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Date:      Sat, 28 Jul 2012 19:26:28 +0200
From:      Polytropon <freebsd@edvax.de>
To:        Vladimir Videscu <vladimir.videscu@gmail.com>
Cc:        questions@freebsd.org
Subject:   Re: FreeBSD on SSD
Message-ID:  <20120728192628.83bb8e62.freebsd@edvax.de>
In-Reply-To: <CAMxhPysfghi-0ufy0OU0nonqha5mFeRacPVXM0MBDe6fqxmjUg@mail.gmail.com>
References:  <CAMxhPyt-gF228nX0DNrdsFVXKVx6YjZVa7obfov5vf+dtV71zw@mail.gmail.com> <alpine.BSF.2.00.1207281229260.6801@wojtek.tensor.gdynia.pl> <CAKB6gVgEyvVYaUvLkvE_AU-aViJxHAiLu6drcodLjOOBeNEYLg@mail.gmail.com> <CAMxhPysfghi-0ufy0OU0nonqha5mFeRacPVXM0MBDe6fqxmjUg@mail.gmail.com>

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On Sat, 28 Jul 2012 20:19:25 +0300, Vladimir Videscu wrote:
> Seeing as the HDD only has a SATA connector, this would mean that the SSD
> part already has a memory control device that regulates access to that
> sector, whether it is a plain read-cache or not. This would imply that
> FreeBSD could communicate with the HDD normally, through the SATA
> connector, just like any regular HDD.
> 
> Based on that sequence of thought, and the fact that on the System
> Requirements page of FreeBSD it says :
> *
>    *   "*4.4.1.* What kind of hard drives does FreeBSD support?
>                  FreeBSD supports EIDE, SATA [...]",
> 
> am I right to assume that there should be no incompatibility or conflict
> between the OS and the  drive ?

I don't think you'll experience any problems. According to the
documentation on the Seagate web page (which I mentioned in my
previous message), the drive "talks to" the system like any
other SATA drive. The fact that it uses an internally controlled
SSD for caching (including management of that disk by the disk's
firmware!) does not make any difference to the operating system.
Even the 512/4k sectoring would be no problem.

You're going to install FreeBSD as on any other hard disk. You
will then (hopefully) see a speed gain when in use. :-)



-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...



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