The thing is, I can hear SOMETHING when I run "smartctl -H". But it's
so faint sometimes I wonder if it's "electrical buzz" as the interface
is powered up, accessed, powered down. There is some fair amount of
electrical buzz from my Powerbook when you rest your ear on it (as I
have been, to hear this).
Whatever "smartctl -H" is doing, it's much quieter than the "load cycle"
that happens every ~30 seconds. The noise produced by that operation is
several times louder.
I had stopped using my "fix" for a while, but noticed my load cycle
count go from 37K@... hours (97/100) to 49K@... hours (95/100).
Meanwhile the guy working next to me lost a 12-month old drive in a
laptop running a recent Redhat build. I re-enabled my fix. :)
Bruce Allen wrote:
> I think that there is no physical activity associated with '-H'. It
> just checks the attribute values against the pre-programmed
> thresholds. So I think you can advertise your script without worries.
> On Fri, 23 Jun 2006, Simon L. Sabato wrote:
>> To whom it may concern,
>> I upgraded my Powerbook G4 to a 120G Samsung HM120JC notebook drive a
>> month ago. I installed smartctl and started playing with it.
>> I noticed "Load Cycle Count" (attribute 225) going up every few
>> seconds. Some searching indicated controversy in this area, with some
>> OSs trashing the drive by writing every few seconds. This causes
>> constant park-unpark cycles. At my rate of 37K cycles / 225 hours, this
>> would extrapolate to a drive lifetime of 3650 hours (6 months @ 24
>> I noticed that running "smartctl" seemed to reset some counter in the
>> drive and avoid it parking. So I wrote an app that runs "smartctl -H
>> disk0" every N seconds (I use 2). It also runs "smartctl -a disk0" much
>> less often for logging reasons. This seems to have halted the increase
>> of load cycle count.
>> Now my question, before I start advertising what I've done -- is this
>> harmful to the drive? Does the health check cause any physical activity
>> in the drive? (CPU usage seems minimal, and the OS isn't reporting any
>> bytes/transactions to the drive).
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