There is one section per rank in a extent pool.
| Offsets | Name | Length | Format | Description | |
|---|---|---|---|---|---|
| 0 | 0 | R748RRID | 2 | binary | Rank identifier. |
| 2 | 2 | R748RPNM | 2 | binary | Extent pool number. |
| 4 | 4 | R748RCNT | 2 | binary | Count of arrays in rank. |
| 6 | 6 | R748RAIX | 2 | binary | Index to first Array section of rank. |
| 8 | 8 | R748RBYR | 8 | l_float | Rank 128 KB read. |
| 16 | 10 | R748RBYW | 8 | l_float | Rank 128 KB write. |
| 24 | 18 | R748RROP | 8 | l_float | Rank read operations. |
| 32 | 20 | R748RWOP | 8 | l_float | Rank write operations. |
| 40 | 28 | R748RKRT | 8 | l_float | Rank read response time in units of 16 milliseconds. |
| 48 | 30 | R748RKWT | 8 | l_float | Rank write response time in units of 16 milliseconds. |
| 56 | 38 | R748RTQ | 1 | binary | Rank type qualifier:
|