The rear view of the PCIe I/O drawer and the Resource Group assignment by card slot are  shown in Figure 9-4. All PCIe I/O drawers that are installed in the system feature the same  Resource Group assignment. The HMC and the SE include the following RAS capabilities: For the customers who do not have an FTP server that is defined for backups, the HMC  can be configured as an FTP server, which is new with z14. On a scheduled basis, the HMC hard disk drive (HDD) is backed up to the USB flash  memory drive (UFD), a defined FTP server, or both. (RG1) (RG3) (RG1) (RG3) PCIe Switch (RG1) (RG3) (RG1) (RG3) FSP1 FSP2 (RG4) (RG2) (RG4) (RG2) PCIe Switch (RG4) (RG2) (RG4) (RG2) RII LG01 LG02 LG03 LG04 LG05 LG07 LG08 LG09 LG10 LG06 PCIe2 I/O Drawer – Rear view IPC1 / PSU1 IPC2 / PSU2 LG11 LG12 LG13 LG14 LG15 LG17 LG18 LG19 LG20 LG16 Domain 0 Domain 1 Note: Resource Groups (RGs) in parentheses apply to “native” PCIe  features   Do main 0 Domain 1 Rear view Figure 9-4 Resource Group slot assignment 9.9 RAS capability for the HMC and SE GLYPH<SM590000> Back up from HMC and SE GLYPH<SM590000> Remote Support Facility (RSF) GLYPH<SM590000> Microcode Change Level (MCL)  GLYPH<SM590000> SE SE HDDs are backed up on to the primary SE HDD and an alternative SE HDD. In  addition, you can save the backup to a defined FTP server. For more information, see 11.2.6, “New backup options for HMCs and primary SEs” on  page 362. The HMC RSF provides the important communication to a centralized IBM support  network for hardware problem reporting and service. For more information, see 11.4,  “Remote Support Facility” on page 374. Regular installation of MCLs is key for RAS, optimal performance, and new functions.  Generally, plan to install MCLs quarterly at a minimum. Review hiper MCLs continuously.  You must decide whether to wait for the next scheduled apply session, or schedule one  earlier if your risk assessment of the new hiper MCLs warrants.  For more information, see 11.5.4, “HMC and SE microcode” on page 380. z14 ZR1 is provided with two 1U trusted servers inside the rack: one is always the primary  SE and the other is the alternative SE. The primary SE is the active SE. The alternative  acts as the backup. Information is mirrored once per day. The SE servers include N+1  redundant power supplies. For more information, see 11.2.5, “New SEs” on page 362. 340  IBM 14 Model ZR1 Technical Guide