Exp12S Sas Expansion Drawer - IBM Power 720 Overview

Figure 2-35 EXP24S SFF Gen2-bay drawer rear connectors
An EXP24S drawer in mode 4 can be attached to two or four SAS controllers and provide a
great deal of configuration flexibility. An EXP24S in mode 2 has similar flexibility. Up to 24
HDDs can be supported with any of the supported SAS adapters/controllers.
Include the EXP24S no-charge specify codes with any EXP24S orders to indicate, to IBM
manufacturing, the mode to which the drawer should be set and the adapter, controller, and
cable configuration that will be used.
For details about SAS cabling, see the serial-attached SCSI cable planning documentation:
http://pic.dhe.ibm.com/infocenter/powersys/v3r1m5/index.jsp?topic=/p7had/p7hadsasc
abling.htm

2.10.3 EXP12S SAS expansion drawer

The EXP12S (FC 5886) expansion drawer has twelve 3.5-inch form factor SAS bays. This
drawer supports up to 12 hot-swap SAS HDDs or up to eight hot-swap SSDs. The EXP12S
includes redundant AC power supplies and two power cords. Although the drawer is one set
of 12 drives, which is run by one SAS controller or one pair of SAS controllers, it has two SAS
attachment ports and two service managers for redundancy. The EXP12S takes up a 2U
space in a 19-inch rack; the SAS controller can be a SAS PCIe adapter or pair of adapters.
The drawer can be attached to the Power 720 and Power 740 either by using the FC EJ01
storage backplane, providing an external SAS port, or using the following SAS adapters:
PCIe LP RAID & SSD SAS adapter 3 Gb (FC 2053, CCIN 57CD)
PCIe RAID & SSD SAS adapter 3 Gb (FC 2054, CCIN 57CD)
PCIe LP Dual -x4-Port SAS adapter 3 Gb (FC 5278, CCIN 57B3)
PCIe 380 MB Cache Dual -x4 3 Gb SAS RAID adapter (FC 5805, CCIN 574E)
PCI-X DDR Dual -x4 SAS adapter (FC 5900)
PCIe Dual -x4 SAS adapter (FC 5901, CCIN 57B3)
PCI-X DDR Dual - x4 3 Gb SAS RAID adapter (FC 5902)
PCI-X DDR 1.5 GB Cache SAS RAID adapter (FC 5904)
PCI-X DDR Dual -x4 SAS adapter (FC 5912, CCIN 572A)
PCIe2 1.8 GB Cache RAID SAS adapter Tri-Port 6 Gb (FC 5913, CCIN 57B5)
PCIe2 RAID SAS adapter Dual-Port 6 Gb (FC ESA1, CCIN 57B4)
PCIe2 LP RAID SAS adapter Dual-Port 6 Gb (FC ESA2, CCIN 57B4)
Note: If you use a PCI-X SAS adapter within the Power 720 and 740, a PCI-X DDR 12X
Expansion Drawer (FC 5796) or a 7314-G30 drawer is required.
A maximum number of 28 EXP12S drawers can be attached to a Power 720 and Power 740
server.
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IBM Power 720 and 740 Technical Overview and Introduction