3.3.7 Hot standby in an N+M cold standby configuration
HA Monitor supports hot standby in an N+M cold standby configuration provided by JP1/ServerConductor or HCSM. If a failure occurs on the active server module in an N+M cold standby configuration, HA Monitor performs the hot standby operation. After that, JP1/ServerConductor or HCSM passes the settings and local disks of the active server module to the standby server module. Therefore, you can use standby server modules as standby systems.
- Organization of this subsection
(1) Hot standby operation in an N+M cold standby configuration
The following figure shows the hot standby operation in an N+M cold standby configuration.
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![[Figure]](GRAPHICS/F0000069.GIF)
If a host failure occurs in active server module 1, HA Monitor detects the host failure and switches over to active server module 2. As a result of this hot standby processing, the active server module 2 becomes the active system.
After that, JP1/ServerConductor or HCSM inherits settings to the standby server module, including the various settings for active server module 1 and the local disks. As a result, the standby server module becomes the standby system.
Similarly, if a host failure occurs on active server module 2, the standby server module becomes the standby system.
(2) Required environment settings
To enable hot-standby switchover in an N+M cold standby configuration, you must set a reset path and specify SVP settings. For details, see 6.7.1 Information required for configuration (BladeSymphony) and (6) N+M cold standby configuration.
For details about the N+M cold standby configuration, see the manual in the following list that is appropriate for your system:
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For JP1/ServerConductor
JP1/ServerConductor/Blade Server Manager Series System Administrator's Guide
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For HCSM
HCSM documentation