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Re: tapes best for backup?

On Thu, Jan 03, 2008 at 09:56:19PM -0600, Ron Johnson wrote:
> On 01/03/08 20:30, Douglas A. Tutty wrote:
> > One of the threads over at misc@openbsd.org has gone OT (for them) into
> > discussing backup media.  The concensus there seems to be that tape
> > (e.g. DLT) is still the best for long-term storage (e.g. archives)
> Do "they" even make new DLT 8000 drives anymore?  We are happy with
> SuperDLT2 drives, but are transitioning to LTO3.
> > because CD/DVDs fade rather quickly while hard drives get "bit rot" over the
> > years and since they're not being run frequently you don't see error
> > messages appearing.  
> > 
> > I'm wondering what people here on DU use.  Lets say the archive size is
> > 7 GB.  It could fit on one DVD; one(?) or two USB sticks, SD cards, etc;
> 7GB?  That was a lot in 1992, when DLT-III was king, but now DLT IV
> is ancient, and 7GB is -- bluntly -- chickenfeed.

Right.  What about things of great sentimental value?  E.g. family
photos?  What about financial records?  Sure 7 GB is chickenfeed.  It
fits on one DVD.  However, to put that on the shelf, what to use to make
it last?  

> > an old spare hard drive or a new dedicated hard drive in (presumably) an
> > external (USB, firewire, eSATA?) case.
> > 
> > Do people still use tape?  I note that the drive prices for used drives
> > on eBay are quite low but then most (?) would need to add the
> > appropriate scsi card since I doubt they would be SATA compatible.
> What kind?  DLT8000 drives have been around now for 15 years
> > Other than rsyncing to another box, what do people use for
> > put-it-on-the-shelf archiving?
> How important is the data?  Personal or commercial?
> If a reputable archival company like Iron Mountain offers on-line
> storage, then I'd encrypt it and drop it on their servers.

So how do they store it?  If they're just going to drop it onto a hard
drive and forget about it, how is that different than me putting it on 2
hard drives: one on a backup server that runs so that hard drive errors
show up; one in an external case that gets a fresh backup put on it
every month or so and goes to the bank's safety deposit box?  Or, if
they're just going to archive it in a tape library, how is that
different than me putting it on a tape and putting that in the bank?


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