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Chapter 1. Introduction
This chapter describes the operating specifications, features, and components for the IBM System Storage DS4700 Express Storage Subsystem (hereafter referred to as DS4700 or storage subsystem).
This chapter also includes an inventory checklist and important information on best practices guidelines and product updates for your DS4700 Express.
Overview
IBM DS4000 solutions support the large and growing data storage requirements of business-critical applications. These scalable IBM DS4000 solutions offer you data access and protection to meet your existing enterprise storage requirements and prepare for the future.
The IBM System Storage DS4700 Express Storage Subsystem (Machine Type 1814, Models 70A, 70H, 70S, 70T, 72A, 72H, 72S, and 72T) 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 4-Gbps Fibre Channel (FC)
connectivity, and support for RAID levels 0, 1, 3, 5, and 6 up to over 33 terabytes (TB) when using 300 GB hard drives and up to 56 TB when using 500 GB SATA Enhanced Disk Drive Modules (E-DDMs).
A 3-U rack-mountable enclosure houses the DS4700 Express redundant, dual-active RAID controllers with up to six fibre-channel ports per controller for attachment of host servers and DS4000 storage expansion enclosures and up to 16 4-Gbps fibre channel or SATA E-DDMs.
The DS4700 Express supports attachment of up to six EXP810, EXP710, or EXP100 storage expansion enclosures, resulting in the capability to connect up to 112 disk drives and enabling storage configurations of over 33 TB using 300 GB fibre channel E-DDMs or 56 TB using 500 GB SATA E-DDMs. The DS4700 Express supports configurations of FC or Serial Advanced Technology Attachment (SATA) disks, or a mix of both types of disk drives by use of the optional DS4700 Express Fibre Channel/SATA Enclosure Intermix feature. Advanced DS4000 storage management, copy service options, and optional advanced disaster recovery
functions are available for the DS4700 Express, including FlashCopy®, VolumeCopy, and Enhanced Remote Mirroring.
The DS4700 Express supports up to four hosts in a redundant direct-attached fibre channel configuration. When using fibre channel switches, you can redundantly connect up to 512 hosts to the DS4700 Express.
Depending on the model, the DS4700 Express Storage Subsystems are shipped with either ac or dc (-48V dc) power supply and fan unit CRUs. In addition, an DS4700 Express Telco bezel assembly with an integrated air filter can also be purchased for the operating environments that require it.
The DS4700 Express Storage Subsystem with dc power supply and fan units (1814-70/2S&T) supports both NEBS level 3/Telco operating environments and standard Information Technology (IT) and office environments. However, not all DS4700 Express models with ac power supplies (1814-70/2A&H) support both NEBS level 3/Telco operating environments and standard IT and office
environments. DS4700 Express Storage Subsystems that shipped before the introduction of the DS4700 Express models with dc power supply and fan units support standard IT and office operating environments only. You can identify whether a DS4700 Express Storage Subsystem is NEBS/Telco compliant by checking the serial number. Any DS4700 Express Storage Subsystem with serial numbers starting at 138500A and higher are NEBS level 3/Telco compliant.
The DS4000 Storage Manager client is also available for the DS4700 Express. This storage management software is designed to help centralize storage management, help simplify partitioning of the DS4000 storage subsystem, and strategically allocate storage capacity to maximize storage space.
Models
The following DS4700 Express RAID controller cache size, partitions, and other features vary depending the DS4700 Express model:
v Model 70H comes with 1 GB cache per controller, two host ports per controller, and two storage partitions premium feature, which you can upgrade. Model 70H can also be upgraded to support Copy Services premium features such as FlashCopy, VolumeCopy and Enhanced Remote Mirroring when you purchase those additional Copy Services premium feature options. Model 70H also includes the Windows Host kit as standard. Model 70H does not come with DS4000 drive expansion enclosure attachment entitlements. You can purchase 1 to 3 drive expansion and 4 to 6 drive expansion enclosures attachment
entitlements to connect up to six enclosures. Model 70H comes with ac power supply and fan units.
v Model 70A is the same as Model 70H except that you can select to upgrade partitions when placing the order. You can also select a supported host kit.
v Model 70S is the same as Model 70A except that it has dc power supply and fan units instead of ac power supply and fan units.
v Model 70T is the same as Model 70H except that it has dc power supply and fan units instead of ac power supply and fan units.
v Model 72H comes with 2 GB cache per controller, four host ports per controller, and eight storage partitions premium feature, which you can upgrade when you purchase storage partitioning upgrades. Model 72H can also be upgraded to support Copy Services premium features such as FlashCopy, VolumeCopy and Enhanced Remote Mirroring when you purchase those additional Copy Services premium feature options. Model 72H also includes the Windows Host kit as standard. Model 72H comes with 1 to 3 DS4000 drive expansion enclosure attachment entitlements. You can upgrade to 4 to 6 drive expansion enclosures attachment entitlements.
v Model 72A is the same as Model 72H except that you can select to upgrade partitions when placing the order. You can also select a supported host kit. Model 72A comes with ac power supply and fan units.
v Model 72S is the same as Model 72A except that it comes with dc power supply and fan units instead of ac power supply and fan units.
v Model 72T is the same as Model 72H except that it comes with dc power supply and fan units instead of ac power supply and fan units.
Contact your IBM sales representatives or reseller for more information on the various DS4700 Express models and options.