Error statistics, the number of times I/O devices have failed for
specific device-dependent failures, are kept in a main storage table
called the device statistics table. The device's error recovery procedure
(ERP) updates the table.
Note: Intermediate counters for buffered log devices, such as the IBM® 3330 and 3850, are kept in the
device's error recording buffer and are updated by the device's ERP.
An overflow condition or end-of-day (EOD) request on these devices
causes the information to be recorded on the logrec data set as an
MDR record.