Dump is saved in /var/crash even if a different location is specified in the environment booted from FC-SAN device

Solution Verified - Updated -

Issue

  • In the environment booted from FC-SAN device, even if the location where dump is saved to FC-SAN disk is specified in /etc/kdump.conf, dump is saved in /var/crash.
  • This problem seems to occur because the order that recognizes the device of FC-SAN is different on usual kernel and kernel for kdump.
  • In a case of a customer, all devices including FC-SAN are detected on normal kernel as follows:
    /dev/sda - FC-SAN logical disk
    /dev/sdb - FC-SAN logical disk
    /dev/sdc - Onboard disk
  • Those are also detected on kdump kernel in different order:

    /dev/sda - Onboard disk
    /dev/sdb - FC-SAN logical disk
    /dev/sdc - FC-SAN logical disk

Environment

  • Red Hat Enterprise Linux 5.3
  • kernel-2.6.18-128.el5
  • kexec-tools-1.102pre-56.el5 or later version

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