Cache management device requirements
Cache management devices are used to manage the cache associated with volumes (LDEVs). Each volume (LDEV) requires at least one cache management device. An LDEV that is not a DP-VOL requires one cache management device. For an LDEV that is a DP-VOL, you need to calculate the number of cache management devices required.
The storage system can manage up to the following number of cache management devices:
- VSP G800 or VSP F800: 32,512
- VSP G400, G600 or VSP F400, F600: 7,936
- VSP G200: 3,840
The View Management Resource Usage window displays the number of cache management devices in use and the maximum number of cache management devices. For details, see Viewing the number of cache management devices.