Date: Sat, 12 Feb 2011 16:54:19 +0000 From: Frank Shute <frank@shute.org.uk> To: Odhiambo Washington <odhiambo@gmail.com> Cc: Adam Vande More <amvandemore@gmail.com>, Dave <dave@g8kbv.demon.co.uk>, freebsd-questions@freebsd.org Subject: Re: FreeBSD and SSD drives Message-ID: <20110212165419.GA55168@orange.esperance-linux.co.uk> In-Reply-To: <AANLkTi=AjHG5trQqOAHnVT4Ki9ORxF_ynm7MHsLiF_9h@mail.gmail.com> References: <4D550415.8060105@ifdnrg.com> <20110211185738.GB45708@guilt.hydra> <AANLkTi=BZ1P5apMBhbQRTNJsDoAArdtxRpgdBA3wiHJ%2B@mail.gmail.com> <4D56799D.13036.2335C99A@dave.g8kbv.demon.co.uk> <AANLkTin%2BexaH5ORk9zAYsWoUzVtyCWcv3unpJRUK46FV@mail.gmail.com> <AANLkTi=AjHG5trQqOAHnVT4Ki9ORxF_ynm7MHsLiF_9h@mail.gmail.com>
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--fUYQa+Pmc3FrFX/N Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Feb 12, 2011 at 07:12:08PM +0300, Odhiambo Washington wrote: > > On Sat, Feb 12, 2011 at 6:50 PM, Adam Vande More <amvandemore@gmail.com>w= rote: >=20 > > On Sat, Feb 12, 2011 at 6:14 AM, Dave <dave@g8kbv.demon.co.uk> wrote: > > > > > Define "a *lot*". If you look up the spec's on the common (currentl= y) > > > available SSD systems, it's only in the 10's of 1000's writes. Pitti= ful > > > compared to magnetic media. > > > > > > > Chances are on many setups, by the time you've written enough data to > > significantly wear out the drive your magnetic media would died of > > mechanical failure long before. Purchase what you need MLC/SLC. > > > > > > > The way they work too, if you write one "sector" you actualy re-write= a > > > much larger block of memory. > > > > > > Depends on full setup, the write amplification effect on the X-25's is > > about > > 1.1x. Recent SSD's all are much more efficient compared to when these = were > > large, legitimate concerns. > > > > > > > Wear leveling, not that common with SSD > > > Hard Drives, but very common with USB (Flash) memory sticks, > > > > > > > Completely wrong even the first gen modern SSD's had wear leveling built > > in. > > > > > > > SSD's have a place, but not for things like swapfiles or working data > > > that changes a lot.. > > > > > > > I guess ZIL's wouldn't be a good use for such devices either. Perhaps = you > > can inform FS designers that they are doing it wrong. > > > > > While my tech mind cannot comprehend all these arguments, there are lapto= ps > which come with SSD as primary drives and are running Windows or even > Apple's OS X. > I fail to understand why manufacturers would let people install SSDs on > machines when their life is so much in question. >=20 > Can someone please enlighten me on the dangers faced by those who opt to = get > their laptops installed with SSDs? >=20 > I personally have one, with a Toshiba 128GB SSD (THNS128GG4BAAA-NonFDE). I > am running Windows 7 on it. >=20 > Should I stop and buy a SATA disk?:) >=20 No you shouldn't but you should run FreeBSD on it ;) There's a lot of FUD talked about SSDs. All I know is that I've been using one in my workstation for coming up to a year with no problems so far. Take it from a mechanical engineer that SSDs are much more robust than HDDs, which is one reason they (HDDs) are going the way of the dodo. I recommend that people should use SSDs for their workstations. Makes a big difference in performance and makes the computer much more pleasant to work on. Regards, --=20 Frank Contact info: http://www.shute.org.uk/misc/contact.html --fUYQa+Pmc3FrFX/N Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (FreeBSD) iEYEARECAAYFAk1WuzoACgkQHduKvUAgeK46yACfRMVALME50IaSj8M7ZfHNmPgQ WTMAn15GAfFoOofVS8GkDT4tuio5OdRX =/BZZ -----END PGP SIGNATURE----- --fUYQa+Pmc3FrFX/N--
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