Table 6. RAID controller specifications (continued)
Category Criteria Specification
Data transfer rates Fibre channel host Up to 4 Gb/sec maximum.
Support 1, 2 and 4 Gbps FC
speeds.
Fibre channel drives Up to 4 Gb/sec maximum
(depends on storage
expansion enclosure speed).
Support 2 and 4 Gbps drives
only. Does not support 1Gbps
drives.
Ethernet 10BASE-T
100BASE-T
Power supply-fans
The DS4800 has two power supply and fan units. Each power supply and fan unit
contains a power supply, a fan, and a battery charger. Each power supply provides
power to the controllers by converting incoming AC voltage to the appropriate DC
voltages. If one power supply and fan unit is turned off or malfunctions, the
remaining power supply and fan unit can maintain electrical power and cooling to
the storage subsystem.
Note: Contact IBM for information about possible future DC-to-DC power supply
support.
Install the power supply and fan units from the front of the storage subsystem.
Figure 6 on page 18 shows how a power supply and fan unit slides into the storage
subsystem. The levers that secure the left power supply and fan unit into the
storage subsystem are shown in the released position. The levers that secure the
right power supply and fan unit into the storage subsystem are shown in the latched
position.
Note: Although both power supply and fan units in the DS4800 chassis are
identical, they are seated in the DS4800 chassis in opposite orientations.
The left and right power supply and fan units are installed so that the LED
column of each power supply and fan unit is located towards the interior of
the DS4800, along the side of the interconnect-battery unit.
Chapter 1. Introduction 17
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