EMC CX500I Configuration Guide - Page 76

Local High Availability, Bidirectional Mirroring, Integration with EMC SnapView Software

Get EMC CX500I - Insignia CLARiiON NAS Server PDF manuals and user guides View all EMC CX500I manuals
Add to My Manuals
Save this manual to your list of manuals

Page 76 highlights

Data Replication and Data Mobility Software Local High Availability MirrorView operates in a highly available environment. Each host has two host bus adapters (HBAs) and each storage system has two SPs. If a single adapter or SP fails, the path in the surviving SP can take control of (trespass) any LUNs owned by the failed adapter or SP. The high-availability features of RAID protect against disk failure. Mirrors are resilient to an SP failure in the primary or secondary storage system. Bidirectional Mirroring The primary or secondary role applies to just one remote mirror. A storage system can maintain the primary image for one mirror and a secondary image for another mirror. This allows the use of server resources at both sites while maintaining duplicate copies of all data at both sites. Integration with EMC SnapView Software EMC SnapView software allows users to create up to eight snapshot copies of an active LUN at any point in time. Each snapshot copy is a consistent image that can serve as backup while I/O continues to the original LUN. You can use SnapView in conjunction with MirrorView to make backup copies at a remote site. A common situation for disaster recovery is to have a primary and a secondary site that are geographically separate. MirrorView ensures that the data from the primary site replicates to the secondary site. The secondary site sits idle until there is a failure of the primary site. With the addition of SnapView at the secondary site, the secondary site can take snapshot copies of the replicated images and back them up to other media, providing time-of-day snapshots of data on the production host with minimal overhead. 4-14 EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
4-14
EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide
Data Replication and Data Mobility Software
Local High Availability
MirrorView operates in a highly available environment. Each host
has two host bus adapters (HBAs) and each storage system has two
SPs. If a single adapter or SP fails, the path in the surviving SP can
take control of (
trespass
) any LUNs owned by the failed adapter or SP.
The high-availability features of RAID protect against disk failure.
Mirrors are resilient to an SP failure in the primary or secondary
storage system.
Bidirectional Mirroring
The primary or secondary role applies to just one remote mirror. A
storage system can maintain the primary image for one mirror and a
secondary image for another mirror. This allows the use of server
resources at both sites while maintaining duplicate copies of all data
at both sites.
Integration with EMC SnapView Software
EMC SnapView software allows users to create up to eight snapshot
copies of an active LUN at any point in time. Each snapshot copy is a
consistent image that can serve as backup while I/O continues to the
original LUN. You can use SnapView in conjunction with MirrorView
to make backup copies at a remote site.
A common situation for disaster recovery is to have a primary and a
secondary site that are geographically separate. MirrorView ensures
that the data from the primary site replicates to the secondary site.
The secondary site sits idle until there is a failure of the primary site.
With the addition of SnapView at the secondary site, the secondary
site can take snapshot copies of the replicated images and back them
up to other media, providing time-of-day snapshots of data on the
production host with minimal overhead.