Marge,

Take a look at Knowledge Base article KB4998 on the NOW site. It has all the information you need to decide when and how to defragment volumes and LUNS. In a nutshell, use Windows utilities to defragment a NTFS LUN and use reallocate (ONTAP 7) or wafl scan reallocate (ONTAP 6.x and earlier) for volumes and files.

Michael Cope NetApp Professional Services Engineer mcope@NetApp.com

Simplifying Data Storage Management

-----Original Message----- From: margesimpson@hushmail.com [mailto:margesimpson@hushmail.com] Sent: Thursday, July 13, 2006 7:14 PM To: toasters@mathworks.com Subject: Defragmenation Question on Filer after few GB deletion.

Hi all: Could tech gurus respond to this question: I am planning to clean up some space on the filer - say 10GB.

Since WAFL FS is intellegent minimizing the defrag issues, what happens on deletion of the files on my volume? If I delete 10GB of 50GB, will the FS still be fragmented, or WAFL does it auto when files are deleted? Do I will have to run defrag tools explicitly?

Thank you for your reply. Marge.

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