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Date: Sun, 29 Jul 2012 18:47:51 +0700
From: Erich Dollansky <erichfreebsdlist@ovitrap.com>
To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
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Subject: Re: FreeBSD on SSD
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Hi,

On Sun, 29 Jul 2012 13:06:35 +0200 (CEST)
Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> wrote:

> > From what I've read the cache is divided into two part. One part
> > holds blocks that are consistently read during boot-ups. The other
> > part holds
> 
> how does it know when it is "bootup" and when it ends?

after a reset signal, it assumes that the machine restarts.

As the space is limited, it simply fills a fixed percentage with all
the reads after a reset.
> 
> >> documented.
> >
> > Well, it is intended to be completely transparent.
> 
> transparency is one, documentation is another.

Does it matter? It is a black box.

> >> but does it clear SSD cache?
> >
> > That isn't guaranteed to clear any modern disk since they started
> > using spare sectors
> so?
> 
So, no real difference.

> >> i don't think so. Someone sophisticated
> >> enough would perform raw read of cache chips and get cached data,
> >> which can actually be the most important part
> >
> > If you're that paranoid use geli, or don't sell.
> of course i use geli. and this is not a paranoia.

What then?

No Dobermann in the house?

Erich