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Dell Compellent Confidential HP-UX Best Practices 11i v2 and 11i v1

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Dynamic LUN Contraction (DLC) and Thoughts

With HP-UX 11i v2 (and the patch PHCO_35524 or later), the “vgmodify” command DOES NOT provide a

“-C” parameter for the resizing of a PV (Physical Volume). Any LUN (PV), Logical Volume or Volume

Group reduction effort will need to be performed in a completely OFFLINE mode. The procedures to

achieve this are outside the scope of this document; kindly refer to the HP Support Center for further

instructions and/or assistance.

It is strongly recommended as a manner of best practice to capture and maintain a known

good backup copy of your data PRIOR to performing any LV/PV reduction procedures. The

procedures to achieve this are outside the scope of this document; refer to the HP Support Center for

further instructions and/or assistance.

It is also to be noted, that the Dell Compellent Storage Center does not presently support

(nor provide the facility to perform) the reduction of LUN sizing on the Dell Compellent

Storage Center. It is recommend that any data migration or relocation efforts be performed by

presenting a secondary (and smaller) LUN to the target host, prepping the LUN for LVM use and

relocating the data via OS-based tools (pvmove, tar, dd etc.); thereafter retiring and reclaiming the

larger and unused LUN. The procedures to achieve this are outside the scope of this document; refer to

the HP Support Center for further instructions and/or assistance.

With HP-UX 11i v1 and older, HP does not provide tools or support nor facilities to

accommodate online DLE/DLC. Any LUN (PV), Logical Volume or Volume Group

expansion/reduction effort will need to be performed in a completely OFFLINE mode. The procedures

to achieve this are outside the scope of this document; kindly refer to the HP Support Center for

further instructions and/or assistance.

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Seagate ST318404LC Guida Utente Pagina 26