Date: Fri, 22 Aug 2014 12:41:57 -0400 (EDT) From: Daniel Feenberg <feenberg@nber.org> To: RW <rwmaillists@googlemail.com> Cc: freebsd-questions@freebsd.org Subject: Re: solid state drives? Message-ID: <alpine.LRH.2.11.1408221239310.9489@nber2.nber.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 Fri, 22 Aug 2014, 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. I sort of understand that - but does the SSD have the ability to move unchanged data around to even out the wear? That is, if I fill the drive with 100GB of never changing files, and then write lots of frequently changing files to the last 20GB, does this put all the wear on a small portion of the drive, while most of the drive suffers no wear at all? Maybe I should do a full backup and restore once a year? Daniel Feenberg > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >
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