Clustering Support; Inventory Checklist; Features At A Glance - IBM DS4800 User, Installation And Maintenance Manual

Table 2. Features at a glance
General
v Modular components:
– RAID controllers (2), with either 2
GB, 4 GB or 8 GB of cache memory
per controller (depending on model)
– Power supply-cooling fan units (2)
– Interconnect-battery unit (1)
v Technology:
– Support for RAID 0, 1, 3 and 5 disk
arrays
– Support for clustering
– Fibre channel host interface
– Redundant controllers and power
supply/cooling system
– Hot-swap technology for controllers,
power supply-fan units, cache
battery, and interconnect-battery unit
Attention: Never remove the
interconnect-battery unit unless
directed to do so by an IBM Service
representative.

Clustering support

Clustering is a means of sharing array groups among controllers to provide
redundancy of controllers and servers. This redundancy is important if a hardware
component fails. If a hardware component failure occurs in a cluster, another server
takes ownership of the array group.
Clustering requires software specific to your operating system. For more information
about clustering, go to the following Web sites
v www.pc.ibm.com/us/compat/nos/matrix.shtml
v www-03.ibm.com/servers/storage/disk/ds4000/ds4800/interop.html

Inventory checklist

After you unpack the DS4800, verify that you have the following items. See
"Storage server components" on page 7 for the locations of hardware components
on the DS4800.
Note: Depending on your DS4800 order, your shipping box might contain additional
v Hardware
v User interface:
– Built-in power, activity, and fault
(Needs Attention) light emitting
diodes (LEDs)
– Identification labeling on customer
replaceable units (CRUs), rear LEDs,
switches, and connectors
– Easy-to-replace power supply-fan
units, RAID controllers, cache battery,
and interconnect-battery unit
RAID controllers
v Fibre channel interface: sixteen small
form-factor pluggable (SFP) ports for
incoming and outgoing fibre-channel
cables (There are eight SFP ports on
each RAID controller: four ports are
reserved for host connections and four
ports are reserved for drive expansion
enclosures connections.)
v Host connections: Four
1-Gbps/2-Gbps/4-Gbps
(auto-negotiated) fibre channel host-side
connections per controller
materials not listed in the following checklist. Review the inventory checklist
included in the DS4800 shipping box for any additional parts, and use that
checklist in combination with the following information.
– One DS4800 bezel (front cover)
– Two RAID controllers (shipped installed in the DS4800)
– Two power supply-fan units (shipped installed in the DS4800)
– One interconnect-battery unit with two cache-backup battery packs (shipped
installed in the DS4800)
– Two line cord jumpers
Attached storage expansion enclosures
v Four dual-ported drive channel
connections (2 per RAID controller)
enabled to support 2-Gbps/4 Gbps fibre
channel connections
v Supports attachment of DS4000 2 Gbps
EXP100 and EXP710, and 2 Gbps/4
Gbps EXP810 storage expansion
enclosures
Note: DS4000 EXP700s are not
supported by the DS4800 unless they
have been upgraded (with the DS4000
EXP700 Models 1RU/1RX
Switched-ESM Option Upgrade Kit) to
have the same internal switched
capabilities as the DS4000 EXP710.
Attention: The DS4800 does not
support the attachment of storage
expansion enclosures operating at 1
Gbps, such as the EXP500.
Chapter 1. Introduction
3