Re: Corrupt Master File Table
- From: Johnny B Good <jcs.computersbutt@xxxxxxxxxxxxxxxx>
- Date: Sun, 9 Jul 2006 10:54:33 +0100
The message <H88ybAFrcLsEFw4Q@xxxxxxxxxxxxx>
from Mike Tomlinson <mike@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> contains these words:
In article <4hbjl5F1qejn8U1@xxxxxxxxxxxxxx>, Gaz <gazter@xxxxxxx> writes
Are you suggesting that all modern hard drives need to have fans blowing
cold air over them when the temp in the case is no more then 20 to 30
degrees C?
Not all, but most, yes, and the air doesn't need to be cold - the drive
just needs some air flowing over it. Doesn't need to be a lot.
I concur. In my case[1], the MoBo 'system temp' sensor is showing 34
deg[2] whilst Dtemp claims _both_ WD 320GB SATA drives are at 32 deg[3]
for an ambient of 22.9 deg (CPU at 40.5 deg idle after some 17 hours up
time - so stable conditions :-).
The
maxtor drive is in a cd drive slot suspended by a 5 1/4 to 3 1/2 inch
metal
case, the metal case is quite mininmal, and suspends the drive in a well
ventilated position,with nothing but air above and nothing but air
below, it
still gets to hot to touch.
You just need to get some air circulation going in the external drive
bay area.
Not good. Download a SMART utility and see what the drive itself thinks
its temperature is.
Or use DTemp[3]
[1] The 80mm PSU fan (no grillwork at all to impede flow) is the sole
prime mover of air through the case. This recieves a small boost from
the CPU fan which sucks the case air through the cpu heatsink and dumps
its warm exhaust straight into the PSU interior vent slots, thus neatly
eliminating the 'Hot Air Recirculation' effect (or a good 80 to 90% of
such).
The MoBo 'system' sensor is located in the corner of the MoBo that is
bottom rear of the tower case and away from the natural flow of incoming
air (fitting a 7volted intake fan merely reduced the 'system' sensor
reading by 4 deg making no discernable effect on the CPU temp - the true
indicator of the efficacy of such an exercise in case cooling - hence
the removal of that intake fan).
Fitting a '7 volted' slimline 60mm ex heatsink fan within the case to
direct air over the (now seperated) hard drives provided a good 4 deg
drop in temps for no discernable noise penalty (unlike the 7 volted 80mm
intake fan experiment).
[2] This sensor simply reflects temperature due to heat conduction from
whatever components happen to be local to this sensor on the MoBo
(typically some 5 to 10 deg above the local ambient temperature).
[3] I discovered the hard way that DTemp uses the sensor data from only
the first drive to indicate temps for a two sata drive setup (VIA sata
chipset, at any rate). Take any readings of temps for a two or more
drive setup with a pinch of salt if you very rarely see split readings.
Forensic examination of the temps of the drives when _both_ had been
fitted in the hard disk drive bay suggested the upper drive had been
running a good 5 to 6 deg hotter.
I now have an extra drive cage fitted to keep the drives well seperated
with plenty of air space to allow the flow of air from the strategically
placed 7 volted slimline 60mm fan to flow freely around them. Just a
gentle breeze is all that is required to prevent the stagnant air around
the drives acting as a thermal insulator (all too common a feature in a
lot of 'standard' case designs).
HTH
--
Regards, John.
Please remove the "ohggcyht" before replying.
The address has been munged to reject Spam-bots.
.
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