This file provides summarized statistics for the specified disk units. The following information applies if you have installed the latest PTFs.
One record is created per sample per disk unit path.
The path to a disk unit can be uniquely identified by either the device resource name or the 16 byte combination of the fields STBUSNUM, STBOARDNUM, STCARDNUM, STIOAADDR, STIOBUSNUM, STIOCTLADR, STIODEVADR, and STUNITNUM.
| Field Name | Description | Attribute |
|---|---|---|
| INTERVAL | Interval number. | B (8) |
| DEVRNAME | Device resource name associated with this disk unit path. | C (10) |
| STBUSNUM | System bus number. The system bus number of the I/O device. | B (2) |
| STBOARDNUM | System board number. The system board number of the I/O device. | B (2) |
| STCARDNUM | System card number. The system card number of the I/O device. | B (2) |
| STIOAADDR | I/O adapter address. The adapter address of the I/O device. | B (2) |
| STIOBUSNUM | I/O bus number. The bus number of the I/O device. | B (2) |
| STIOCTLADR | I/O controller address. The controller address of the I/O device. | B (2) |
| STIODEVADR | I/O device address. The device address of the I/O device. | B (2) |
| STUNITNUM | Unit number. The unit number for which I/O statistics are being returned. | B (2) |
| STASPNUM | ASP number. The ASP number associated with this disk unit path. | B (2) |
| STFIRSTIO | First I/O time. The time the first I/O occurred (in microseconds) from the session creation time. | B (8) |
| STLASTIO | Last I/O time. The time the last I/O occurred (in microseconds) from the session creation time. | B (8) |
| STWRTTOTAL | Total write time. The total time spent performing write operations (in microseconds). | B (8) |
| STWRTDQ | Deferred queue write time. The total amount of time the write request waited on the deferred queue (in microseconds). | B (8) |
| STWRTCNT | Write count. The total number of write operations. | B (8) |
| STWRTPGCNT | Write page count. The total number of pages written. | B (8) |
| STWRTMIN | Minimum write time. The minimum amount of time used to perform a write operation (in microseconds). | B (8) |
| STWRTMINDQ | Minimum deferred queue write time. the minimum amount of time the write request waited on the deferred queue (in microseconds). | B (8) |
| STWRTMAX | Maximum write time. The maximum amount of time used to perform a write operation (in microseconds). | B (8) |
| STWRTMAXDQ | Maximum deferred queue write time. The maximum amount of time the write request waited on the deferred queue (in microseconds). | B (8) |
| STRDTOTAL | Total read time. The total time spent performing read operations (in microseconds). | B (8) |
| STRDDQ | Deferred queue read time. The total amount of time the read request waited on the deferred queue (in microseconds). | B (8) |
| STRDCNT | Read count. The total number of read operations. | B (8) |
| STRDPGCNT | Read page count. The total number of pages read. | B (8) |
| STRDMIN | Minimum read time. The minimum amount of time used to perform a read operation (in microseconds) | B (8) |
| STRDMINDQ | Minimum deferred queue read time. The minimum amount of time the read request waited on the deferred queue (in microseconds). | B (8) |
| STRDMAX | Maximum read time. The maximum amount of time used to perform a read operation (in microseconds). | B (8) |
| STRDMAXDQ | Maximum deferred queue read time. The maximum amount of time the read request waited on the deferred queue (in microseconds). | B (8) |
| STOTHTOTAL | Total other I/O time. The total time spent performing other I/O operations (in microseconds). | B (8) |
| STOTHDQ | Deferred queue other I/O time. The total amount of time an other I/O operation waited on the deferred queue (in microseconds). | B (8) |
| STOTHCNT | Other I/O count. The total number of other I/O operations. | B (8) |
| STOTHPGCNT | Other I/O pages count. The total number of pages involved in other I/O operations. | B (8) |
| STOTHMIN | Minimum other I/O time. The minimum amount of time used to perform an other I/O operation (in microseconds). | B (8) |
| STOTHMINDQ | Minimum deferred queue other I/O time. The minimum amount of time an other I/O operation waited on the deferred queue (in microseconds). | B (8) |
| STOTHMAX | Maximum other I/O time. The maximum amount of time used to perform an other I/O operation (in microseconds). | B (8) |
| STOTHMAXDQ | Maximum deferred queue other I/O time. The maximum amount of time an other I/O operation waited on the deferred queue (in microseconds). | B (8) |
| STDATAMISS | I/O data missed. Indicates that some I/O data for this disk unit was missed because the collection buffer wrapped during the interval.
Reducing the amount of time between intervals may prevent this missed data.
0 = no data missed.
| C (1) |
| STRESERVE1 | Reserved | B (8) |
| STRESERVE2 | Reserved | B (8) |
| STRESERVE3 | Reserved | B (8) |