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Re: backup archive format saved to disk

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On 12/05/06 21:20, Ron Johnson wrote:
> On 12/05/06 19:33, Douglas Tutty wrote:
>>> On Tue, Dec 05, 2006 at 06:57:38PM -0600, Ron Johnson wrote:
>>>  > 
>>> The question is, if a block is sucessfully written now, if the drive is
>>> not used for 5 years then a read is attempted, is the drive able to
>>> retreive that data using ECC (as a tape drive could)?
> Mike is correct, disk drive blocks do have ECC.
> Remember, though, that drives are delicate mechanisms, and so the
> problem I see is the lubricating oil possibly thickening, and thus
> the drive not spinning up properly.  Hopefully the bad spin-up would
> not cause the r/w head to gouge the platter.  Otherwise, the data
> could still be retrieved, easily, for a price, from a data recovery
> company.

Forgot to mention: for important data, we make multiple copies of
the data, so if one of the tapes has too many errors for the EDAC to
handle, the other tape hopefully won't be bad.

I'd do the same thing with disks.

- --
Ron Johnson, Jr.
Jefferson LA  USA

Is "common sense" really valid?
For example, it is "common sense" to white-power racists that
whites are superior to blacks, and that those with brown skins
are mud people.
However, that "common sense" is obviously wrong.
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