FreeBSD on SSD

Wojciech Puchar wojtek at
Sun Jul 29 11:29:38 UTC 2012

> 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?

>> documented.
> Well, it is intended to be completely transparent.

transparency is one, documentation is another.
>> but does it clear SSD cache?
> That isn't guaranteed to clear any modern disk since they started using
> spare sectors

>> 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.

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