Date: Thu, 31 May 2012 06:57:19 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Victor Sudakov <vas@mpeks.tomsk.su> Cc: freebsd-questions@freebsd.org Subject: Re: 9.0 on SSD Message-ID: <alpine.BSF.2.00.1205310652350.81499@wonkity.com> In-Reply-To: <20120531025206.GA11699@admin.sibptus.tomsk.ru> References: <20120531025206.GA11699@admin.sibptus.tomsk.ru>
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On Thu, 31 May 2012, Victor Sudakov wrote: > Colleagues, > > I have installed 9.0-RELEASE on a SSD drive with the following > tweaking so far: > > 1. tmpmfs="YES" (WRKDIRPREFIX etc will go there too). > > 2. mount -o noatime > > 3. tunefs -t enable > > I have not done any tricky partition alignment, do I really need to? Is > anything else advisable? If it's not aligned, there can be a pretty significant performance drop. Please show the output of 'gpart show' on that drive if it's GPT (gpart show ada0) or drive and slice if it's MBR/bsdlabel (gpart show ada0 && gpart show ada0s1). > There is one thing that worries me, why is TRIM not shown as enabled in > camcontrol output? > > [root@vas ~] tunefs -p /dev/ada0p2 | & grep -i trim > tunefs: trim: (-t) enabled > [root@vas ~] camcontrol identify ada0 | egrep '^Fea|TRIM' > Feature Support Enabled Value Vendor > data set management (TRIM) yes > [root@vas ~] I think that no value there means it cannot be enabled or disabled; it's always on.
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