[linux-lvm] Extend VG - Expand LUN vs New Disk

Jorge Fábregas jorge.fabregas at gmail.com
Mon Dec 21 12:30:29 UTC 2015

Hi everyone,

Are there any major differences between expanding an existing LUN
(already striped & mirrored on storage-array) and use pvresize &
"lvextend -r ..." vs adding a new disk to your VG when you need to
expand an existing filesystem?

At work we do the latter and almost everyone believes expanding an
existing LUN is not a safe operation.  Is there really a preferred
method? Or is it just a matter of personal preference?


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