Mechanism Of The N+M Cold Standby - Hitachi Compute Blade 2000 User Manual

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Mechanism of the N+M cold standby

 Mechanism of the N+M Cold Standby

(1) Partition in Basic mode

In the N+M cold standby, various settings on active partitions are taken over by the

standby partition when N+M failover of partitions occur in the Basic mode.

You can, therefore, boot the server from the same disk logical unit (LU), and resume

the same OS environment as the active partition, on the standby partition.

Hereinafter, the settings to be taken over are referred to as "partition configuration

information" or merely "configuration information".

FC switch/SAS switch

The same hardware configuration and same firmware

version must be installed in the active partition and the

standby partition.

(2) Partition in LP mode

In the N+M cold standby, LPAR manager configuration information for the active

partition such as LPAR setting, LPAR status, and WWN information, managed by

LPAR manager, are copied and taken over to the standby partition, which is booted

in the LP mode. This can allow the standby partition to recreate the same LPAR

configuration for the active partition even if the server blades are switched. Each

LPAR is booted from the same disk (LU) as the active partition to resume the OS

environment. Hereinafter, the settings to be taken over are referred to as "partition

configuration information" or merely "configuration information".

Interface expansion card

Interface expansion card

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