topic Re: chkdsk on SAN LUN is it recommended and what will be the impact on data . in Network and Storage Protocols https://community.netapp.com/t5/Network-and-Storage-Protocols/chkdsk-on-SAN-LUN-is-it-recommended-and-what-will-be-the-impact-on-data/m-p/15609#M1437 <HTML><HEAD></HEAD><BODY><DIV><P>Chkdsk is not defrag. I would not recommend defrag unless there is a very specific work load that needs to be optimized.</P><P></P><P>WAFL writes data to disk in a way that the host never sees and also does all the hard work making reads and writes faster with cache and even flash.</P><P></P><P>About the only reason I can think of to defrag on netapp is preparing to shrink a lun on a platform with no snap drive support or native filesystem shrink feature.</P></DIV></BODY></HTML> Sun, 06 Oct 2013 19:24:07 GMT CHRIS_K_AU 2013-10-06T19:24:07Z chkdsk on SAN LUN is it recommended and what will be the impact on data . https://community.netapp.com/t5/Network-and-Storage-Protocols/chkdsk-on-SAN-LUN-is-it-recommended-and-what-will-be-the-impact-on-data/m-p/15604#M1436 <HTML><HEAD></HEAD><BODY><P>I have query from customer they want to run defragmentation on SAN LUN .</P><P>What are options available .</P></BODY></HTML> Thu, 05 Jun 2025 05:52:34 GMT https://community.netapp.com/t5/Network-and-Storage-Protocols/chkdsk-on-SAN-LUN-is-it-recommended-and-what-will-be-the-impact-on-data/m-p/15604#M1436 SANTOSH_DEV 2025-06-05T05:52:34Z Re: chkdsk on SAN LUN is it recommended and what will be the impact on data . https://community.netapp.com/t5/Network-and-Storage-Protocols/chkdsk-on-SAN-LUN-is-it-recommended-and-what-will-be-the-impact-on-data/m-p/15609#M1437 <HTML><HEAD></HEAD><BODY><DIV><P>Chkdsk is not defrag. I would not recommend defrag unless there is a very specific work load that needs to be optimized.</P><P></P><P>WAFL writes data to disk in a way that the host never sees and also does all the hard work making reads and writes faster with cache and even flash.</P><P></P><P>About the only reason I can think of to defrag on netapp is preparing to shrink a lun on a platform with no snap drive support or native filesystem shrink feature.</P></DIV></BODY></HTML> Sun, 06 Oct 2013 19:24:07 GMT https://community.netapp.com/t5/Network-and-Storage-Protocols/chkdsk-on-SAN-LUN-is-it-recommended-and-what-will-be-the-impact-on-data/m-p/15609#M1437 CHRIS_K_AU 2013-10-06T19:24:07Z