content_image/995699.jpg
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. 

<img src='content_image/995699.jpg'>

## 9.9 RAS capability for the HMC and SE 

The HMC and the SE include the following RAS capabilities: 

GLYPH<SM590000> Back up from HMC and SE 

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. 

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. 

GLYPH<SM590000> Remote Support Facility (RSF) 

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. 

GLYPH<SM590000> Microcode Change Level (MCL) 

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. 

GLYPH<SM590000> SE 

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. 

