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V2X/SVA - Interface Control Check - IOS000I message with IFCC, SIM, MIH Timer Pop (Doc ID 1309106.1)

Last updated on NOVEMBER 06, 2019

Applies to:

Sun StorageTek V2X SVA Disk System - Version Not Applicable and later
IBM z/OS on System z


IOS000I message with IFCC, SIM, MIH Timer Pop in the message.

This message is flagged as an error by the CPU and Aborts the exchange.

The customer job may fail as described above due to I/O chain being terminated by an IFCC.


Contributing Factors
IBM corrected an error in FICON Specification FC-SB-4 clause 8.6.5 SB Cyclic-Redundancy- Check field for READ operation 8.9.1.

After this error was corrected at the CPU level, it was found the V2Xf and V2X4f channel protocol logic is flawed.

NOTE: This specification applies for all FICON channel adapters. At the writing of this FAB, the Z196 is the only CPU with the correction. IBM intends to make their Z9 and Z10 processors in compliance in the future.


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