HP StorageWorks 2000 Series Reference Manual page 198

6. Review the information displayed in the status page.
If the fault relates to a controller module or power module, an image of the
enclosure is displayed.
The module is shaded red if it has a fault or is powered off.
The module is overlaid with the words "NOT INSTALLED" if it is absent or not
fully inserted.
When troubleshooting drive and connectivity faults, ensure you have a current full
backup. As an additional data protection precaution, stop all I/O to the affected
virtual disks. When on-site, you can verify that there is no I/O activity by briefly
monitoring the system LEDs; however, when accessing the storage system remotely,
this is not possible.
To check the I/O status of a remote system, use the Monitor > Statistics > Overall
Rate Stats page. The Overall Rate Stats page enables you to view I/O based on the
host-side activity interval since the page was last refreshed. The page automatically
refreshes at a 60-second interval. The following data is presented for all virtual
disks:
The total IOPS and bandwidth for all virtual disks
The IOPS and bandwidth for each virtual disk
To use the Overall Rate Stats page to ensure that all I/O has ceased on a remote
system:
1. Quiesce host applications that access the storage system.
2. Select Monitor > Statistics > Overall Rate Stats.
3. Click your browser's refresh button to ensure that current data is displayed.