Response Time From The External Storage System - Hitachi G1000 User Manual

Suspended pairs depending on failure location (shared quorum disk)
When a quorum disk is shared by more than one connections, all GAD pairs
which share a quorum disk are suspended, regardless of the failure locations,
as shown below.
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1
2
3
4
5
6
Related topics
• Relationship between the quorum disk and number of remote connections
on page 3-11

Response time from the external storage system

If the response time from the external storage system for quorum disks is
delayed for more than one second, GAD pairs might be suspended by some
failures. Monitor regularly the response time of the quorum disks using
Performance Monitor from the primary storage system or secondary storage
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide
Failure locations
Remote connection 1 from the
primary site to the secondary site
Remote connection 1 from the
secondary site to the primary site
Remote connection 2 from the
primary site to the secondary site
Remote connection 2 from the
secondary site to the primary site
Path to the quorum disk 1
Quorum disk 1
Planning for global-active device
GAD pair 1
Suspended Suspended
Suspended Suspended
Suspended Suspended
Suspended Suspended
Suspended Suspended
Suspended Suspended
GAD pair 2
3-15