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Chapter 1. Introduction to the DS8000 series 7
Storage Hardware Management Console (S-HMC) for the DS8000
The DS8000 offers a new integrated management console. This console is the service and
configuration portal for up to eight DS8000s in the future. Initially there will be one
management console for one DS8000 storage subsystem. The S-HMC is the focal point for
configuration and Copy Services management, which can be done by the integrated
keyboard display or remotely via a Web browser.
For more information on all of the internal components see Chapter 2, “Components” on
page 19.
1.2.2 Storage capacity
The physical capacity for the DS8000 is purchased via disk drive sets. A disk drive set
contains sixteen identical disk drives, which have the same capacity and the same revolution
per minute (RPM). Disk drive sets are available in:
73 GB (15,000 RPM)
146 GB (10,000 RPM)
300 GB (10,000 RPM)
For additional flexibility, feature conversions are available to exchange existing disk drive sets
when purchasing new disk drive sets with higher capacity, or higher speed disk drives.
In the first frame, there is space for a maximum of 128 disk drive modules (DDMs) and every
expansion frame can contain 256 DDMs. Thus there is, at the moment, a maximum limit of
640 DDMs, which in combination with the 300 GB drives gives a maximum capacity of
192 TB.
The DS8000 can be configured as RAID-5, RAID-10, or a combination of both. As a
price/performance leader, RAID-5 offers excellent performance for many customer
applications, while RAID-10 can offer better performance for selected applications.
Price, performance, and capacity can further be optimized to help meet specific application
and business requirements through the intermix of 73 GB (15K RPM), 146 GB (10K RPM) or
300 GB (10K RPM) drives.
IBM Standby Capacity on Demand offering for the DS8000
Standby Capacity on Demand (Standby CoD) provides standby on-demand storage for the
DS8000 and allows you to access the extra storage capacity whenever the need arises. With
Standby CoD, IBM installs up to 64 drives (in increments of 16) in your DS8000. At any time,
you can logically configure your Standby CoD capacity for use. It is a non-disruptive activity
that does not require intervention from IBM. Upon logical configuration, you will be charged
for the capacity.
For more information about capacity planning see 9.4, “Capacity planning” on page 174.
1.2.3 Storage system logical partitions (LPARs)
The DS8000 series provides storage system LPARs as a first in the industry. This means that
you can run two completely segregated, independent, virtual storage images with differing
Note: Initially the intermixing of DDMs in one frame is not supported. At the present time it
is only possible to have an intermix of DDMs between two frames, but this limitation will be
removed in the future.