Hitachi Universal Replicator

2

Requirements and specifications

This chapter provides system requirements for Hitachi Universal Replicator.

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System requirements

Requirements and specifications

Hitachi Virtual Storage Platform Hitachi Universal Replicator User Guide

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System requirements

Universal Replicator operations are performed from the primary system to the secondary system, which contain the UR P-VOLs, S-VOLs, and master and restore journal volumes. Copy operations are carried out via the data path.

General requirements for these and all UR components are listed below.

Table 2-1 General system requirements

Item Requirement

Number of VSP systems Two—one at the local site, one at the remote site.

A maximum of four VSP systems can be used at each site, and any combination — from one to four storage systems on one or both sites — can be used:

Storage systems at primary and secondary sites

VSP is required at the primary or secondary site. Any of the following can be paired with it:

• VSP (70-01-01-xx/xx or later)

• VSP G1000 (80-01-01-xx/xx or later)

• USP V/VM (60-07-51-xx/xx or later)

• TagmaStore USP/TagmaStore NSC (50-09-98-xx/xx or later)

• HUS VM (73-01-31-xx/xx or later)

Previous model storage systems supported

Universal Replicator

See previous item; see also Planning for previous models on page 3-16 .

• Must be installed on primary and secondary VSP systems.

• License keys required.

• UR and URz can coexist in the same storage system.

• For licensing capacity requirements when UR volumes are shared with other VSP software volumes, see

Dynamic Provisioning on page B-5

• For information on expired licenses or exceeding licensed capacity, see the Hitachi Storage Navigator User

Guide.

Other licenses required TrueCopy is required. This applies whether or not TC volumes are shared with UR.

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Interfaces • Storage

Must be LAN-attached to the primary system.

Not required on the secondary system, but recommended in order to change UR parameters and access the S-VOL for disaster recovery and maintenance.

The following roles are required:

Storage Administrator (Remote Copy), to perform pair operations

Storage Administrator (System Resource

Management), to configure settings

• CCI:

Optional

Command device required

Supported host platforms

Data path

Refer to the Hitachi Data Systems interoperability matrix at http://www.hds.com/products/interoperability .

Fibre channel with either direct and switch connections.

When the system is connected to a VSP or VSP G1000, you can use multiple path groups. This is done by registering path groups with multiple path group IDs in the same storage system. But note that only one path group can be specified for a mirror. Up to eight paths can be registered in one path group.

Path group Groups of logical paths, which allows you to configure or change the configuration of multiple paths at the same time.

• A maximum of eight logical paths can be registered in a path group

• A maximum of 64 path groups can be set in a storage system.

• The following Hexadecimal values can be set as the path group ID:

0-255 when connected to VSP or VSP G1000

0 only when connected to USP V/VM, HUS VM,

TagmaStore USP, or TagmaStore NSC

• For a mirror, the same path group ID must be used to connect the primary storage system to the secondary system as is used to connect the systems in the reverse direction.

• The path group is specified during the create pair operation. It cannot be changed by the resync pair or swap operation.

• Path groups can be created and specified using CCI. See configuration setting commands in Command Control

Interface User and Reference Guide and sample configuration definition files in Command Control

Interface Installation and Configuration Guide.

• It is recommended that you specify different paths and path groups for TC and UR secondary systems when using CU Free.



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Volumes • A P-VOL may be copied to one S-VOL.

• P-VOL and S-VOL must be equal in size.

• P-VOL and S-VOL must be of same emulation type.

• The maximum volume size of P-VOL and S-VOL is

4,194,304.000 MB (8,589,934,592 blocks). However, when TagmaStore USP or TagmaStore NSC is used as the primary or secondary system, the maximum volume size is 2,949,120.00 MB (6,039,797,760 blocks).

• The minimum volume size of P-VOL and S-VOL is

26.875MB (96,000 blocks).

• When TC is cascaded with UR, a data volume may be copied to multiple data centers.

Maximum number of pairs

Limited per VSP system. See

Maximum number of pairs allowed on page 3-8

.

Supported RAID groups • RAID1, RAID5, and RAID6 are supported for both data and journal volumes.

• RAID1, RAID5, and RAID6 can co-exist in the same journal.

Supported volume types Virtual LUN:

• Can be used for data and journal volumes.

• S-VOL capacity must equal P-VOL capacity.

Cache Residency Manager:

• Data volume: yes

• Journal volume: no

LUN Expansion (LUSE)

Cache and nonvolatile storage (NVS)

Must be operable for primary and secondary systems to ensure pair creation success. The remote system cache must be configured to adequately support UR remote-copy workloads, as well as local workload activity. In general, increase cache capacity by 25 percent for UR. Also, 1 GB should be added for each journal on the system.

Note: When pair status is COPY, neither cache nor shared memory can be added to or removed from the system. When either of these tasks is to be performed, first split any pairs in COPY, status, then resynchronize when the cache or shared memory operation is completed.

Host failover software

CCI consistency groups when multiple primary and secondary system

Required for disaster recovery.

• Up to two mirrors can be registered in one journal. One consistency group can be registered in each mirror. If there are four systems, you must create one journal for each system.

• Up to 8,192 pairs. You can register the total number of pairs in the journals within one CCI consistency group.

However, it is recommended that you register only up to

4,096 pairs.

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Journals


• Max. number: 256 (0 to 255) per storage system

• Recommended number per storage system: Up to 16

• Max. number of journal volumes: 64 per journal

• Max. number of data volumes: 8,192 per journal

See Planning journal volumes on page 3-7

for all requirements and restrictions.



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Hitachi Universal Replicator

Requirements and specifications

System requirements

Table 2-1 General system requirements

Related manuals

Table of contents

Hitachi Universal Replicator

Requirements and specifications

System requirements

Table 2-1 General system requirements

Related manuals

Hitachi

MK-97DF8018-00

Table of contents