Date: Fri, 22 Aug 2014 17:34:52 +0100 From: Arthur Chance <freebsd@qeng-ho.org> To: RW <rwmaillists@googlemail.com>, freebsd-questions@freebsd.org Subject: Re: solid state drives? Message-ID: <53F7712C.5080807@qeng-ho.org> In-Reply-To: <20140822170112.69830ad9@gumby.homeunix.com> References: <53F22E89.3050005@rcn.com> <53F2399D.5050609@hiwaay.net> <20140822170112.69830ad9@gumby.homeunix.com>
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On 22/08/2014 17:01, RW wrote: > On Mon, 18 Aug 2014 12:36:29 -0500 > William A. Mahaffey III wrote: > > >> None of the SSD's are/will be as durable as spinning drives for >> writes .... That said, the SLC type are more durable than MLC or >> TLC .... Also more $$$$ & usually only available in smaller sizes. >> Good for a root drive, i.e. mostly read-olny operations. Swap & >> everything else on spinning platters .... > > A typical modern 120GB MLC SSD will have a specified write endurance of > around 8TB which is equivalent to 1GB a day for 22 years. They should > be fine for most things where there's nothing doing heavy duty writing. The stated write endurances appear to be very conservative as well. The Tech Report web site has been hammering a variety of SSDs and only started getting actual failures after the 600TB mark, with some still working after 1PB of writes. http://techreport.com/review/26523/the-ssd-endurance-experiment-casualties-on-the-way-to-a-petabyte YMMV of course.
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