[Soekris] Industrial grade CF durability
bunbun at kd85.com
Sun Mar 13 17:15:14 UTC 2005
On Sun, Mar 13, 2005 at 01:57:23PM +0000, Stuart Henderson wrote:
> >Stanislav wrote:
> >"Beware of the fact that the flashcards don't have unlimited
> >number of write cycles and that without a special setup
> >most filesystems do some writes even when you don't expect
> >them to (e.g. updating a timestamp a file was last accessed)."
> >I have done an installation on a 1gig card and it booted up perfectly in
> >the computer (not in a soekrisbox) I tried it on. I made a /var/log
> >partition with 300meg space and it seemed to work correctly.
> Modern flashcards are much much better than the older ones, see
while it's still good practice to mount certain partitions read-only
(because it's too easy for people to forget to halt a unix machine, pulling
the power plug from a Soekris is very easy to do) and to put scrap
partitions like /tmp on mfs, I have no problems in considering CF more
reliable than a harddisk with moving parts.
With garantees up to 2 milion cycles it makes sense to go for industrial
Unfortunatly, Sandisk has announced the end of life of it's line of
industrial grade products (still a couple of months to order them), so I'm
now looking for an alternative.
Transcend has a line of industrial CompactFlash cards, but it's hard
to compare the marketing lingo with that of Sandisk.
mentions Durability : >100,000 program/erase cycles
Comparing the Consumer Grade and Industrial grade Transcend, the following
differences stand out:
0. wider temperature range (0 to 70 versus -40 to 85 degrees Celcius)
1. ECC: 1 bit
2. higher shock resistance
The only thing relevant to 'our' application here is point 1. but I have
no clue how to compare the durability...
Does anybody have experience with alternatives than Sandisk Industrial Grade?
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