Create an initial RAM disk image file for the kdump function

Create an initial RAM disk image file for the kdump function. This file will be used by the second kernel when a kernel dump is collected.

1. Restart the host.

   # shutdown -r now

2. After the host restarts, log in as a user with root privileges.

3. If the /var/crash/hdlm directory does not exist, use the mkdir command to create the directory.

   # mkdir /var/crash/hdlm

4. Check the definition of hdlm_dracut in /etc/opt/DynamicLinkManager/hdlm.conf.

   If hdlm_dracut=n is defined, change it to hdlm_dracut=y. If hdlm_dracut is not defined, add hdlm_dracut=y.

5. Restart the kdump service, and then create an initial RAM disk image file for the kdump function.

   # touch /etc/kdump.conf
   # systemctl restart  kdump.service
   #

   Note

   Do not change the definition of hdlm_dracut (hdlm_dracut=y) in /etc/opt/DynamicLinkManager/hdlm.conf.

6. Verify that the initial RAM disk image file was created.

   # ls -l /boot/initrd-`uname -r`kdump.img
   -rw-------. 1 root root 6499431  mmm dd hh:mm /boot/initrd-2.6.32-754.el6.x86_64kdump.img

   Check the displayed update time of the file.

7. Restart the host.

   # shutdown -r now