Xsan extend volume problem with total free space

Chanmax07's picture


I have an xsan with 2 mdc (mountain lion) with 1 eclass promise and 1 jclass and 2 volumes.

Recently I need to add space and more bandwitch.

I add 1 e class and 1 j class to my fabric swicth with four lun.

I extend the first volume in my san. After that my volume is up to 32To.

The free space of the volume is wrong. I see in xsan admin 9To of free space but I have only 9To of data in my volumes.

I think the extension of volume create a mirror of my lun.

Do you confirm that ? And what si the method to expand a volume with new contrĂ´ler and more space

King regards<

matx's picture

Free space reported can be wrong if the volume is fragmented and/or extremely full then expanded.

See this Kbase:


Xsan: Available free space incorrect on heavily fragmented volumes

On an Xsan volume with heavy free space fragmentation, the available free space may be less than expected.

Chanmax07's picture

Thanks for your help,

I will test that next week. If the operation will be ok I put solved for this post.

Kind regards