The version of DRBD you receive with these instructions may vary considerably depending on the age of your distribution. Though DRBD 9.0 is the latest official release, DRBD 8.4 is the most recent stable version included with many distributions at the time of writing this book. As such, all recipes assume that this is the installed version. To see if you are using 8.4, execute drbdadm with the -V parameter and check the DRBD_KERNEL_VERSION_CODE output. If this value doesn't include 804 or greater, please follow the instructions from one of these URLs to upgrade to 8.4:
- For Red Hat systems: http://www.drbd.org/en/doc/users-guide-84/s-build-rpm
- For Debian systems: http://www.drbd.org/en/doc/users-guide-84/s-build-deb
If you ...
