10.1 HMC and SE introduction 10.1.1 Dynamic Partition Manager support The HMC is a closed system (appliance), which means that no other applications can be  installed on it. The HMC runs a set of management applications. On z15, the HMC can be a stand-alone  computer (mini-tower or rack mounted), or (new with z15) can run (as a Hardware  Management Appliance) on the SEs hardware (1U rack-mounted servers that are integrated  in z15 A frame). The SEs are two 1U servers integral to the z15 frame. One SE is the primary SE (active) and  the other is the alternative SE (backup). As with the HMCs, the SEs are closed systems, and  no other applications can be installed on them. The HMC is used to set up, manage, monitor, and operate one or more CPCs. It manages  IBM Z hardware, its logical partitions (LPARs), and provides support applications. At least one  HMC is required to operate an IBM Z. An HMC can manage multiple Z CPCs, and can be at a  local or a remote site. When tasks are performed at the HMC, the commands are routed to the active SE of the z15.  The SE then issues those commands to their CPC. One HMC can control up to 100 SEs and  1 SE can be controlled by up to 32 HMCs. New with z15, a number of “traditional” SE-only functions moved to HMC tasks. On z15, these  functions appear as native HMC tasks, but run on the SE. These HMC functions run in  parallel with Single Object Operations (SOOs), which simplifies and streamlines system  management. For more information about SOOs, see “Single Object Operations” on  page 429. With Driver 27 (Version 2.13.1), the IBM Dynamic Partition Manager (DPM) was introduced  for CPCs that are running Linux only with Fibre Channel Protocol (FCP) attached storage.  HMC Driver 32 (Version 2.14.0) with MCLs added support for ECKD FICON disks to the DPM  (Release 3.1).  HMC 2.14.1 includes DPM 3.2, with enhanced storage management capabilities. HMC driver  41 (Version 2.15.0) with MCLs added support for FCP and FICON support to the DPM  Release 4.0. DPM is a mode of operation that enables customers with little or no knowledge  of IBM Z technology to set up the system efficiently and with ease.  For more information, see IBM Knowledge Center, click the search engine window, and enter  DPM . The HMC Remote Support Facility (RSF) provides an important communication to a  centralized IBM support network for hardware problem reporting and service. For more  information, see 10.4, “Remote Support Fa cility” on page 427. 410  IBM z15 (8561) Technical Guide