NEC IS015-9E User Manual

Chapter 1 Data Replication Overview

The procedure for backup from a replication volume is described below.

(1) During operation, the master volume (MV) and replication volume (RV) are connected.

(2) Suspend the production task and separate the replication volume (RV). Resume the task after

separation is complete.

(3) Use the separated replication volume (RV) to perform backup and the task in parallel. After

backup is complete, reconnect the replication volume (RV) (Reconnection takes only a short time

because only updated parts in the master volume are reflected to the replication volume (RV)).

[Using the Replication Volume as Disk Backup]

In this method, the replication volume is used as backup of the master volume. In this case, you do

not have to manage the existing magnetic tapes because they are not used as storage media.

When the restoration instruction is complete, you can use the backup data even if the actual data

replication has not been completed. If data to be accessed is not restored to the master volume, the

data in the replication volume is accessed. The user does not have to be aware of using which of the

master volume or replication volume.

This reduces the data restoration time substantially.

Figure 1-3 Using Replication Volume as Backup

The procedure for using a replication volume for backup is described below.

(1) Connect the replication volume 1 (RV1) to the master volume.

(2) Suspend the production task and separate the replication volume 1 (RV1). Resume the task after

connecting the replication volume 2 (RV2).

(3) After that, use the replication volume 1 (RV1) and replication volume 2 (RV2) alternately to

perform backup.

Master

(MV)

Replication 1

(RV1)

Replication 2

(RV2)

Separate

Connect