IBM p5 550, Technical Overview And Introduction

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Chapter 2. Architecture and technical overview
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2.9.1 IBM TotalStorage EXP24 Expandable Storage
The IBM TotalStorage® EXP24 Expandable Storage disk enclosure, Model D24 or T24, can
be purchased together with the p5-550 or p5-550Q and provides low-cost Ultra320 (LVD)
SCSI disk storage. This disk storage enclosure device provides more than 7 TB of disk
storage in a 4U rack-mount (Model D24) or compact deskside (Model T24) unit. Whether high
availability storage solutions or simply high capacity storage for a single server installation,
the unit provides a cost-effective solution. It provides 24 hot-swappable disk bays, 12
accessible from the front and 12 from the rear. Disk options that can be accommodated in any
of the four six-packs disk drive enclosure are 73.4 GB, 146.8 GB, or 300 GB 10 K rpm or
36.4 GB, 73.4 GB, or 146.8 GB 15 K rpm drives. Each of the four six-packs disk drive
enclosures can be attached independently to an Ultra320 SCSI or Ultra320 SCSI RAID
adapter. For high available configurations, a dual bus repeater card (FC 5742) allows each
six-pack to be attached to two SCSI adapters, installed in one or multiple servers or logical
partitions. Optionally, the two front or two rear six-packs can be connected together to form a
single Ultra320 SCSI bus of 12 drives.
2.9.2 IBM System Storage N3000 and N5000
The IBM System Storage N3000 and N5000 line of iSCSI enabled storage offerings provide a
flexible way to implement a Storage Area Network over an Ethernet network. See 2.6.4,
“iSCSI” on page 36 for additional information about iSCSI.
2.9.3 IBM TotalStorage DS4000 series
The IBM TotalStorage DS4000™ line of Fibre Channel enabled Storage offerings provides a
wide range of storage solutions for your Storage Area Network. The IBM TotalStorage
DS4000 Storage server family consists of the following models: DS4100, DS4300, DS4500,
and DS4800. The Model DS4100 Express Model is the smallest model and scales up to
44.8 TB; the Model DS4800 is the largest and scales up to 89.6 TB of disk storage at the time
of this writing. Model DS4300 provides up to 16 bootable partitions, or 64 bootable partitions
if the turbo option is selected, that are attached with the Gigabit Fibre Channel Adapter
(FC 1977). Model DS4500 provides up to 64 bootable partitions. Model DS4800 provides
4 GB switched interfaces. In most cases, both the IBM TotalStorage DS4000 family and the
IBM System p5 servers are connected to a storage area network (SAN). If only space for the
rootvg is needed, the Model DS4100 is a good solution.
For support of additional features and for further information about the IBM TotalStorage
DS4000 Storage Server family, refer to the following Web site:
http://www.ibm.com/servers/storage/disk/ds4000/index.html
2.9.4 IBM TotalStorage DS6000 and DS8000 series
The IBM TotalStorage Models DS6000™ and DS8000™ series are the high-end premier
storage solution for use in storage area networks and use a POWER5 technology-based
design to provide fast and efficient serving of data. The IBM TotalStorage DS6000 provides
enterprise class capabilities in a space-efficient modular package. It scales to 67.2 TB of
physical storage capacity by adding storage expansion enclosures. The Model DS8000 series
is the flagship of the IBM TotalStorage DS family. The DS8000 scales to 192 TB. The DS8000
system architecture is designed to scale to over one petabyte. The Model DS6000 and
DS8000 systems can also be used to provide disk space for booting LPARs or partitions
using Micro-Partitioning technology. DS6000 and DS8000 disk subsystems are usually
connected to IBM System p5 servers using a storage area network.