Action depends on the reason for the failure, which is indicated by the return code as follows:

03

ESS statistics have been requested by RMF Monitor I gathering option ESS, but no enterprise disk system was found that supports ESS statistics.

To suppress this message, change the Monitor I option statement to NOESS until an enterprise disk system is available that supports the ESS statistics.

04

GETMAIN failed for a caching subsystem during an attempt to obtain storage for ESS counters.

Increase the REGION parameter in the RMF procedure and restart RMF.

08

An I/O error occurred in a caching subsystem during an attempt to obtain ESS counters. If the failure is intermittent, it might result from a RESERVE having been issued against a 3390 device.

Use the device number to locate the failing control unit. If the message is issued in consecutive intervals, and no RESERVE is active, search the problem reporting database for a fix. If there is no fix, save the SMF74-8 records and the system log. Report the problem to the IBM® Support Center.

20

The request to obtain ESS counters failed with an AOM return code 4 and reason code 20. AOM could not access the RMF internal output buffer to store the ESS counters.

Search the problem reporting database for a fix. If there is no fix, save the SMF74-8 records and the system log. Report the problem to the IBM Support Center.

36

At least one enterprise disk system had no path available when RMF attempted to obtain ESS counters.

Ensure that there is a path to each enterprise disk system from the system on which RMF is running.

40

An enterprise disk system had no path available when RMF attempted to obtain ESS counters.

Ensure that there is a path to each enterprise disk system from the system on which RMF is running.

56

RMF received a bad return code from AOM when attempting to obtain ESS counters and the AOM reason code returned is other than 04, 16 or 20. This error may result from an online device with no operational path that RMF uses to retrieve the ESS counters. Make sure that there is at least one operational path from the system on which RMF is running to the devices contained in the enterprise disk system.

Search the problem reporting database for a fix. If there is no fix, save the SMF74-8 records and the system log. Report the problem to the IBM Support Center.

60

An I/O error occurred in a caching subsystem during an attempt to obtain ESS counters. The attempt to obtain the device counters was terminated by a timeout condition.

Use the device number to locate the failing control unit. Search the problem reporting database for a fix. If there is no fix, save the SMF74-8 records and the system log. Report the problem to the IBM Support Center.