Hitachi AMS 2100, Hardware Manual

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Introduction
Hitachi AMS 2100/2300 Storage System Hardware Guide
Copy solution features and functions
The AMS 2100/2300 supports several copy solutions as described in the
following table.
Performance management features and functions
The AMS 2100/2300 supports several performance functions as described
in Table 1-14 .
Table 1-13: Copy Solution Features and Function
Feature Description
TrueCopy Remote
Replication The TrueCopy remote replication function continuously
synchronizes the data on two arrays connected by a Fibre
Channel interface, ensuring that both arrays always contain
the same data.
In addition, this function significantly improves copying
speed by transferring only differential data.
TrueCopy Extended
Distance The TrueCopy Extended Distance (TCED) function.
continuously synchronizes the data on two arrays connected
by a Fibre Channel interface, ensuring that both arrays
always contain the same data. TCED also increases copying
speed by transferring only differential data.
ShadowImage In-
System Replication The ShadowImage in-system replication function controls
logical unit copying done within one and the same array.
It can create a copy (secondary volume) of a logical unit
within one and the same array keeping the redundancy that
the source logical unit (primary volume) has.
Copy-on-write
SnapShot The Copy-on-write SnapShot feature enables you to maintain
a logical copy of logical units (volumes) at a point in time
within the same disk array system.
Modular Volume
Migration The Modular Volume Migration function migrates the logical
unit which receives the host operation to another RAID group
within a disk array system.
Table 1-14: Performance Management Features and Functions
Feature Description
Performance Monitor
Function This function acquires information on performance of RAID
groups and logical units, etc. in the array, and utilization rates
of resources such as hard disk drives and processors. The
information acquired is displayed with line graphs.
Cache Partition
Manager Function This function enhances system performance by cache area
division, segment size specification, and assignment for
separate logical units.