Front View Of The Lff Storage Expansion - IBM DS8800 Introduction And Planning Manual

Interface Controller Cards
Figure 8. Back view of the storage expansion enclosure
The DS8800 now supports a new high-density and lower-cost large form factor
(LFF) storage enclosure. This enclosure accepts 3.5" drives, offering 12 drive slots.
The previously introduced SFF enclosure offers 24, 2.5" drive slots. The LFF
enclosure has a different appearance from the front than does the SFF enclosure,
with its 12 drives slotting horizontally rather than vertically.
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Figure 9. Front view of the LFF storage expansion enclosure
The following notes provide additional information about the labeled components
in the Figure 9:
1. Status indicators for the enclosure
2. 12 LFF drives, 3.5"
Performance features
Features of the expansion storage enclosure include:
v Support for up to four enclosures per loop
v Redundant, integrated power and cooling
v 6 Gbps SAS data transfer rate to the disk drives
v Support for optical 8 Gbps FC-AL
v FC-AL to SAS protocol conversion
Power supply and cooling
Power supply features and requirements include:
v The power and cooling system are composed of two redundant power supply
v Each power supply contains fans to supply cooling for the entire enclosure.
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Introduction and Planning Guide
Back View
Power Supplies
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units, accepting 208 V dc voltage.