The installation and activation of any pre-planned memory requires the purchase of the  required feature codes (FCs), as listed in Table 2-8. Memory ZR1 feature code Pre-planned memory Charged when physical memory is installed. Used for tracking the quantity of physical increments of  plan-ahead memory capacity. GLYPH<SM590000> FC 1993 - 8 GB GLYPH<SM590000> FC 1996 - 16 GB Virtual Flash Memory (VFM) Pre-planned Memory Charged when physical memory is installed. Used for tracking the quantity of physical increments of  plan-ahead VFM memory capacity. FC 1999 - 64 GB Pre-planned memory activation Charged when plan-ahead memory is enabled. Used for tracking the quantity of increments of plan-ahead  memory that are being activated. GLYPH<SM590000> FC 1739 (8 GB memory  capacity Increments <128GB) GLYPH<SM590000> FC 1740 (8 GB memory  capacity Increments >=128GB) GLYPH<SM590000> FC 1741(16 GB memory  capacity Increments >1=28GB) GLYPH<SM590000> FC 1742 (32GB memory  capacity increments >=128GB Table 2-8 Feature codes for plan-ahead memory The payment for plan-ahead memory is a two-phase process. One charge occurs when the  plan-ahead memory is ordered. Another charge occurs when the prepaid memory is activated  for use. For more information about the exact terms and conditions, contact your IBM  representative. Pre-planned memory is installed by ordering FC 1993 (8 GB) or FC 1996 (16 GB). The  ordered amount of plan-ahead memory is charged at a reduced price compared to the normal  price for memory. One FC 1993 is needed for each 8 GB of usable memory (10 GB RAIM), or  one FC 1996 is needed for each 16 GB of usable memory (20GB RAIM). Reminder:  Maximum amount of preplanned memory is limited to 2TB IBM Z servers continue to deliver enterprise class RAS with IBM z14 ZR1 servers. The main  philosophy behind RAS is about preventing or tolerating (masking) outages. It is also about  providing the necessary instrumentation (in hardware, LIC and microcode, and software) to  capture or collect the relevant failure information to help identify an issue without requiring a  reproduction of the event. These outages can be planned or unplanned. Planned and  unplanned outages can include the following situations (examples are not related to the RAS  features of IBM Z servers):  2.6 Reliability, availability, and serviceability GLYPH<SM590000> A planned outage because of added processor capacity GLYPH<SM590000> A planned outage because of added I/O cards GLYPH<SM590000> An unplanned outage because of a power supply failure GLYPH<SM590000> An unplanned outage because of a memory failure 46  IBM 14 Model ZR1 Technical Guide