4 ms·

They're rated for 2.5 million hours.

• Someone 10y ago
  Ballpark, that's 100,000 days or 300 years. So I guess that's MTBF, not "rated for", which gives even more the impression that we are talking about per-device lifetime expectancy. MTBF means that, in the expected lifetime of all devices combined, the expected time between failures is 2.5 million hours. So, if you buy 3000, one will have a failure within about a month (assuming expected lifetime is larger, but that is not stretching it) Also, MTBF says nothing about what happens outside the expected lifetime. If that is 10 years, whether they all break down on the first day of year 11 or somewhere between year 10 and year 100 doesn't affect MTBF. So, what do they expect the lifetime of these devices to be?
  • Freaky 10y ago
    Yes, it's MTBF, which is what the comment I was responding to asked for. The warranty is 5 years, and from the datasheet the AFR is rated at 0.35%. http://www.seagate.com/www-content/product-content/enterprise-hdd-fam/enterprise-capacity-3-5-hdd/enterprise-capacity-3-5-hdd/en-us/docs/100791104b.pdf http://www.seagate.com/www-content/product-content/enterpris...
    • Someone 10y ago
      Also note that that is "over a five year service life". So, they do not guarantee the helium to be still there after that. Given the nature of this stuff, it likely will slowly escape, but I guess professionals using these will want to retire them fairly soon afterwards.
      • Freaky 10y ago
        Does anyone guarantee anything about any hard disk after 5 years? :)