IIRC one of the US ICBM's had something like a 250 Kb hard disk, head/track; all in a rather sturdy case about 5" in dia. But that was a few years ago to I can't attest to the accuracy of my memory.
Dave On 12/04/2014 12:05 AM, Peter Blodow wrote: > Am 04.12.2014 04:02, schrieb Jon Elson: >> /snip >> Yes, of course, various manufacturers test all sorts of >> stuff! But, these PUBLISHED >> MTBF numbers all seem to come from the old DESC scheme. >> When they show >> 250K hours MTBF for a hard disk drive, you KNOW they are >> using this methodology. >> Anybody know of a hard disk drive that will run for a >> continuous 28 YEARS? >> NOT very likely. >> > At the company I was working for, I had a building management system > installed (don't want to mention the brand, sounded like Siemens) around > 1980. The central processor unit contained a hard disk drive with a - > nowadays - ridiculous sounding capacity of, say, 100 kbyte. There was > one aluminium disk of about 30 cm diameter inside, we could see it > turning through the plexiglas cover. The device was the size of a large > drawer, weighing about 50 kg, and ran continously without failure (and > without back up system) up until we switched it all off to make room for > a more modern system. The disk made it more than 30 years without > repairs. The new system is PC based and the computers must be replaced > about every two or three years. > > Peter > > --- > Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. > http://www.avast.com > > > ------------------------------------------------------------------------------ > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server > from Actuate! Instantly Supercharge Your Business Reports and Dashboards > with Interactivity, Sharing, Native Excel Exports, App Integration & more > Get technology previously reserved for billion-dollar corporations, FREE > http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
