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capability allows IT organizations to
strategically allocate storage capacity,
helping to optimize the utilization of
storage space and helping reduce
hardware and storage management
costs. Instead of purchasing multiple
RAID controllers with their own dedi-
cated disks and management, organi-
zations can attach multiple servers to
one central system—the DS4200—
which is designed to provide hardware
failover with dual controllers and com-
mon management.
Other DS4200 features that can help
enhance data management and protec-
tion include FlashCopy, Dynamic
Volume Expansion, VolumeCopy and
Enhanced Remote Mirroring.
The FlashCopy feature is designed to
take point-in-time copies of logical vol-
umes, which may be used for file
restoration, backups, application testing
or data mining.
Dynamic Volume Expansion is designed
to allow administrators to resize logical
volumes without disrupting users. This
feature can work well for applications
with rapidly growing data requirements,
such as IBM Lotus Notes® and
Microsoft® Exchange.
The VolumeCopy feature is designed to
provide full replication of one logical vol-
ume (source) to another (target) within
the DS4200. VolumeCopy is designed
to allow read-only access to the source
volume during the copy process and
suspend writes to support point-in-time
integrity.
Enhanced Remote Mirror consists of
Global Mirror with Asynchronous
Write-order Consistency, which is criti-
cal for mirroring multi-LUN applications,
Global Copy with Asynchronous and
Metro Mirror with Synchronous.
Multiple DS4200s can use a common
pool of hot-spare disk drives as a cost-
effective way to help improve availabil-
ity, even if the DS4200s are attached to
different servers. IT administrators can
determine the number of drives to allo-
cate as spares.
Additional tools to help manage storage
The DS4200 is supported by a variety
of IBM Tivoli® software products,
including IBM Tivoli Storage Manager
and IBM Tivoli Storage Resource
Manager, as well as many other third-
party hardware and software products.
DS4000 Storage Manager is designed
to allow administrators to quickly con-
figure and monitor storage from a
Java™ technology-based Web browser
interface. It is also designed to allow
them to customize and change settings
as well as configure new volumes,
define mappings, handle some routine
maintenance operations and dynami-
cally add new enclosures and capacity
to existing volumes—without interrupt-
ing user access to data. Failover driv-
ers, performance-tuning routines and
cluster support are also standard fea-
tures of the DS4000 Storage Manager.
By providing these features and an intu-
itive user interface, the DS4000 Storage
Manager is designed to help reduce the
complexity of storage management and
the amount of time spent managing
storage.
Enhanced storage management
capabilities
The IBM System Storage DS4200 has
several features designed to improve
data management and storage system
performance. The DS4000 Storage
Manager software is designed to allow
administrators to partition the DS4200
into as many as 64 virtual servers. This