HP ProLiant DL380p Avoiding server downtime from hardware errors in system mem - Page 4

Application isolation HP Memory Quarantine allows MCA Recovery-aware operating systems to avoid complete system shutdown by isolating the impact of a hard memory error to an application. A hard memory error occurring in a location used by an application (red x in Figure 2) will result in the operating system shutting down that application and then restarting it, avoiding the use of the bad memory location. No other application is affected. Figure 2: Application isolation with HP Memory Quarantine Application System Memory Application Application Application X Operating system with MCA Recovery support BIOS with HP Memory Quarantine Intel Xeon processor with MCA Recovery NOTE: An uncorrectable error can bring the server down if the fault is at a memory location used for certain critical operations by the OS kernel. Virtual machine isolation HP Memory Quarantine allows MCA Recovery-aware hypervisors to avoid complete system shutdown by isolating the impact of a hardware memory error to a VM. A hard memory error occurring in a location used by a VM (red x in Figure 3) will result in the hypervisor shutting down that VM and then restarting it, avoiding the use of the bad memory location. No other VM is affected. Figure 3: Virtual machine isolation with HP Memory Quarantine System Memory Virtual Machine A VM B VM C App App App VM C Operating System X Hypervisor with MCA Recovery support BIOS with HP Memory Quarantine Intel Xeon processor with MCA Recovery NOTE: An uncorrectable error can bring the server down if the fault is at a memory location used for certain critical operations by the hypervisor. 4