The Disk chart displays historical statistics on disk usage for the selected local volume.
The following table provides information on predefined views and counters.
Disk/Physical Disk: Disk Read
Rate at which data is read from a volume.
Disk/Physical Disk: Disk Write
Rate at which data is written to a volume.
Disk/Physical Disk: Disk
Sum of read and write rates for a volume.
Datastore Queue Length
Disk/Physical Disk: Avg. Disk Queue Length
Average number of read and write operations queued for a volume.
Disk/Physical Disk: Disk Transfers/sec
Number of read and write operations completed per second, regardless of how much data they involve.
This counter measures disk utilization. If the value exceeds 50, it can be an indicator of a bottleneck.
Disk/Physical Disk: Avg Disk sec/Read
Average time that a read operation from a volume takes.
Disk/Physical Disk: Avg Disk sec/Write
Average time that a write operation to a volume takes.