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Date:      Sat, 12 Feb 2011 20:04:32 +0300
From:      Odhiambo Washington <odhiambo@gmail.com>
To:        Frank Shute <frank@shute.org.uk>
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:  <AANLkTinuEFbaxkGGA6JGO8qBV77fr9VqbXV5FAOCiKA6@mail.gmail.com>
In-Reply-To: <20110212165419.GA55168@orange.esperance-linux.co.uk>
References:  <4D550415.8060105@ifdnrg.com> <20110211185738.GB45708@guilt.hydra> <AANLkTi=BZ1P5apMBhbQRTNJsDoAArdtxRpgdBA3wiHJ+@mail.gmail.com> <4D56799D.13036.2335C99A@dave.g8kbv.demon.co.uk> <AANLkTin+exaH5ORk9zAYsWoUzVtyCWcv3unpJRUK46FV@mail.gmail.com> <AANLkTi=AjHG5trQqOAHnVT4Ki9ORxF_ynm7MHsLiF_9h@mail.gmail.com> <20110212165419.GA55168@orange.esperance-linux.co.uk>

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On Sat, Feb 12, 2011 at 7:54 PM, Frank Shute <frank@shute.org.uk> wrote:

> 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
> >wrote:
> >
> > > 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
> (currently)
> > > > available SSD systems, it's only in the 10's of 1000's writes.
>  Pittiful
> > > > 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
> laptops
> > 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.
> >
> > Can someone please enlighten me on the dangers faced by those who opt to
> get
> > their laptops installed with SSDs?
> >
> > I personally have one, with a Toshiba 128GB SSD (THNS128GG4BAAA-NonFDE).
> I
> > am running Windows 7 on it.
> >
> > Should I stop and buy a SATA disk?:)
> >
>
> No you shouldn't but you should run FreeBSD on it ;)
>

With all the debate about FreeBSD this, FreeBSD that as regards SSDs, I am
not sure if I should so this:-)
I'll continue to run my FreeBSD servers on SATA-N..


>
> 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.
>
>
These people in the know always talk about the imminent failure of SSDs
soon:-)


-- 
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254733744121/+254722743223
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Damn!!



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