HP StorageWorks 2000 Modular Smart Array Reference Guide (481599-003, August 2008)

172 HP StorageWorks 2000 Family Modular Smart Array reference guide • August 2008
Rate Statistics for Virtual Disks
You can view the following I/O statistics for all virtual disks:
■ The total IOPS and bandwidth for all virtual disks
■ The IOPS and bandwidth for each virtual disk
To view overall rate statistics for virtual disks:
● Select Monitor > Statistics > Overall Rate Stats.
Statistics shown are based on host-side activity in the interval since the page was
last refreshed. The page automatically refreshes at a 60-second interval.
Cumulative Statistics for Virtual Disks
You can view the following I/O statistics for all virtual disks:
■ The Statistics For All Virtual Disks panel shows the total number of host read
and write operations, sectors read and written, and queue depth for each
controller module’s host ports.
■ The Total For All Virtual Disks - Host Read I/O Size Histogram panel shows how
many host read operations fell into a particular size range for all virtual disks.
The I/O ranges are based on powers of two.
■ The Total For All Virtual Disks - Host Write I/O Size Histogram panel shows
many host write operations fell into a particular size range for all virtual disks.
The I/O ranges are based on powers of two.
■ The Host Port Queue Depth & I/O Details panel shows the activity for each port
connected to a host. Queue depth is the number of host-originated commands
currently queued for the port. Last I/O size is the size of the last host access in
sectors. An operation that is not a read or write sets this value to zero.
To view cumulative statistics for virtual disks:
● Select Monitor > Statistics > Cumulative Stats.
Statistics shown are based on host-side activity in the interval since the page was
last refreshed. The page automatically refreshes at a 60-second interval.