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Date:      Sat, 12 Feb 2011 19:12:08 +0300
From:      Odhiambo Washington <odhiambo@gmail.com>
To:        Adam Vande More <amvandemore@gmail.com>
Cc:        Dave <dave@g8kbv.demon.co.uk>, freebsd-questions@freebsd.org
Subject:   Re: FreeBSD and SSD drives
Message-ID:  <AANLkTi=AjHG5trQqOAHnVT4Ki9ORxF_ynm7MHsLiF_9h@mail.gmail.com>
In-Reply-To: <AANLkTin+exaH5ORk9zAYsWoUzVtyCWcv3unpJRUK46FV@mail.gmail.com>
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>

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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?:)


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



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