IBM System Storage Subsystem DS5020 - Manual (Page 31)

Chapter 1. Introduction
This chapter describes the operating specifications, features, and components for
the IBM System Storage DS5020 Storage Subsystem (hereafter referred to as
DS5020 or storage subsystem).
This chapter also includes an inventory checklist and important information about
best practices guidelines and product updates for your DS5020.
Overview
The IBM System Storage DS5020 storage subsystem (Machine Type 1814-20A) is
designed to provide solutions to meet the needs of midrange/departmental storage
requirements, delivering high performance, advanced function, high availability,
modular and scalable storage capacity, with SAN-attached 8 Gbps Fibre Channel
(FC) and 1 Gbps iSCSI connectivity, and support for RAID levels 0, 1, 3, 5, and 6
up to over 49 terabytes (TB) when using 450 GB Fibre Channel hard drives and up
to 112 TB when using 1 TB Serial Advanced Technology Attachment (SATA)
Enhanced Disk Drive Modules (E-DDMs).
A 3U rack-mountable enclosure houses the DS5020 redundant, dual-active RAID
controllers with either four Fibre Channel ports, four Fibre Channel ports, or two
Fibre Channel and two iSCSI ports per controller. The DS5020 can be configured
for the attachment of host servers and EXP520 and EXP810 storage expansion
enclosures and up to 16 4 Gbps Fibre Channel or SATA E-DDMs. The base
DS5020 storage subsystem controllers each have four Fibre Channel ports.
The DS5020 supports the attachment of up to six EXP520 and EXP810 storage
expansion enclosures, resulting in the capability to connect up to 112 E-DDMs and
enabling storage configurations of over 49 TB using 450 GB Fibre Channel E-DDMs
or 112 TB using 1 TB SATA E-DDMs.
The base DS5020 storage subsystem supports up to 32 drives, which includes 16
drives in the DS5020 chassis and 16 more drives in an attached storage expansion
enclosure. To attach more than 32 drives, you much purchase the applicable
feature option.
To attach additional drives to the DS5020, you can use EXP520 or EXP810 storage
expansion enclosures. You can connect EXP520 storage expansion enclosures to
the DS5020 without purchasing feature options. To attach an EXP810 storage
expansion enclosure or enclosures to the DS5020, you must purchase the Attach
EXP810 to DS5020 Activation feature option. Contact your IBM marketing
representative or IBM reseller for more information.
To connect 33 - 64 drives in one DS5020 and three EXP520 storage expansion
enclosures, you must purchase the DS5020 Drive Attach 33 - 64 feature option. If
you need to connect 65 - 112 drives in a DS5020 configuration, you must purchase
the DS5020 Drive Attach 65- 112 feature option in addition to the DS5020 Drive
Attach 33 - 64 feature option. These two feature options enable you to attach the
additional drives in one DS5020 and six EXP520 storage expansion enclosures.
Contact your IBM marketing representative or IBM reseller for more information.
The DS5020 supports configurations of FC disks with or without Full Disk
Encryption (FDE), or SATA disks, or a mix of disk drives. To install FDE disks in a
DS5020, you must purchase the Full Disk Encryption option. Advanced DS5020
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