About Global-Active Device Failures; Recovering From Hba-Related Host Path Failures - Hitachi G1000 User Manual

About global-active device failures

Failures need to be identified when they occur, and actions taken to remedy
the failure and re-synchronize global-active device pairs.
Failure types include:
• Host path failures (HBAs, SAN switches, or Target ports) between hosts
and primary or secondary storage systems.
• Remote path failures (Initiator/RCU Target ports) between primary and
secondary storage systems.
• External storage (quorum) path failures between the external storage
system and primary/secondary storage systems, or failure of the quorum
disk, or failure of the external storage system.
• Primary or Secondary storage system failure.
• Primary or Secondary site failure.
Failures typically cause global-active device pair status to change from
normal (for example, PAIR status) to some combination of status information
indicating unavailability of a P-VOL, an S-VOL, or both.
For all failures (except host path failures) SIM reference codes and
descriptions are used to identify the nature of the failure. When the failure
has been resolved, copy pairs need to be re-synchronized using CCI or
Replication Manager.
HCS can be used to perform a limited number of recovery tasks that are
included in this section.
Related topics
• Recovering from HBA-related host path failures on page 5-22

Recovering from HBA-related host path failures

Remedy the HBA-related host path failure that is preventing host I/O to the
storage system.
A SIM is not generated from a host path failure. However, there is a failure
on the physical path between the host and the storage system.
Procedure
1 Using multi-path or SAN management software, identify the failure
.
location.
2 Remedy the failure by doing one of the following:
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¢
¢
3 Using multi-path software, resume I/O for the host on the recovered
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path.
5-22
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide
Reconnect the physical path or reconfigure the SAN to recover from
the path failure.
If you confirm a failed HBA, replace it.
Using Hitachi Command Suite to set up global-active device