IBM DS4800 - Power Supply-Fans; RAID Controller Specifications

Table 5 lists the technical specifications for the RAID controllers.
Table 5. RAID controller specifications
Category Criteria Specification
Memory Cache size 2 GB, 4 GB or 8 GB,
depending on the model
Interface Fibre Channel Host port 4 fiber-optic ports per
controller
2 Ethernet ports per controller
(for out-of-band management)
Fibre Channel Drive
expansion port
4 fiber-optic ports per
controller
Note: Each DS4800
controller drive channel has
two ports. There are two drive
channels per DS4800
controller.
Storage Expansion Enclosure
Support
Redundant drive channel
pairs
2 per controller
Maximum number of drives
per redundant drive channel
pair
112 drives per redundant
drive channel pair (either 8
storage expansion enclosures
with 14 drives each or 7
storage expansion enclosures
with 16 drives each). See
Table 3 on page 9.
Maximum number of drives
supported by one DS4800
224 drives (2 redundant drive
channel pairs with 112 drives
in each drive channel pair)
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-fans. Each power supply-fan 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-fan is turned off or malfunctions, the remaining power supply-fan can
maintain electrical power and cooling to the storage subsystem.
Note: Contact IBM for information about possible future DC-to-DC power supply
support.
Chapter 1. Introduction 15