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

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N+M cold standby

N+M cold standby overview

The N+M cold standby is a function to switch over from the active partition (task

partition) to a standby partition in case of hardware failure. It is a management

server, ServerConductor/Blade Server Manager Plus (BSM Plus hereinafter) or

Hitachi Compute Systems Manager (HCSM) that receives and analyses a report on

the hardware failure in the partition.

Providing a standby partition to multiple active partitions enables the operation to

resume by activating the standby partition. The operation is temporarily interrupted

due to a hardware-failure, but the corrective actions from a failure occurrence to the

operation resumption can be streamlined with less hardware resources.

The N+M cold standby function supports LPAR manager (by BSM Plus). When the

hardware fault occurs in the active partition on which multiple LPARs are running,

those running on the active partition are rebooted on the standby partition. The

standby partition can be shared between the active partitions in both Basic mode

and LPAR manager mode.

Active Partitions

Standby Partitions

Normal Operation

N+M Replacement

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