MAP5230 Isolating a fixed block read data failure

Before you begin

Note: Customer disruption might occur if microcode and power boundaries are not in the proper conditions for this service action. Verify that you start all service activities in Start here.

About this task

You are here to resolve a Data Check failure that has been logged with one of the SRC BE35 values listed below. An action to repair hardware or microcode is necessary; the action required might be to repair another problem in the log.

This MAP isolates for the following SRC BE35s:
  • SRC BE353490, customer data sequence number validation error with data LRC.
  • SRC BE3534A0, customer data sequence number validation error without data LRC.
  • SRC BE3534AF, third or later repeat of customer data sequence number validation error on the same target LBA (Logical Block Address), track or volume.
  • SRC BE3534B0, SCSI Send Diagnostic command initiated data transfer validation process failure.
  • SRC BE354960, second occurrence of customer data sequence number validation error on the same target LBA (Logical Block Address), track or volume.

MAP5230 Section-1

Procedure

Refer to the table that follows for the SRC BE35 that requires problem resolution. Determine the necessary hardware or microcode repair action.
Table 1. SCSI Read Data Failure SRC BE35 Repairs
SRC BE35 Description Recommended Action
3490

Customer Data Sequence Number validation error. Data transferred from a DDM to cache memory is not from the expected Logical Block Address (LBA). The Sequence Number in the received LBA does not match the expected Sequence Number. Sequence number validation also detected LRC indicating that the LBA data is defective.

LRC failures are a higher priority symptom. If a serviceable event exists with SRC value BE3533xx (LRC failure), the recommended action is to repair the SRC BE3533XX problem.

If a problem with SRC BE35 33xx does not exist then the probable cause for this failure is a Microcode Logic Error. The recommended action is to contact your next level of support for fault isolate and repair assistance.
34A0, 34AF, or 4960 Customer Data Sequence Number validation error. Data transferred from a DDM to cache memory is not from the expected Logical Block Address (LBA). The Sequence Number in the received LBA does not match the expected Sequence Number.

SRC BE3534AF indicates that additional Sequence Number error events have been logged for the same target LBA, track or volume.

 An error has occurred during the reading or writing of data from the track, volume or array.

The recommended action is to contact your next level of support for fault isolate and repair assistance.

Customer repair action might be required to restore data after the hardware problem has been resolved.

34B0 A SCSI Send Diagnostic command initiated data transfer validation process failed. A write or read data transfer failure would be logged as another error event and SRCBE35. If no other error has been logged, then this failure indicates that the data read did not match the test pattern data written.

This problem should only be used to determine a repair action if the problem log does not contain any other records for a hardware failure that would be associated with this diagnostic failure SCSI port, data path and target volume.

If you are unable to identify another hardware repair action, then the recommended action is to contact your next level of support for fault isolate and repair assistance.