Re: [lopsa-tech] Data on longevity of powered off disk drives?

2014-12-05 Thread John Stoffel
> "Steve" == Steve VanDevender writes: Steve> Edward Ned Harvey (lopser) writes: >> So print the entire contents of every backup on paper and store the >> paper offsite in a waterproof, fireproof box. ;-) Steve> If you don't spring for the more expensive acid-free paper, Steve> though, you'

Re: [lopsa-tech] Data on longevity of powered off disk drives?

2014-12-05 Thread Andrew Hume
i have no experience with hard drives being stored unpowered for a long time and then re-energised. but i do have significant experience with tape. in particular, i have done exactly what jack talked about. that is, i wrote a few thousand tapes carefully (that is, i wrote them with application-lev

Re: [lopsa-tech] Data on longevity of powered off disk drives?

2014-12-05 Thread David Lang
On Thu, 4 Dec 2014, Bill Bogstad wrote: 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 on

Re: [lopsa-tech] Data on longevity of powered off disk drives?

2014-12-05 Thread Doug Hughes
On Fri, Dec 5, 2014 at 3:22 PM, Jack Coats wrote: > > > Archival grade DVDs seem to have a 50 year 'sure life'. Magnetic media > (thinking tapes, 5 years, and reel tapes need to be 'exercised' annually to > extend their lives). 'Flash' media like memory sticks need to be > 'refreshed' by pluggi

Re: [lopsa-tech] Data on longevity of powered off disk drives?

2014-12-05 Thread Jack Coats
Back in the early days of home computing (think '70s), Byte magazine pushed 'paper bytes'. A way to print bar codes on full sheets of paper that could be scanned back in easily (even by light pen, one bit at a time). Their idea (pre-internet) was to use it to allow publishing of both binary and s

Re: [lopsa-tech] Data on longevity of powered off disk drives?

2014-12-05 Thread Allan West
On 2014/12/04 21:28, Edward Ned Harvey (lopser) wrote: >> From: berg...@merctech.com [mailto:berg...@merctech.com] >> >> My biggest concern about the longevity of disk drives for off-line storage >> would be mechanical. A disk drive has a fair number of moving parts, >> which have been designed t

Re: [lopsa-tech] Data on longevity of powered off disk drives?

2014-12-05 Thread Bill Bogstad
On Thu, Dec 4, 2014 at 11:47 PM, Andrew Hume wrote: > 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 mi