[QUOTE="Arno Wagner said:
I noticed that one of the SMART attributes is a "Power On Hours Count".
Can HD manufacturers use this number to make their drives fail after a
certain number of hours (i.e. after warranty) is reached?
They could, but it would be illegal in many places. And it
is not like the evidence would be hard to obtain.
Shoddy manufacuting, bad QA, bad cooling (as Odie pints out
elsewere in this thread) are all acceptable. Deliberate,
planned destruction is not, unless the customer is told very
clearly when it will happen and what will happen. It may
still be illegal if there is no good technical reason for the
limited lifetime.
[/QUOTE]
For hardware to have a fixed and limited life, you would have to be
buying a licence to use the hardware, rather than purchasing the
hardware. In order to do buy a licence, you would have to agree to the
conditions, like you do before you use software like when you install
Microsoft software.
Mean Time Between Failure is just that, a mean, an average, so some will
get 50 percent of the mean time and some will get 150 per cent.
I have not had much experience of the purchase of mainframe hardware,
the only case I was close to, the company I worked for paid Honeywell
for an annual licence for the operating system and for the hardware. If
the fee had not been paid the hardware and operating system would have
ceased to work. This was however upfront and part of the original
purchase contract, and was therefore legal.