Unallocating Global-Active Device Pairs - Hitachi G1000 User Manual

c
.
d
.
e
.
4 On the Overview page:
.
a
.
b
.
5 On the Volume page:
.
a
.
6 Continue stepping through the Identify Performance Problems wizard
.
to review further information on Cache, MP Blades, and Parity Groups.
Result
The performance metrics of global-active device pairs have been displayed for
analysis.
Related topics
• Checking global-active device pair status on page 5-16

Unallocating global-active device pairs

When a host with global-active device pairs is no longer needed, or the
volume redundancy provided by global-active device pairs is no longer
required, you can unallocate the global-active device pairs.
Depending on conditions, when you unallocate global-active device volumes,
the copy pair relationship will be ended, and related copy groups and
configuration definition files (horcmN.conf) could be deleted as a result.
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide
Note: When the global-active device pair (P-VOL and S-VOL) of a
selected global-active device volume are not found in HCS, the
volume cannot be set to a target for analysis. These volumes are
listed separately.
In Select volumes to analyze, Select all selects all listed volumes
for analysis. Click Select manually to individually select volumes or
global-active device pairs (P-VOL and S-VOL) for analysis, and then
click Add to update the Selected Volumes list.
For Select time period to analyze within 30 days before the
current time, configure the time period to analyze.
Click Next.
Check the analysis results and cautions. If there is a resource that
exceeds a threshold value, there might be a performance issue
related to the storage system.
Click Next.
Review the Response Time and IOPS graphs displaying both P-VOL
and S-VOL performance metrics.
Tip: If there is a large disparity between the performance metrics for
the P-VOL and S-VOL, complete the wizard steps to investigate the
issue further and determine the root cause. For example, there could
be significant load variances between the connected hosts for the
primary/secondary storage systems, remote path latencies, or multi-
path software configuration issues.
Using Hitachi Command Suite to set up global-active device
5-19