Paperkey 1.3

Mark H. Wood mwood at IUPUI.Edu
Mon Jan 7 16:39:12 CET 2013

On Fri, Jan 04, 2013 at 02:30:43PM -0500, David Shaw wrote:
> On Jan 4, 2013, at 9:27 AM, Johan Wevers <johanw at> wrote:
> > On 04-01-2013 5:42, David Shaw wrote:
> > 
> >> Paperkey 1.3 is released.
> > 
> > You might want to update the website, it reads a bit outdated.
> > CD/DVD-ROMs are going the way of the floppy disc; flash memory is much
> > more reliable than either. Future support of USB ports or memory card
> > readers seems the biggest concern for me.
> That's a very good point.  Do you know of any studies on the projected life of flash when used as backup?  I've read anecdotal numbers as low as 5 years, and marketing claims are always huge (100 years!), but most of what I see is about the lifespan is when the flash is actively used (so running out of read/write cycles), rather than the on-the-shelf lifespan of already written data.

I'd suggest assuming some periodic read-only use, since we *should* be
testing our backups regularly to discover decay *before* it makes
something irretrievable.

Mark H. Wood, Lead System Programmer   mwood at IUPUI.Edu
There's an app for that:  your browser
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