deykau,  Please refer :  Implementing Fully Automated Storage Tiering for Virtual Pools (FAST VP) for EMC® Symmetrix® VMAX™ Series Arrays Technical Notes  Page 20 - 21.
Hello, we have implemented FAST VP on our VMAX. We have a single policy with 3 tiers (FC_R5, FC_R1 and SATA_R5). Few days back, by mistake the PRC was set to 1%, due which, now the SATA_R5 pool is 99% allocated. Now I want to move back the data to the other pools and free up space on the SATA pool. I have set the PRC back to 20%, will this help me to move the data back to the other pools? The other pools have enough free space to accomodate some data from the sata pool. Please let me know the best and fastest way to move data from this pool asap. Thanks.
FAST VP Pool full condition-need to move back data