If you can’t mount a volume on a client, If you can’t unmount a volume on a client, If raid luns aren’t accessible over fibre channel – Apple Xsan 2 (Third Edition) User Manual
Page 101: If you have problems using command-line tools, If a lun doesn’t have as much space as expected, If you can’t rename an xsan volume in the finder

Chapter 8
Solving SAN Problems
101
If You Can’t Mount a Volume on a Client
Try restarting the client computer, and then try again.
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Check that all Fibre Channel cables are plugged in.
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Make sure no other volumes are mounted on the client that have the same name as
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the Xsan volume.
If You Can’t Unmount a Volume on a Client
Make sure no processes are using the volume.
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Try restarting the client computer, and then try again.
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If RAID LUNs Aren’t Accessible over Fibre Channel
Try restarting the computer that doesn’t see the LUNs.
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Check the configuration of the Fibre Channel switch to be sure the SAN
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components are in the same Fibre Channel zone.
If You Have Problems Using Command-Line Tools
If you get the response “insufficient administrator privileges” when you run the
cvadmin
tool, make sure you have root user privileges when you use the tool. Log in as
the root user or use the
sudo
command to run the tool. For example:
$ sudo cvadmin
If a LUN Doesn’t Have as Much Space as Expected
To make striping across LUNs possible, Xsan adjusts LUN sizes to make LUNs in a
storage pool the same size as the smallest LUN in the pool. Xsan doesn’t use the extra
space on larger LUNs when you mix LUNs of different sizes in a storage pool.
If You Can’t Rename an Xsan Volume in the Finder
Xsan doesn’t let a mounted Xsan volume be renamed using the Finder. You can use
Xsan Admin to rename the volume. For instructions, see “Renaming a Volume” on
page 62.