<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">You can’t do that, but you can force system to recognize hard drive as if it was 4Kn. Just like we do it for SSDs: <a href="http://wiki.illumos.org/display/illumos/List+of+sd-config-list+entries+for+Advanced-Format+drives" class="">http://wiki.illumos.org/display/illumos/List+of+sd-config-list+entries+for+Advanced-Format+drives</a><div class=""><br class=""></div><div class="">lp, Matej<div class=""><br class=""></div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 21 Mar 2016, at 06:00, Fred Liu <<a href="mailto:Fred_Liu@issi.com" class="">Fred_Liu@issi.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);"><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class="">So, you can “zpool create –o ashift=12” in illumos? I can’t do that in smartos at least….<o:p class=""></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=""><o:p class=""> </o:p></span></div><div style="border-style: none none none solid; border-left-color: blue; border-left-width: 1.5pt; padding: 0in 0in 0in 4pt;" class=""><div class=""><div style="border-style: solid none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; padding: 3pt 0in 0in;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><b class=""><span style="font-size: 10pt; font-family: Tahoma, sans-serif; color: windowtext;" class="">From:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif; color: windowtext;" class=""><span class="Apple-converted-space"> </span>Geoff Nordli [<a href="mailto:geoff.nordli@gmail.com" style="color: purple; text-decoration: underline;" class="">mailto:geoff.nordli@gmail.com</a>]<span class="Apple-converted-space"> </span><b class="">On Behalf Of<span class="Apple-converted-space"> </span></b>Geoff Nordli<br class=""><b class="">Sent:</b><span class="Apple-converted-space"> </span></span><span lang="ZH-CN" style="font-size: 10pt; font-family: 宋体; color: windowtext;" class="">星期一</span><span style="font-size: 10pt; font-family: Tahoma, sans-serif; color: windowtext;" class="">,<span class="Apple-converted-space"> </span></span><span lang="ZH-CN" style="font-size: 10pt; font-family: 宋体; color: windowtext;" class="">三月</span><span style="font-size: 10pt; font-family: Tahoma, sans-serif; color: windowtext;" class=""><span class="Apple-converted-space"> </span>21, 2016 10:59<br class=""><b class="">To:</b><span class="Apple-converted-space"> </span>Fred Liu; omnios-discuss<br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span><a href="mailto:zfs-discuss@list.zfsonlinux.org" style="color: purple; text-decoration: underline;" class="">zfs-discuss@list.zfsonlinux.org</a><br class=""><b class="">Subject:</b><span class="Apple-converted-space"> </span>Re: [OmniOS-discuss] 4kn or 512e with ashift=12<o:p class=""></o:p></span></div></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><br class=""><br class="">Hi Fred.<span class="Apple-converted-space"> </span><br class=""><br class="">Definitely, the ashift parameter has been around on the illumos for a couple of years. <span class="Apple-converted-space"> </span><br class=""><br class="">thanks,<br class=""><br class="">Geoff<span class="Apple-converted-space"> </span><br class=""><br class="">On 16-03-20 05:21 PM, Fred Liu wrote:<o:p class=""></o:p></div></div><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">The ashift parameter doesn't apply in illumos if my memory serves me well. It was introduced by ZoL.<o:p class=""></o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Thanks.<o:p class=""></o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class="">Fred<o:p class=""></o:p></div></div><div class=""><p class="MsoNormal" style="margin: 0in 0in 12pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><o:p class=""> </o:p></p><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><o:p class=""> </o:p></div></div><p class="MsoNormal" style="margin: 0in 0in 12pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><br class=""><br class=""><o:p class=""></o:p></p><div class=""><p class="MsoNormal" style="margin: 0in 0in 12pt; font-size: 12pt; font-family: 'Times New Roman', serif;">On Sun, Mar 20, 2016 at 1:37 PM -0700, "Geoff Nordli" <<a href="mailto:geoffn@gnaa.net" target="_blank" style="color: purple; text-decoration: underline;" class="">geoffn@gnaa.net</a>> wrote:<o:p class=""></o:p></p></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" class=""><span style="font-size: 10pt;" class="">Quick, question.<br class=""><br class="">Any performance differences between 4Kn and 512e with ashift=12?<br class=""><br class="">I am thinking there should not be, since they will both write the full<span class="Apple-converted-space"> </span><br class="">4K block size.<br class=""><br class="">The workload will be virtual machines using a zvol.<br class=""><br class="">thanks,<br class=""><br class="">Geoff<br class="">_______________________________________________<br class="">OmniOS-discuss mailing list<br class=""><a href="mailto:OmniOS-discuss@lists.omniti.com" style="color: purple; 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