thats not relevant here.
the issue you really mean is the interface,
and it will likely be safe that scsi/sata will still be around.
i would be more doubtful that USB-2 would still be around,
but its still pretty likely.
firewire might be more doubtful, but the jury is still out on that.
andrew
On Dec 4, 2014, at 2:36 PM, Michael D. Parker <[email protected]> wrote:
> I think that a bigger problem might be the quickly changing disk technology
> and having to maintain possibly obsolete hardware that could read the disks
> in the future if need be.
>
> +++++++++++++++++++++++++++++++++
>
> Michael D. Parker
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On
> Behalf Of Bill Bogstad
> Sent: Thursday, December 04, 2014 5:19 AM
> To: Edward Ned Harvey (lopser)
> Cc: [email protected]
> Subject: Re: [lopsa-tech] Data on longevity of powered off disk drives?
>
> On Thu, Dec 4, 2014 at 1:06 PM, Edward Ned Harvey (lopser)
> <[email protected]> wrote:
>>> From: [email protected]
>>> [mailto:[email protected]]
>>> On Behalf Of Bill Bogstad
>>>
>>> Not sure if my previous (subject only) note made to the list or not,
>>> but the subject line pretty much says it all anyway. Although, it
>>> should not matter for answering my question, my motivation is to get
>>> some idea of the feasibility of treating disk drives the same
>>> way as tape cartridges. i.e. Leaving them on a shelf for extended
>>> periods of time and then expecting to retrieve data from them.
>>> While there have been public studies in recent years on the lifespan
>>> of powered disk drives, I can not find anything other then anecdotal
>>> comments about unpowered drives.
>>
>> [lots of good thoughts on redundant copies, everything decays, etc.]
>>
>> Unfortunately I don't have performance statistics for hard drive media...
> Which is what I think you're actually seeking...
>
> Yeah, that really is what I want. Without performance statistics, it
> is impossible to
> know if I would need to keep copies on one or ten unpowered disks.
> Should I copy the data to new "media" every year or every decade?
> I'm guessing that no one has tried to use disks this way so there isn't
> going to be any real world data out there. I suppose even idle speculation
> by someone who worked in the drive manufacturing or data
> recovery industry would be of interest. For example, I don't have
> the physic background to even intelligently guess if individual magnetic
> regions/domains on a drive platter will degrade their neighbors over time,
> but someone else might. Admittedly, this is only one part of whether an
> entire drive will remain readable; but it might put a useful ceiling on the
> maximum longevity of an unpowered drive.
>
> Bill Bogstad
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-----------------------
Andrew Hume
949-707-1964 (VO)
[email protected]
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