Xsan is disabled after installing Security Update 2005-002

If you're running Xsan and just installed Security Update 2005-002, you may come across an issue where the Xsan filesystem becomes disabled and won't start up. This happens because this security update overwrites the hostconfig file in the /etc directory, which removes the command to start the Xsan filesystem.

To resolve this issue, modify the hostconfig file as follows:

1. Launch the Terminal (/Applications/Utilities).
2. Change to the root user by typing su root. Type your password when prompted.
3. Type cd /etc to navigate to the /etc directory.
4. Open your preferred editor (such as vi, emacs, or pico), and use it to add the following line to the bottom of the hostconfig file:
   ACFS=-YES-.
5. Save the file and then close your editor application.
6. Restart your computer.

Note: You will need to modify the hostconfig file on all Xsan clients and Metadata Controllers after installing Security Update 2005-002.