Flash Cache modules and Performance Acceleration Modules (PAMs) have LEDs that you can check to ensure that the card has power or to learn about its performance.
Flash Cache modules are available in capacities of 256 GB, 512 GB, and 1 TB. PAMs have a capacity of 16 GB.
This document uses the term Flash Cache module to refer to caching modules with capacities greater than 16 GB. Before the release of Data ONTAP 7.3.5, such adapters were called Performance Acceleration Modules (PAM II). The name of the 16-GB caching module remains Performance Acceleration Module (PAM I).