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For instructions on formatting volumes, please refer to the Virtual LVI/LUN and Volume Shredder
User’s Guide. The volume does not need to be formatted in order to register the deleted volume
as a journal volume again.
• Access from hosts to journal volumes:
If a path is definedfromahost to avolume, youcannotregisterthe volume as ajournal volume.
You cannot define paths from hosts to journal volumes. This means that hosts cannot read from
and write to journal volumes.
Journal Volume Areas
The journal volume consists of the metadata area and the journal data area. The ratio of metadata area
to journal dat
a area is common in the journal volumes within the journal group.
In the metada
ta area, the metadata that manages the journal data is stored. For further information on
the metadata area, see Table 3 on page 37. The journal data that the metadata manages is stored in
the journal data area.
If the metada
ta or the journal data cannot be stored for a given length of time because the metadata
or journal da
ta areas have become full with the metadata or the journal data that had not been
discarded, the pair is suspended according to a failure. Users can use an XP Remote Web Console
computer to specify this timeout period (Data overflow watch) as a journal group option. This timeout
period must be within the range of 0 to 600 seconds. For details on journal group options, see
“Changing Options for a Journal Group”onpage138.
Remote Copy Connections
The remote copy connections are the physical paths used by the primary storage systems to communicate
with the secondary storage systems. Remote copy connections enable communication between the
primary and secondary storage systems. The primary storage systems and secondary storage systems
are connected via fibre-channel interface cables. You must establish paths from the primary to the
secondary storage system, and also from the secondary to the primary storage system. Up to eight paths
can be established in both of these directions.
When fibre-channel interface (optical multimode shortwave) connections are used, two switches are
required for distances greater than 0.5 km (1,640 feet), and distances up to 1.5 km (4,920 feet, 0.93
miles) are supported. If the distance between the primary and secondary sites is greater than 1.5 km,
the optical single mode long wave interface connections are required. When fibre-channel interface
(single-mode long wave) connections are used, two switches are required for distances greater than 10
km (6.2 miles), and distances up to 30 km (18.6 miles) are supported.
See “Setting up Remote Copy Connections” on page 65 for further information on installing and
configuring the FC remote copy connections.
The URz remote copy configuration between primary storage system and secondary storage system has
the following requirements:
URz supports 1-to-1 remote copy connection in one journal group pair. In one journal group pair, one
primary storage system can be connected to only one secondary storage system. This confi guration
ensures the backup data consistency of two or more volumes (e.g., large databases) within the same
storage system.
HP strongly recommends that you establish at least two independent remote copy connections from the
primary storage system to the secondary storage system and vice versa to provide hardware redundancy
for this critical communications path.
Initiator Ports and RCU Target Ports
Th
e initiator port and the RCU target port are required at both the primary storage system and secondary
storagesystem. Theinitiator port at theprimary storagesystemisconnected to theRCU target port
at the secondary storage system via the fibre channel interface. The initiator port at the secondary
storage system is connected to the RCU target port at the primary storage system. The initiator port at the
28
Overview of Universal Replicator Operations
- SVS 200 1
- Contents 3
- Figures 8
- About this Guide 13
- Document Conven 14
- Getting Help 15
- Benefits 18
- Business Solutions 18
- Hitachi Shad 19
- Journal Obtain 22
- Journal Copy 22
- Journal Restore 22
- URz Components 23
- Main and Remote C 25
- Journal Group 25
- Data Volume Pair 26
- Journal Volume 26
- Remote Copy Connections 28
- URzRemoteConsole Software 29
- Host I/O 29
- Time-Stamping Function 29
- Remote Copy Operations 30
- Update Co 31
- Journal Group Operations 31
- Logical DKC (LDKC) 33
- Update Copy Operation 35
- Journal Processing 36
- Creating and S 37
- Storing Journa 38
- Types of Journal 39
- URz Delta Resync Operation 40
- Journal Obta 41
- URz Pair Status 45
- Pair Status Description 47
- Suspend Types 48
- URz Suspension Condition 50
- Command Device 53
- System Requirements 55
- Disk Track Format 56
- Logical Volume Types 57
- The Maximum Number of Pairs 59
- Installing the Hardware 64
- Enabling the URz Option(s) 66
- Planning of Journal Volumes 67
- Journal Volume C 69
- DKC Journal Transfer Speed 70
- System for Remote Console 72
- Basic Behavior 73
- Storage Systems are Used) 74
- Extended Consistency Groups 74
- Systems 77
- Disaster Recov 78
- Combining URz w 79
- Combining 81
- Figure 25 Res 85
- Using At-T 87
- Business Continuity Manager 88
- Hardware Configuration 91
- Setup Procedure 92
- Configuration) 100
- Operation Window 107
- Displaying Info 111
- Configuring Port Attributes 112
- Changing Option 116
- Adding Logical Paths 117
- Deleting Logical Paths 118
- Viewing the St 119
- Removing 121
- Secondar 121
- 5 Using Journal Groups 123
- Using Journal Groups 124
- Caution: 128
- Cautions: 132
- Deleting a Journal Group 141
- Splitting a 142
- Consistency Group 145
- Saving Pair S 154
- Displayin 159
- 7 Monitoring Remote Copy 171
- Operations 171
- Statistic Description 174
- 8Viewing HistoryofDataVolume 175
- Pair Operations 175
- Displaying th 181
- Clearing SIMs 183
- Displaying a L 190
- A master journal group 191
- A restore journal group 191
- Switching Opera 198
- 12 Troubleshooting 201
- Path Status 203
- Troubleshooting 208
- 13 Power Management for Disk 209
- Storage Systems and Network 209
- Relay Devices 209
- Volumes 213
- 15 SIM Reporting 215
- Acronyms and Abbreviations 218
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