Selecting An Appropriate Time To Perform An Online Upgrade; Analyzing Storage System I/O Using Hp Command View Evaperf; Tips For Using Hp Command View Evaperf - HP 6400/8400 Software Manual

NOTE:
After completing required upgrades, HP recommends that you create a new SAN Visibility report to
verify that all upgrades are were successful.

Selecting an appropriate time to perform an online upgrade

To ensure the success of an online upgrade, selecting the appropriate time is essential. Because the
online firmware upgrade is performed while host I/Os are being serviced, the I/O load can impact
the upgrade process. Selecting a period of low I/O activity will ensure the upgrade completes as
quickly as possible, and will avoid disruptions to host and applications due to timeouts.
While there are advantages to performing an online upgrade, there are circumstances when it is not
advisable. Therefore, give careful consideration to the circumstances of your configuration and your
application deployment before making an attempt to do an online upgrade.
NOTE:
When determining an appropriate time to do an online upgrade, ensure that no configuration-related
replication tasks (creating or deleting DR groups, snapshots, snapclones, containers, mirrorclones or
presenting to hosts) are being performed.

Analyzing storage system I/O using HP Command View EVAPerf

The HP Command View EVAPerf tool included with HP Command View EVA can be used to gather
and analyze statistics on storage system utilization. This section provides recommendations on using
HP Command View EVAPerf to gather statistics to help identify periods of low storage system activity.
For more information about HP Command View EVAPerf, see the "Monitoring array performance"
chapter of the HP StorageWorks Command View EVA user guide for more information. See
for the link to this guide.
IMPORTANT:
If you have an array-based management system, you can install and run HP Command View EVAPerf
on a supported Windows host connected to the EVA4400.

Tips for using HP Command View EVAPerf

Use HP Command View EVAPerf to identify periods of low I/O activity, during which you can safely
perform on online upgrade of the storage system firmware. Use the following tips to ensure that you
select an appropriate period during which I/O is low and remains low.
NOTE:
Before using HP Command View EVAPerf, you may want to configure friendly names to simplify
identifying your storage systems, virtual disks, and hosts. See the HP StorageWorks Command View
EVA user guide for more information about friendly names.
HP StorageWorks Enterprise Virtual Array updating product software guide (XCS 09522000)
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