Product : Dell EMC, PowerFlex [SDS]/3.5, Enterprise
Feature : Flash Purpose, Flash, Storage Support
Content Owner:  Herman Rutten
Read Cache
Write Buffer (Flash Storage Pools)
Storage Tier
PowerFlex calls the use of Flash as caching layer Read Flash Cache (rfcache). This is a tunable feature: rfcache can be enabled or disabled. Rfcache is used to increase read performance and buffers writes to increase the performance of Read-after-Write I/Os.