IBM N Series, Руководство по оборудованию

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Chapter 7. Highly Available controller pairs
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7.4 Managing an HA pair configuration
This section describes the considerations and activities that are related to managing an HA
pair configuration.
The following methods can be used to manage resources and to perform takeover or
giveback from one node to another node:
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Data ONTAP command-line interface (CLI)
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Data ONTAP FilerView
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IBM System Manager for N series
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Operations Manager
7.4.1 Managing an HA pair configuration
At a high level, the following tasks are involved in managing an HA pair configuration:
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Monitoring HA pair configuration status
򐂰 Viewing information about the HA pair configuration:
– Displaying the partner’s name
– Displaying disk information
򐂰 Enabling and disabling takeover
򐂰 Enabling and disabling immediate takeover of a panicked partner
Disk drive No No If a disk fails, the storage system can reconstruct data from
the RAID 4 or RAID DP. No failover is needed in this situation.
Disk shelf (including
backplane) No No A disk shelf is a passive backplane with dual power supplies,
dual fans, dual ESH2s, and dual FC-AL loops. It is the most
reliable component in a storage system.
Power supply No No The storage system and the disk shelf feature dual power
supplies. If one power supply fails, the second power supply
automatically takes effect. No failover is needed in this
situation.
Fan (storage system
or disk shelf) No No The storage system head and disk shelf have multiple fans.
If one fan fails, the second fan automatically provides cooling.
No failover is needed in this situation.
Cluster adapter N/A No If a cluster adapter fails, the failover capability is disabled but
both storage systems continue to serve data to their
respective applications and users.
HA pair configuration
interconnect cable N/A No The cluster adapter supports dual cluster interconnect
cables. If one cable fails, the HA pair traffic (heartbeat and
NVRAM data) is automatically sent over the second cable
with no delay or interruption.
If both cables fail, the failover capability is disabled; however,
both storage systems continue to serve data to their
respective applications and users.
Hardware
component SPOF SPOF eliminated
Non-HA
pair HA pair