Archived - Xsan: Cannot see or label LUNs during setup

This article has been archived and is no longer updated by Apple.


During setup, Xsan Admin may not show LUNs with Mac OS Extended (also called HFS Plus, or HFS+) filesystems. This means they cannot be labeled as Xsan LUNs.


Use Disk Utility to reformat the affected LUNs as "Free Space".

If formatting as "Free Space" does not allow Xsan Admin to label the LUNs, you should use the following Terminal command:

sudo dd if=/dev/zero of=/dev/disk-id bs=1m count=200

...where, disk-id is the device identifier. You can find this identifier by selecting the disk in Disk Utility and then clicking the Info button in the Toolbar.

Xsan Admin should then list the LUNs, and allow them to be labeled as Xsan LUNs.

Last Modified: May 2, 2013
  • Last Modified: May 2, 2013
  • Article: TS1370
  • Views:

  • Rating:
    • 100.0

    (1 Responses)

Additional Product Support Information

Start a Discussion
in Apple Support Communities
See all questions on this article See all questions I have asked