Storage Group by Pool metrics
Unisphere collects and displays metrics for storage groups (by pool).
Within the PM metrics section, V4 is used to denote that the metric is supported only by a storage system (array) running PowerMaxOS 10 (6079). V3 is used to denote that the metric is supported only by a storage system (array) running HYPERMAX OS 5977 or PowerMaxOS 5978. Metrics without the denotation are supported by all storage systems (arrays).
The following table lists all metrics that are available for storage groups (by pool).
| Metric | Description |
|---|---|
| Allocated Capacity | The total allocated SG capacity |
| Allocated Tracks | The number of allocated tracks in the storage group (by pool) |
| BE Read Reqs/sec | The number of read requests each second performed by the disk directors to cache |
| BE Reqs/sec | The number of read/write requests each second performed by the disk directors to cache |
| BE Throughput Read | The number of MBs read each second by the disk directors |
| BE Throughput Transferred | The MBs transferred per second to the disk directors |
| Destage Write Throughput | The size (MBs) of writes per second that were destaged to disk |
| Destage Writes/sec | The number of writes per second that were destaged to disk |
| IO Density | The number of BE requests per GB of disk |
| Local Replication Tracks | Local replication tracks |
| Prefetched Throughput | The number of MBs prefetched from disk to cache in a second |
| Prefetched Tracks/sec | The number of tracks prefetched from disk to cache in a second |