HP B6960-96035 User Manual download pdf (Page 176)

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Figure 53 Example multipath configuration

Why use multiple paths

With previous versions of Data Protector, a device could be accessed from only one

client. To overcome this problem, several logical devices had to be configured for a

physical device using a lock name. Thus, if you were using lock names for configuring

access from different systems to a single physical device, you had to configure all

devices on every system. For example, if there were 10 clients which were connected

to a single device, you had to configure 10 devices with the same lock name. With

this version of Data Protector, you can simplify the configuration by configuring a

single multipath device for all paths.

Multipath devices increase system resilience. Data Protector will try to use the first

defined path. If all paths on a client are inaccessible, Data Protector will try to use

paths on the next client. Only when none of the listed paths is available, the session

aborts.

Path selection

During a backup session, the device paths are selected in the order defined during

the device configuration, except if a preferred client is selected in the backup

specification. In this case, the preferred client is used first.

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HP B6960-96035 User Manual Page 176

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