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Monday, March 30, 2009

Filed under: BusinessHardware

Data Rot

Chris Meyer | 03/30

Were you expecting your backups to last more than five years?

Well-known author David Pogue recently aired this interesting piece on “data rot” for his CBS Sunday Morning tech series, which has been transcribed for the New York Times web site. Aside from containing some interesting geek trivia and a renewed warning that DVD lifespans vary greatly (5 to 100 years, depending on the brand and storage conditions), the line that smacked me in the face was “well, hard disks only last five years, generally.” And that’s not Pogue saying it; that’s Dag Spicer at the Computer History Museum, who is trying to preserve these things.

I know a lot of people have migrated away from tape backups to hard drives stacked in a closet; I know I copied as many of our old Exabytes as I could read onto an external FireWire 400 drive (in addition to using redundant DVDs of more recent material). I’ve always worried about stored drives spinning up again and potential “sticktion” problems; this is the first time I’ve personally heard a time frame put on it by someone of authority. And as we know, FireWire 400 is getting dropped by some computers as well. It sounds like backing up data is no longer a save-and-forget-it exercise (not that it ever was), but instead a shell game we need to be playing constantly in order to keep backups up-to-date.

Regardless of media used, as we noted earlier still make two copies - just to be extra safe.

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This is the reason I recently added an LTO tape drive to my workflow.  Although the speedy connection which required a SCSI card, it is well worth it.  LTO 2, 3, and 4 are very inexpensive when you consider the alternative; lost data.

Posted by ThomasKoch  on  04/03  at  08:03 AM


Very good point. Sometimes people complain about the cost of doing good backup, and my reply is: how much would you pay to get back a lost project? How many hours would it save you?

thanks -
Chris

Posted by Chris Meyer  on  04/03  at  08:47 AM


Hey Chris, do you know if it’s better to keep drives spinning every once in a awhile, or can you let them sit for years?

Rich

Posted by .(JavaScript must be enabled to view this email address)  on  04/07  at  11:56 AM


I’ve heard that it’s better to spin them up every once in a while. Otherwise, you run the risk of some parts freezing into place.

Posted by Chris Meyer  on  04/07  at  04:29 PM


Gee - thanks again for adding more stress and worry to my life Chris! LOL!!

The cost of data recovery off of non-spinning disks is equivalent to the value of the material stored on them.

I once spilled a Big Gulp onto my Power Book about 9 years ago - totally hosing the unit fried the HD. I spent $1700 to Disk Savers to get the data off the HD which included a 3/4 completed book I was writing at the time and only had the first few chapters backed up at the time.

After losing tons of data over the years by outdated and failed media, I’m constantly dumping from drive to drive for redundant copies of my most precious data but still don’t have a very organized workflow for logging it like I should! I just have too much of it and not enough time to properly organize it I’m afraid.  :(

Jeff

Posted by Jeff Foster  on  04/07  at  05:17 PM


“DVD lifespans vary greatly (5 to 100 years, depending on the brand and storage conditions)”.  So…, what brands and storage conditions are more likely to yield a 100 year life?

Thanks.

Posted by .(JavaScript must be enabled to view this email address)  on  04/26  at  12:00 PM


That was discussed in the second link mentioned in the post:

http://provideocoalition.com/index.php/cmg_blogs/story/anything_worth_backing_up/

In short, people like Taiyo Yuden media.

- Chris

Posted by Chris Meyer  on  04/26  at  12:15 PM


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