<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body text="#000000" bgcolor="#FFFFFF"> On 09/27/2017 12:41 PM, nitin chandra wrote: <blockquote type="cite" cite="mid:CAFSKaexd79vS8=hqZAS9fuU9yEXQe=15CKwf28GmQ4VMpeuNyg@mail.gmail.com"> <pre wrap="">Do I need to format the (data) partition before creating a ZFS pool ? </pre> </blockquote> If you want to go zfs, then do it now. Are you planning a mirror? There may be other ways of doing it but to create my raidz2 arrays, I add blank drives that are set with GPT partition types to the raid, and then "<span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">Create the desired hierarchy." </body> </html>