HP StorageWorks Command View SDM Installation and User Guide (T1086-96023, February 2005)

180 Command Line User Interface
Total Logical Blocks Transferred
Rate (release 1.05)
Total Logical Blocks Throughput
(prior to 1.05)
ARRAY
LUN
The average number of logical blocks transferred per
second by read and write commands.
Usage
This metric is a measure of the performance level being
achieved by the array and also provides some indication
of the demand level of the host workload. High total
throughput will not be achieved when the workload
demand is low
Total Mbytes Read DISK-PORTS The total number of bytes either successfully or
unsuccessfully written to the drive. If a transfer terminates
early because of an unrecoverable error, only the logical
blocks up to and including the one with the unrecoverable
error are counted.
Usage
Indicates the amount of read activity for this drive. This
metric for all the disks can be compared to determine if
there is an imbalance in the workload that is causing a
single disk or a small set of disks to be a performance
limitation. The array attempts to spread the workload
evenly across all the disks but certain workload patterns
could possibly defeat this process.
Total Mbytes Written DISK-PORTS The total number of bytes either successfully or
unsuccessfully written to the drive. If a transfer terminates
early because of an unrecoverable error, only the logical
blocks up to and including the one with the unrecoverable
error are counted.
Usage
Indicates the amount of write activity for this drive. This
metric for all the disks can be compared to determine if
there is an imbalance in the workload that is causing a
single disk or a small set of disks to be a performance
limitation. The array attempts to spread the workload
evenly across all the disks but certain workload patterns
could possibly defeat this process.
Table 12 Performance Metrics (Continued)
Metric Categories Description/Usage