Chapter 6. Data Recovery Procedures and General System
Information
RecoveryProcedures...........893
Disk Service Support ..........893
StartDiskServiceHere.........894
Determining Storage Protection Status . . . 894
Exchanging a Disk Unit with Device Parity
Protection .............896
Exchanging a Disk Unit with Mirrored
Protection .............897
Resuming Mirrored Protection.......902
Disk Unit Data Save and Initialize .....903
Disk Unit Initialize and Disk to Disk Copy . . 912
DSTProcedures ...........917
Recover Remote Load Source ......917
Copy the Contents of LIC Log......919
Verifying the Repair ...........920
Verify Dedicated Repair. .........920
Verify Concurrent Repair ........921
Powering On and Powering Off the System and
Logical Partitions ............922
Powering On the System ........922
Powering On a Secondary Partition ....923
Powering Off the System ........923
Control Panel Power Button ......923
Powering Off a System With Multiple Logical
Partitions .............924
Powering Off a System with Multiple Logical
Partitions Using the Control Panel or
Primary Partition’s Console ......925
Powering Off a Secondary Partition ....926
Expansion Tower and SPCN Controlled Expansion
UnitPowerProcedure..........926
StorageI/Ocardmodesandjumpers.....934
Setting or changing the mode of an I/O card 934
Mode jumper has been overridden .....935
Mode jumper is missing .........936
SRC Address Formats ..........936
HardwareSRCFormats.........940
Important Cryptographic I/O Processor
Information..............942
Determining if the System Has Logical Partitions 943
Determining if the System Has Guest Partitions 943
Determining the Release Level of a Guest Partition 943
Determining the Hosting Partition of a Guest
Partition ...............944
Determining the Load Source Disk and Alternate
IPLDevice..............944
Introduction .............944
Finding the Load-Source Disk on Systems
without Mirrored Protection .......944
What You Should Know about Load Source
Disks on Systems with Mirrored Protection . . 944
Finding the Load Source Disks on Systems with
Mirrored Protection ..........945
Alternate IPL Device ..........945
Search Sequence for the Alternate IPL Device 946
External Device Addressing ......946
Reclaim IOP Cache Storage.........947
Recovery Procedures
Disk Service Support
This section 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” on page 894 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
© Copyright IBM Corp. 2000, 2001 893
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