IPL Completion Indicator Based On Previous IPL Timings
Original Publication Date: 2001-Jul-21
Included in the Prior Art Database: 2003-Jun-18
With current Firmware designs there are no possible way of knowing how much time it will take to boot up a system. IBM Server systems have Service Processors (SP) independent of main system processors. The Service Processor complex has its own processor and memory and has access to Non-Volatile Random Access Memory( NVRAM). Service processor initializes system complex and boot Operating System (OS) to operation. This method uses the information stored by Service Processors in NVRAM from the previous boot. After each subsequent boot, system firmware will know how long it will take to boot the same system. Thus enabling SP to post on to the Operator Panel (LED indicator) the of time left for completion to OS login prompt. The main advantage to having a complex Server System notify the user of how much longer it will take to complete its boot process is that it allows the customer to decide when to schedule rebooting a system. If it is too long he can schedule it overnight or offshift times.