On 24/01/2005, at 3:26 PM, Andrew Kohlsmith wrote:
On January 23, 2005 10:30 pm, Nick Bachmann wrote:HDDs don't fail because they lose power.Unless the heads crash, which can happen if power fails. I know HDD
manufacturers have done "head unloading" and such recently, but the risk
is still higher if power is suddenly lost during a write.
Why would the heads come in contact with the platters on a powerfail? The
arms are very rigid -- the heads only float a few thousandths of an inch over
the platters -- something that I don't believe has anything to do with the
platters spinning (that may *help* but I don't think the heads will contact
the platters if they're not spinning) and besides -- any drive manufactured
in the last 5 years will autopark on power fail... There's an awful lot of
energy stored up in the spindle motor that is used to slam the heads into the
parking zone...
Yet it is still a problem, and still happens. In fact, I've had three machines in the last three months. It was enough to convince the cusotmers that a UPS was indeed what they needed to protect their investment.
A UPS is a good investment. It protects hardware against anything going wrong, and allows for those rare, but painful blackouts that sometimes occur.
Andrew
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