Troubleshooting
Problem
Possible recovery options for refernce code B6000202 - Unrecoverable read error - if load source disk unit is mirrored
Symptom
SRCB6000202
Cause
Unrecoverable read error on Load Source unit while accessing System LIC during IPL
Resolving The Problem
IBM i IPL code does not automatically attempt to use the mirrored copy of the Load Source when damage has occurred in the SLIC area of the primary Load Source disk unit. IPL from an existing disk configuration uses the Load Source location information in the partition's Vital Product Data to determine where LIC is loaded, not the LS tagging in the partition configuration. Because the partition has not IPL'd far enough to start the SLIC mirroring function, the failing Load Source disk unit is not suspended. Since the failing Load Source disk unit is still in an Active state, the Service Processor does not use the mirrored copy of the Load Source for the IPL.
In light of this, there are two recommended recovery options:
1) The easiest solution is to try D-mode IPL from media and slip install SLIC to the Load Source disk unit. Retry the B mode IPL to see if it is successful.
2) Physically unplug the Load Source disk unit.
On the next IPL, the Service processor will detect that the Load Source disk unit is not present and it will perform the IPL using the mirror mate Load Source disk.
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Document Information
Modified date:
18 December 2019
UID
nas8N1021038