[Ma-linux] Re: [Novalug] Large and "small" media -- robustness?
Roger W. Broseus
Roger at just.net
Mon Mar 19 13:13:34 EDT 2007
There was some discussion on one of these lists some months ago about this
very topic. The short (small?) of it was that algorithms are used to avoid
over-writting the same locations on flash media because they have
limitations on the number of write-cycles. How many? I don't recall.
Definetly not forever.
One source says: Most Flash memories only guarantee a limited number of
erase and re-write cycles. Typical values are guaranteed cycles of 10,000
times. Most parts will work far longer - it's just not guaranteed. So if
your application counts on it - don't design it to do more than the
maximum numbers of erase cycles over the entire lifetime of the product.
Roger W. Broseus
> Dear colleagues,
> There has been a lot of discussion here recently about tera- and
> petabyte disks/arrays etc. My question is about the teency-weency
> I have a Sony usbstick, which cost me about $25 after the rebate,
> and which contains a mere gig. I tried to mount it this morning
> and had a fit; a horrid error message from the mount command!(I
> forget what it was). Well, I hurried to back up stuff on one of
> my Microcenter usbsticks(they cost only $15, and also contain a
> gig). And then my head cleared and I tried a fsck on the
> recalcitrant Sony. That worked, everything got straightened out,
> and I am, at least temporarily, happy.
> But what about the longevity of these flash storage sticks? does
> anyone have any horror stories? are there articles out there
> telling us what one can expect? I don't expect permanence; I'll
> put the usbstick stuff on CDs eventually, which I expect to last
> what remains of my life and a bit beyond. But I am really relying
> on these lovely little ciggybutts now, and I hope they don't suddenly
> give up the ghost . . .
> TIA for info and/or pointers to info.
>  "Teency-weency"???!! a gig??!! this codger has lived to see
> the day . . .
> Alan McConnell : http://patriot.net/users/alan
> There are many good Impeachment sites; one of the best is:
> Novalug mailing list
> Novalug at calypso.tux.org
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