IBM DS4800 User Manual

The storage subsystem provides flexibility in configuring a RAID array. (The
DS4800 disk capacity is scalable from 36 GB to over 89 TB.) A minimal storage
subsystem configuration would consist of one DS4800 and one DS4000 storage
expansion enclosure. The storage expansion enclosure can contain as few as two
disk drives. The maximum number of disk drives a DS4800 can support is 224
drives. The maximum number of storage expansion enclosures that can be
attached to the DS4800 varies depending on the type of the attached DS4000
storage expansion enclosures and whether there is a mix of different types of
DS4000 storage expansion enclosures. Currently, the DS4800 storage subsystem
models 80A/H, 82A/H, 84A/H and 88A/H support the following DS4000 storage
expansion enclosures:
v EXP100
v EXP710
v EXP810
See
Table 4 for the maximum number of storage expansion enclosures that can be
attached to the DS4800 storage subsystem by storage expansion enclosure type.
Table 4. Maximum number of storage expansion enclosures
Enclosure type
Maximum number of
enclosures in a redundant
DS4800 drive channel pair
Maximum number of
enclosures in a DS4800
subsystem
EXP100 8 16
EXP710 8 16
EXP710 and EXP100 8 16
EXP810 7 14
EXP710 and EXP810 7 14 (or 15)
1
EXP100 and EXP810 7 14 (or 15)
1
1
The value 15 assumed that one of the redundant DS4800 drive channel pairs must have
only EXP710 or only EXP100 enclosures attached.
Power
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Interconnect-
battery
RAID controllers
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Power
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ds48013
Figure 2. Location of components in the storage subsystem
Chapter 1. Introduction 9
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IBM DS4800 Specifications

General

Brand	IBM
Model	DS4800
Category	Storage
Language	English