Mailinglist Archive: opensuse (686 mails)

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Re: [opensuse] Added INFO, SSD tuning; was: SSD and smartctl: Percentage ...
On Sun, 7 Jul 2013 19:46:36 +0200 (CEST)
"Carlos E. R." <robin.listas@xxxxxxxxxxxxxx> wrote:

And where is that metadata stored, in flash, too? Fecause it will
wear out faster, and I think that this part can not be remapped
itself.

Why not?

Because it was declared holly and no one should touch it :)
It is not firmware that might have certain entry point that is
hard-coded in a CPU. It is just a table that is referenced from
firmware which is in a flash memory and can be changed when table is
moved elsewhere.

It would have to be some other type of memory, cmos ram
perhaps, which could be written on flash periodically or on power
down. Just a wild guess.

It is used flash to hold data when power is not present, but it is
different type of flash that can survive 100,000 P/E cycles, unlike
3000-5000 for the rest of the disk.

Some use cache that is RAM with just enough energy backup to allow
transfer to flash when outside power source is shut down. Some probably
use both, RAM and more durable flash. What option is used depends
entirely on price of particular solution at certain point in time.

Time for a whole new energy storage concepts, with capacity that is
many time higher then current, is coming.

--
Regards, Rajko.
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