Note: If the system hangs or is non-responsive after starting the system, go to“Startup problems” on page 152.If the blade server hangs, you can force the blade server to start the backup imageby using the code page jumper (J14).Recovery of system firmware code using service aidsLinux on pSeries service aids for hardware diagnostics are available for customerswho have installed and are running Linux. Users can install these free diagnosticstools for effective diagnosis and repair of the system in the rare instance when asystem error occurs.This service aid toolkit provides the key tools required to take advantage of theinherent pSeries hardware RAS functions as outlined in the Linux on pSeries RASWhitepaper available from http://techsupport.services.ibm.com/server/Linux_on_pSeries/images/Linux_RAS.pdfsuch as first failure data capture and errorlog analysis. With the toolkit installed, problem determination and correction isgreatly enhanced and the likelihood of an extended system outage is reduced.The Linux service aids for hardware diagnostics are separate from the operatingsystem installation and are available for download from the following Web site:http://techsupport.services.ibm.com/server/lopdiags/.Note: The Update_Flash command can only be performed if the Linux service toolshave been installed on the JS20 blade server.Starting the backup imageTo force the blade server to start the backup image, complete the following steps:Note: Do not perform these steps if the system error code 20D00902 has alreadyoccurred on the blade server.1. Turn off the blade server and remove it from the BladeCenter unit (see“Removing the blade server from the BladeCenter unit” on page 73).2. Open the blade server cover (see “Opening the blade server cover” on page74).System firmware codepage jumper (J14)3213. Locate jumper J14 (system firmware code page jumper) on the system board.4. Remove jumper J14 from pins 1 and 2, and reinstall on Pins 2 and 3 of J14 toenable system firmware recovery mode.Chapter 7. Diagnostics 55
