Data Blocks Beginning with Block 1
+------------------------------+-----------------------------+ <--+
|   Physical Record Number     | Size of This Error Record   |    |
+------------------------------+-----------------------------+    |
|           Device ID          |    Unit Number              |    |
+------------------------------+-----------------------------+    |
|Number of occurrences of this |    Retry Count              |    |
|error with identical registers|                             |    |
+------------------------------+-----------------------------+    |
|                          Date of entry                     |    |
+------------------------------------------------------------+    |
|                          Time of entry                     |    |
|                           (Two words)                      |    |
+------------------------------------------------------------+    |
|                  Physical block number (Q.BLKN)            |  For Each
+------------------------------------------------------------+  Device 
|                    User buffer address (Q.BUFF)            |  Error
+------------------------------------------------------------+    |
|                       Word count (Q.WCNT)                  |    |
+------------------------------------------------------------+    |
|                  PAR1 value (Q.PAR) -- XM only             |    |
+------------------------------+-----------------------------+    |
|   Total number of retries    | Number of registers to log  |    |
+------------------------------+-----------------------------+    |
|                      (The device registers)                |    |
|                              .                             |    |
|                              .                             |    |
|                              .                             |<---+
+------------------------------+-----------------------------+
|   Physical record number     |  Size of this error record  |<---+ 
+------------------------------+-----------------------------+    |
| Number of memory registers   |            Parity ID        |    |
+------------------------------+-----------------------------+    |
|    Number of occurrences of this error with the same PC    |    |
+------------------------------------------------------------+    |
|                         Date of entry                      |    |
+------------------------------------------------------------+    |
|                         Time of entry                      |    |
|                          (Two words)                       |    |
+------------------------------------------------------------+    |
|                             PC                             |    |
+------------------------------------------------------------+    |
|                             PSW                            |    |
+------------------------------------------------------------+  For Each
|                            MPR1                            |  Memory
+------------------------------------------------------------+  Error
|                      Address of MPR1                       |    |
+------------------------------------------------------------+    |
|          (Information for up to 16 memory registers:)      |    |
|                              .                             |    |
|                              .                             |    |
|                              .                             |    |
+------------------------------------------------------------+    |
|     Memory system error register (if cache is present)     |    |
+------------------------------------------------------------+    |
|       Cache control register (if cache is present)         |    |
+------------------------------------------------------------+    |
|         Hit/Miss register (if cache is present)            |    |
+------------------------------------------------------------+<---+