Device adapter pair IDs – Models 981, 98E (three-phase power)
Device adapter pair IDs identify either the two device adapter cards in an I/O enclosure, or a pair of storage enclosure RAID controllers.
- For FC-AL storage enclosures:
- A device adapter pair ID identifies the two device adapter cards in the I/O enclosures. The device adapter cards provide redundancy for the FC-AL loops that connect to one or more storage enclosure pairs.
- For high-performance flash enclosures:
- A device adapter pair ID identifies the pair of storage enclosure RAID controllers and their associated interfaces to the I/O enclosures.
- For high-performance flash enclosures Gen2 (HPFE Gen2)
- A device adapter pair ID identifies the microbay pair (also known as flash RAID adapters) and their associated interfaces to the I/O enclosures.
Note: For flash configurations with HPFE Gen2, see Figure 3.


Note: Only flash configuration DA pairs are shown. HPFE Gen2 flash enclosure locations vary.

| Index | For this DA pair | If this HPFE (Gen1) is present, a microbay pair cannot be present on the same DA pair: | If this microbay pair is present, an HPFE (Gen1) cannot be present on the same DA pair: | Notes |
|---|---|---|---|---|
| 1 | 17 | R1-B01 | R1-M04 | Rack-1 can contain R1-B01 or R1-M04, but not both. |
| 2 | 19 | R1-B02 | R1-M06 | Rack-1 can contain R1-B02 or R1-M06, but not both. |
| 3 | 21 | R2-B01 | R2-M08 | Rack-2 can contain R2-B01 or R2-M08, but not both. |
| 4 | 23 | R2-B02 | R2-M10 | Rack-2 can contain R2-B02 or R2-M10, but not both. |