Let's start with a simple one. Sometimes an Xsan Volume won't mount after an unexpected shutdown.
The Mac OS X operating system (as well as all other unices OS) mounts filesystems in a folder. That mean that every time we plug a USB thumb drive, external hard drive or Xsan volume, it creates a folder in /Volumes using the name of the volume. This folder will serve as a pointer to the actual content of the drive.
If a drive with the same name is already plugged-in (that is, a folder with this name already exists), Mac OS X creates a new folder, appending 1.
Sometimes, the created folder isn't removed because of an unexpected shutdown. This means that either the Volume doesn't mount (this is usually the case with Xsan), or file paths are different, causing file offline issues.
How to solve this
Last login: Mon Jan 25 07:54:49 on ttys000 Bosco$ cd /Volumes/ Bosco$ ls Macintosh HD SANVolume 1 Bosco$ rmdir SANVolume 1/ Bosco$ sudo xsanctl mount SANVolume Bosco$References