[aklug] Re: SSDs

I did not know that. Hmmm... The longest I've ever had my PIII powered off
was probably 6 weeks when I was burning in my eeepc. And it powered up
nicely with it's handful of razor sharp console apps. :)

This is good stuff for my next major project-a Raspberry Pi (just received
mine last month-yay!) file server. Low power and affordability being the
screaming monkey, as my homestead is off the grid and it's primary power
will come from a (ahem) 12 volt system. SSD (or the poor mans SSD) is on
the wishlist.

I'll see what I can find. Also they have a power-saving script on the #!
forums (meant for laptops) that I just know will work nicely for a
power-meager debian powered file server:

http://crunchbanglinux.org/forums/topic/11954

Thanks for the info!

On Thu, Oct 25, 2012 at 5:29 AM, Christopher Howard <
christopher.howard@frigidcode.com> wrote:

> I'm up late (can't sleep - stupid work nightmares again :-) and happened
> to be doing some research trying to resolve a question in my mind about
> SD Card archival life. I.e., the issue of how well SD cards work for
> long term storage of data when the card is left in a powered off state
> for long periods of time. Due to the fact that SD cards are based on
> flash memory (NAND Flash, I think) data is stored by trapping charge,
> and eventually that charge leaks out. (Or, at least, that's what people
> keep telling me.) So, for example, if you stuck an SD card in a drawer
> for ten years and tried to read it again, the data might have vanished
> away.
>
> Thought it might be worth bringing up this point of discussion for SSD
> as well, as (from the little I understand) they are based on similar
> technology (flash memory). If your drive was left in a powered off state
> for a long period of time (really long vacation...? coma...? computer
> left in the attic...?) the data would dissipate in the above mentioned
> manner.
>
> http://hardforum.com/showthread.php?t=1502663
>
> The above link is a bit old (2 years) but indicated two interesting points:
>
> 1) SSD keeps data fresh by moving it around in memory regularly
> according to some algorithm. (In short, the SSD is purposely wearing
> itself out in order to keep your data alive.)
>
> 2) Some SSD designs ideas might purposely cut down on the archival life
> of the drive considerably, in order to attain faster data access speeds.
>
> I just thought I'd mention that for the sake of discussion. Haven't done
> the research yet to give any up-to-date or reliable conclusions.
>
> --
> frigidcode.com
> indicium.us
>
>

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