Chapter 4. IBM TotalStorage and ESS 39
most significant facets of the Seascape architecture strategy is the use of server technology
within the storage system. The integration of actual server computers (SMPs) into the ESS
helps reduce the need for expensive custom components, and also increases reliability
through the use of proven server and operating system technologies.
The diagram in Figure 4-2
depicts an ESS Model 800, and all of its major components. At the
top of the frame are the disk drives modules (DDMs), and immediately under them are the
processor drawers that hold the cluster symmetrical multiprocessors (SMPs). Just below the
processor drawers are the I/O drawers that hold the SSA device adapters that connect the
SSA loops. Just below the I/O drawers are the host adapter bays that hold the host adapters.
At the bottom of the frame are the AC power supplies and batteries.
Between the two cages of DDMs is an operator panel that includes an emergency power
switch, local power switch, power indicator lights, and message/error indicator lights.
For larger configurations, the ESS base enclosure attaches to an Expansion Enclosure rack
that is the same size as the base ESS, and stands next to the ESS base frame.
Figure 4-2 ESS Model 800 major components
4.3.2 ESS features and benefits
The ESS set a new standard for storage servers back in 1999 when it was first available, and
since then it has evolved into the third-generation ESS Model 800. The IBM TotalStorage
Enterprise Storage Server Model 800 introduces important changes that dramatically improve
the overall value of the ESS and provide a strong base for strategic Storage Area Network
SMP Processors and
SSA Device Adapters
Cages and disk drives
Main Power Supplies
40 Linux with zSeries and ESS - Essentials
The ESS attachment versatility and large capacity enable data from different platforms to be
consolidated onto a single high performance, high availability box. Storage consolidation can
be the first step towards server consolidation, reducing the number of boxes you have to
manage, and allowing you to flexibly add or assign capacity when needed. The IBM
TotalStorage Enterprise Storage Server supports all the major operating systems platforms,
from the complete set of IBM series of e-business servers and IBM NUMA-Q®, to
the non-IBM Intel-based servers, and the different variations of UNIX, including Linux, as
shown in Figure 4-3.
Figure 4-3 IBM TotalStorage Enterprise Storage Server for storage consolidation
With a total capacity of up to 55 TB, and a diversified host attachment capability, SCSI,
ESCON®, and Fibre Channel/FICON™ (the ESS Model 800) provide outstanding
performance while consolidating the storage demands of the heterogeneous set of server
platforms that must be dealt with nowadays.
Key features that characterize the performance enhancements of the ESS Model 800 are:
The ESS Model 800, with the optional Turbo feature for the SMP processors, is capable of
delivering 2.5 times the throughput of its predecessor Model F20.
64 Gb cache supports much larger system configurations and increases hit ratios, driving
down response times.
Double the internal bandwidth provides high sequential throughput for digital media,
business intelligence, data warehousing, and life science application.
eServer zSeries 900
IBM 7133 Serial Disk
Remote mnagement with
IBM TotalStorage ESS Specialist
IBM TotalStorage ESS Expert