Data recovery and general information
For use by authorized service providers.
Recovery procedures
Verify the repair
Power on/off the system and logical partitions
Expansion unit power procedure
Storage I/O card modes and jumpers
System reference codes (SRC) address formats
Cryptographic I/O processor
Determine if the system has logical partitions
Determine if the system has guest partitions
Determine the release level of a guest partition
Determine the hosting partition of a guest partition
Determine the load source disk and alternate IPL device
Reclaim IOP cache storage
Recovery procedures
For use by authorized service providers.
This topic contains the procedures and information to recover from disk unit failures with a minimum loss
of customer data.
The procedures in this section do not give support to rack-mounted disk units such as an IBM 9337. For
disk service support on rack-mounted disk units, use the FC 504x Problem Analysis and Repair and Parts,
SY44-4934 information.
The procedures in this section do not give support to IBM 2105 disk units. Use the ″IBM 2105
maintenance″ information for disk service support.
Start all service actions at Start disk service here and follow the steps in the procedures to determine the
following:
v The storage protection method that is used by the customer
v When and how to save customer data
v When to exchange a failing disk unit
v How to restore saved data
v How to resume storage protection
The following sub-topics are included in the recovery procedures topic:
Start disk service here
Analyze hardware problems 539
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