Product Overview 39
Product Over
view
Figure 12
Virtual Data Storage
Redundancy Groups
Array physical capacity is divided into Redundancy Groups. A Redundancy
Group (RG) can be thought of as an independent array. Each RG has its own
set of disks, active hot spare, and controller. LUNs are created from capacity
within a single RG. LUNs can be accessed simultaneously through either
controller.
Multiple redundancy groups provide the following benefits:
■
Fault isolation. Because each redundancy group has its own resources, a
disk failure in one RG will not impact the other RG. This effectively
increases the data availability of the array.
■
Performance management. Applications can be assigned to different RGs,
thus isolating their performance impact on each other.
■
Greater configurability. Each RG can be constructed from different classes
of disks. As an example, one RG could be constructed from a few, small,
Host
LUN 1
LUN 2
Cache
Maps
Storage
Pool
Summary of Contents for StorageWorks 7110 - Virtual Array
Page 12: ...12 Contents ...
Page 54: ...54 Product Overview Figure 21 VA 7110 I O Architecture ...
Page 90: ...90 Troubleshooting ...
Page 116: ...116 Servicing Upgrading Figure 45 Removing Installing an Array Controller Filler Panel 1 2 3 ...
Page 129: ...Servicing Upgrading 129 Servicing Upgrading Figure 52 Removing and Installing an LCC 1 2 3 ...
Page 130: ...130 Servicing Upgrading Figure 53 Setting the FC Loop Speed Switch Must be set to 1GB s ...
Page 149: ...Specifications Regulatory Statements 149 Specifications Regulatory Statements ...
Page 151: ...Specifications Regulatory Statements 151 Specifications Regulatory Statements ...
Page 152: ...152 Specifications Regulatory Statements ...
Page 164: ...164 Index ...
