Service Procedures for Linux on IBM Power Systems ServersCollecting data on first occurance of the problem can id in problem determination and timely resolution of defects. At IBM®, this process of collecting data on first occurance if often referred to as First Failure Data Capture (FFDC). Gathering this data before reporting a defect helps to understand the problem more quickly and thoroughly, which saves time analyzing data and reduces the time and mission affects in fixing defects. Several diagnostic capabilities are built into the Linux operating system that enable you to determine the application level problems and system level problems. Collecting FFDC logs early, even before opening a defect report, helps to quickly determine whether:
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accepting the default add crashkernel=xxM apt-get install available to IBM bootloader collected config configuration file configuring FADump Console logs crash dump crashkernel parameter crashkernel=xxM to GRUB_CMDLINE_LINUX curl daemon default settings described dev/null DLPAR dmesg dmsetup drmgr dump capture eth0 example fadump=on rd.lvm.lv=rhel_peplp25/root rd.lvm.lv=rhel_peplp25/swap Fibre Channel Firmware Assisted Dump following command grep GRUB_CMDLINE_LINUX in etc/default/grub GRUB_CMDLINE_LINUX="crashkernel=4096M fadump=on rd.lvm.lv=rhel_peplp25/root IBM Support engineers InfiniBand initrd install crash install kdump install kexec-tools Installation issue International Business Machines kernel cmdline kernel command line kernel panic libvirt log files LPAR memory dump memory reservation multipath netboot nvme output packages plug-ins post-installation problem seen programs QEMU RedHat repository required in megabytes reserved boot memory RHEL rsct_rm Run the following Saving debug logs SCSI server SLES sosreport sosreport/supportconfig specify reserved boot steps strace supportconfig SuSE sysrq system configuration tcpdump tmux tool Ubuntu utility want to specify wget workload yaboot yum install zypper install