HP StorageWorks Enterprise Virtual Array Online Firmware Upgrade Best Practices (5697-6388, January 2007)

• -sz array limits data collection to the speciﬁed array(s). You must enter at least one array

and can use either the storage system WWN or friendly name.

• -fo filename directs output to a speciﬁed ﬁlename. Include the path information as necessary.

NOTE:

The HP Command View EVAPerf as command provides an alternative to the hps command for

gathering and displaying IOPS and I/O throughput.

Figure 5 Sample host p ort statistics

Capturing virtual disk statistics

Use the following comma nd to capture the virtual disk statistics:

evaperf vd -csv cont n -dur n -sz array -fo filename

The com m and parameters are described in the p receding section.

Virtual disk statistics are useful for identifying a virtual disk that has signiﬁcant activity at a given point

in time. For example, assume a storage system with multiple virtual disks that are all nearly idle with

the exception of a single virtual disk. To perform an online upgrade, it may be desirable to halt the

application that is imposing the load on the busy logical drive. This may be preferable to doing an

ofﬂine upgrade.

Figure 6 Samp le virtual disk statistic s

Capturing all HP Command View EVAPerf statistics

If you would like to capture all the HP Command View EVAPer f statistics, use the following command:

evaperf all -csv cont n -dur n -sz array -fo filename

The com m and parameters are described in the p receding section.

Evaluating the SAN for an online upgrade