External Disk metrics
Unisphere collects and displays metrics for external disks.
External Disk metrics are supported only by storage systems (arrays) running HYPERMAX OS 5977 or PowerMaxOS 5978.
The following table lists all metrics that are available for external disks.
| Metric | Description |
|---|---|
| % Busy | The percent of time the disk is busy |
| % Idle | The percent of time the disk is idle |
| % Used Capacity | The percent of the external disk that is used |
| Avg Queue Depth | The average queue depth - calculated value: Accumulated queue depth/total SCSI command per sec |
| Avg Read Size (KB) | The average number of kilobytes for a single read command |
| Avg Write Size (KB) | The average number of kilobytes for a single write command |
| IOs/sec | The total number of read and write I/Os per second for the external disk |
| MBs Read/sec | The read throughput (MBs) of the external disk per second |
| MBs Written/sec | The write throughput (MBs) of the external disk per second |
| MBs/sec | The size of the I/O from the host to the external disk per second |
| Read RT (ms) | The average time that it took the external disk to serve one read command |
| Reads/sec | The number of host reads per second for the external disk |
| Response Time (ms) | The average response time for the reads and writes |
| Total Capacity (GB) | The total capacity of the external disk (GBs) |
| Unmap Command Count | The unmap command count |
| Used Capacity (GB) | The used capacity of the external disk (GBs) |
| Write RT (ms) | The average time that it took the external disk to serve one write command |
| Writes/sec | The number of host writes per second for the external disk |