Recovery procedures of ha system configuration, Recovery procedures of ha system configuration 353, Scenario – HP XP Continuous Access Software User Manual

Page 353: A failure occurs in host a or in the p-vol

HA Failover and failback

353

Recovery procedures of HA system configuration

After installing CA, the system administrator should conduct operation
tests on the assumption that system failures may occur. In normal
operation, service personnel obtain failure cause information from the SVP.
However, the CA commands may also give error information.

XP256 microcode 52-47-xx and under

XP512/48 microcode 10-00-xx and under

The following figure shows a diagram of system failure and recovery.

Scenario

1. A failure occurs in host A or in the P-VOL.

P-VOL recovers.

pairsplit -S

paircreate

Takeover

Host A

Host B

vol

Host A

Host B

vol

SMPL

Host A

Host B

vol

pairsplit -S

paircreate

e Entire copy

Host A goes down.

Host A

Host B

vol

Vol

Host A

Host B

vol

SMPL

Host A

Host B

vol

e Entire copy

P-VOL goes down.

Mirroring state

Takeover state

Recovery state

Failover

upon primary

host failure

Failover

upon primary

storage failure

This manual is related to the following products:

XP RAID Manager Software