Auto Release Free Space

[ITTONN]

Hello expert,

Previously, a LUN is used by 50GB by guest OS. Now we delete some unused files on OS based on this LUN. (In guest OS, it only use 10GB)

However, when we look back to 3PAR on the used space of this LUN, it is still 50GB.

Can you tell us how to release those unused free space to let 3PAR show only 10GB is used.

Thanks & Best Regards,

Tong Ning

[Sheldon Smith · Accepted solution]

The guest OS needs to inform the array the deleted space can be reclaimed.

The reclamation process depends on the guest OS. See the technical paper "HP 3PAR Thin Technologies" (4AA3-8987ENW, June 2014, Rev. 4) for the appropriate section (Thin Reclamation for <specific OS>) starting on page 27:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CB4QFjAA&url=http%3A%2F%2Fwww8.hp.com%2Fh20195%2Fv2%2FGetDocument.aspx%3Fdocname%3D4AA3-8987ENW&ei=Tkj7U6TWGMH6iwLnzIDABw&usg=AFQjCNGaXIqEFxlkZQNOrzU2lVvRWVdheQ&sig2=4t_116_j80931oQH4C6VVQ&bvm=bv.73612305,d.cGE&cad=rja

Note: While I work for HP, all of my comments (whether noted or not), are my own and are not any official representation of the company.
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[ITTONN]

Hello Smith,

Wonderful answer, thanks very much!

Best Regards,

Tong Ning