I don't know of any media-level lifespan. Magnetic media does have a data retention rating (i.e., how long will it retain retrievable data on the shelf), but so does NAND. However, the read/write endurance of hard media is certainly greater than the mechanicals that support it.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Steve Tomporowski Sent: Saturday, November 2, 2013 7:31 PM To: [email protected] Subject: Re: [H] SSD Endurance Experiement on The Tech Report I wonder what's the rating for the magnetic media. It may be expressed in different terms, but if it could be compared, people would be shocked how 'low' it was. Although the media may be rated to outlast the mechanicals. On 11/2/2013 7:36 PM, Greg Sevart wrote: > I'm happy to see these sorts of tests getting more attention. There's > been a tremendous about of FUD spread about SSD wearout. Under typical > usage scenarios, the SSD will be obsolete years, or even decades, > before the NAND itself will have worn out. Hardware.info did a test of > two 250GB Samsung 840's as well, and they lasted over 3200 P/E cycles > for over 750TB of writes. These are the (presently) one-of-a-kind TLC > drives that are estimated to be rated for 1000 cycles. If the P/E > ratings were accurate, they'd already have a tremendously long useful > life--but the ratings are ultra conservative. Given a 10GB/day usage > scenario (a high estimate for most users) and a write amplification > factor of 3, those drives would last for ~80 years based on tested > endurance, or ~25 years based on the "guaranteed" spec. I know there > are some that like to hold on to old tech, but I suspect even Duncan > would have retired the drive before then. :) > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Steve > Tomporowski > Sent: Saturday, November 2, 2013 7:55 AM > To: [email protected] > Subject: [H] SSD Endurance Experiement on The Tech Report > > http://techreport.com/review/25559/the-ssd-endurance-experiment-200tb- > update > > I don't know if anyone has been following this experiment, but after > 200TB of writes, even the weakest SSD (Samsung 840, which is what I > have) is still going strong. > >
