External Disk Group metrics
Unisphere collects and displays metrics for external disk groups.
External Disk Group 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 disk groups.
| Metric | Description |
|---|---|
| % Disk Busy | The percentage of time the disk group is busy |
| % Idle | The percentage of time the disk group is idle |
| % Used Capacity | The percentage of the disk group capacity that is allocated |
| Avg Queue Depth | The average queue depth - calculated value: Accumulated queue depth/total SCSI commands 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 |
| MBs Read/sec | The read throughput (MBs) of the disk group per second |
| MBs Written/sec | The write throughput (MBs) of the disk group per second |
| MBs/sec | The total number of MBs per second for the disk group |
| Members | The number of members in the external disk group |
| Read RT (ms) | The average time that it took the disk group to serve one read command |
| Reads/sec | The number of reads per second for the disk group |
| Response Time (ms) | The average response time for the reads and writes |
| Total Capacity (GB) | The total capacity of all the disks in the disk group |
| Unmap Command Count | Unmap command count |
| Used Capacity (GB) | The total capacity allocated for all the disks in the disk group |
| Write RT (ms) | The average time that it took the disk group to serve one write command |
| Writes/sec | The number of writes per second for the disk group |