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- Description
- Specifications
Feature #ELLS is the EXP24SX SAS Storage Enclosure ordered for the IBM Power System L922, machine type 9008. It is a storage expansion enclosure with twenty-four 2.5-inch SFF SAS bays that holds up to 24 hot-swap HDDs or SSDs in 2 EIA of a 19-inch rack. The SFF bays use SFF Gen2 (SFF-2) carriers or trays that are identical to the ones in the earlier EXP24S drawer, and two power cords feed its redundant AC power supplies.
With Linux and VIOS the enclosure can be ordered with four sets of six bays (mode 4), two sets of 12 bays (mode 2) or one set of 24 bays (mode 1). Mode 1 cannot mix HDDs and SSDs in the drawer; in mode 2 or mode 4 the two kinds can share a drawer as long as no logical split mixes them; for example, a mode 2 drawer can have one set of 12 SSDs and one set of 12 HDDs. The mode can be changed in the field only with software commands and a specific procedure carried out by a skilled technician.
Four mini-SAS HD ports connect the enclosure to PCIe3 SAS adapters or to an integrated SAS controller in the Power L922. The adapters that support the EXP24SX are the PCIe3 RAID SAS Adapter Quad-port 6 Gb x8 (#EJ0J, #EJ0M, #EL3B or #EL59) and the PCIe3 12 GB Cache RAID Plus SAS Adapter Quad-port 6 Gb x8 (#EJ14), while PCIe2 and PCIe1 SAS adapters are not supported. SAS YO12 or X12 cables with mini-SAS HD narrow connectors make the attachment: the 3 m copper X12 (#ECDJ) and the 1.5 m and 3 m copper YO12 (#ECDT, #ECDU). Six rear connectors, T1, T2 and T3 in pairs, carry the SAS signals.
| Feature code | #ELLS |
| Description | EXP24SX SAS Storage Enclosure |
| Machine type | 9008 (Power L922) |
| Drive bays | 24 x 2.5-inch SFF-2 (Gen2), hot-swap |
| Drive types | HDD or SSD |
| Rack space | 2 EIA, 19-inch rack |
| Modes (Linux/VIOS) | 1 (24 bays), 2 (2 x 12), 4 (4 x 6) |
| SAS adapters | #EJ0J, #EJ0M, #EL3B, #EL59, #EJ14 |
| Cables | SAS X12 #ECDJ; SAS YO12 #ECDT, #ECDU |
| Power | redundant AC supplies, two power cords |