system auxiliary storage pool (ASP1) has mirrored protection, the system
has two disk units that are load source disks.
Use the Work with disk units option under dedicated service tool (DST) or system
service tool (SST) to display the configuration.
Alternate IPL Device
Note: Determine if the system has logical partitions. Go to “Determining if the
System Has Logical Partitions” on page 943, before continuing with this
procedure.
Attention: If the system has logical partitions, this procedure is for the Primary
partition only . To locate the alternate IPL device for a secondary partition see
iSeries Service Functions .
Determining Load Source, Alternate IPL
Chapter 6. Data Recovery Procedures and General System Information
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