Hp StorageWorks XP Remote Web Console Software Bedienungsanleitung PDF herunterladen (Seite 93)

could not change the URz pair status to Duplex and could not reverse the copy direction,

please use Business Continuity Manager to execute the YKRESYNC REVERSE command onto the

journal groups that will make a URz pair between the intermediate site and the secondary

site. YKRESYNC is a command for re-establishing a pair.

3. Wait until the status of the URz pair changes to Duplex.

4. Use Business Continuity Manager to execute the YKSUSPND REVERSE command onto the

journalgroupsthatwillmakeaURzpairbetween theintermediatesiteand thesecondary site.

YKSUSPND is a command for splitting a pair and stopping the copy operation temporarily.

5. Wait until the status of the URz pair changes to Suspend.

6. If the TCz Synchronous volume is not in Simplex status, use Business Continuity Manager to

execute the YKDELETE command onto the TCz Synchronous pair, and then wait until the status

changes to Simplex. YKDELETE is a command for releasing a pair.

If the TCz Synchronous volume is in Simplex status, use Business Continuity Manager to execute the

YKMAKE REVERSE command onto the TCz Synchronous pair that exists between the primary site and

the intermediate site. YKMAKE is a command for establishing a pair.

7. Use Business Continuity Manager to execute the YKSUSPND FORWARD command onto the TCz

Synchronous pair that exists between the primary site and the intermediate site.

8. Use Business Continuity Manager to execute the YKDELETE command onto the TCz Synchronous

pair that exists between the primary site and the intermediate site.

9. Use volumes in the primary site to resume your business tasks.

10. Execute the YKDELETE command onto journal groups that will make a URz pair between the

intermediate site and the secondary site.

The system returns to the status before the 3DC cascading conﬁguration was set up.

For detailed information about Business Continuity Manager usage and copy statuses, please refer

to Business Continuity Manager User’s Guide.

Combining URz with TCz Synchronous (3DC Multi-target Conﬁguration)

The XP storage system provides the function to combine URz and TCz Synchronous. In a system where

URz and TCz Synchronous are combined, there are one primary site and two secondary sites. One of

the secondary sites is for synchronous remote copy, and is usually located at a short distance from

the pri

mary site. The other secondary site is for asynchronous remote copy, and is usually located at

a long distance from the primary site. Such a system conﬁguration is called three data center (3DC)

multi-target conﬁguration.

3DC multi-target conﬁguration provides solution for disaster recovery and business continuity. Even when

a disaster or failure occurs at two sites at the same time, you can restart your business tasks by using

data in the remaining secondary site.

The ﬁgure below illustrates a 3DC multi-target conﬁguration where URz and TCz Synchronous are

combined. In this conﬁguration, there are three sites as follows:

• Prim

arysitefor both TCzSynchronous andURz

• Secondarysitefor TCzSynchronous

• Secondary site for URz

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