Hardware Cache window

You can use the Hardware Cache window to enable or disable Flash Cache modules for a storage system that has a Flash Cache module installed. You can also view the read-workload statistics.

The Hardware Cache window does not display clusters containing nodes with All Flash Optimized personality.

Module Information

Storage system name
The name of the storage system that has a Flash Cache module installed displays under the graphic.
Enabled/Disabled toggle button
Move the toggle button to enable or disable the module.
Size
The size of the module in gigabytes. If there are multiple Flash Cache module cards, the total cache size from all of the cards is displayed.
Note: The Flash Cache module size that is displayed differs from the actual Flash cache module size for the following reasons:
  • System Manager reports only the usable capacity that is provided by ONTAP.
  • A portion of the total SSD capacity is reserved for storing metadata.
Model Names
The model names of the modules.
System Read Latency
Displays the system read latency in milliseconds.

Flash Cache Read Workload

Indicates storage system performance by displaying a graph specifying the rate of the read workload that is served by the disks and the Flash Cache module.