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THere are many >= 1TB external HDDs on the market, such as

WD My Passport Essential SE WDBACX0010BBK - Hard drive - external ( portable ) - 1 TB - USB 3.0

Seagate FreeAgent GoFlex Desk Kit - Hard drive - external ( desktop ) - 1 TB - USB 3.0

I wonder if heat is a big problem to such external HDDs, whether they are portable or desktop?

What kinds of technologies have been used to reduce generated heat and dissipate heat?

Thanks!

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closed as not constructive by Randolph West, Indrek, Diogo, Journeyman Geek, 8088 Aug 22 '12 at 15:18

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1 Answer 1

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Heat dissipation is tied directly to power consumption, and as drives age, disk failure rates increase at higher drive temperatures.

Techniques Used For Heat Dissipation:

[1] Smaller form factor drives often use less power hence less heat is generated.

[2] Actively controlling the seek speed so that the head arrives at its destination only just in time to read the sector, rather than arriving as quickly as possible and then having to wait for the sector to come around.

[3] Hard drive companies are now producing Green Drives that require much less power and cooling. They spin slower than 5,400 rpm thereby generating less heat.

[4] Power consumption can also be reduced by parking the drive heads when the disk is not in use reducing friction, adjusting spin speeds, and disabling internal components when not in use.

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Thanks! What do you mean by "Smaller form factor"? –  Tim Aug 22 '12 at 11:51
    
Smaller form factor as in smaller size .. 2.5 inch hard drives are smaller than 3.5 inch drives .. the height and weight is also less, and they contribute towards using less power.. –  aliasgar Aug 22 '12 at 11:55
    
Basically what you said is reducing heat generation. Do you know about heat dissipation? Thanks! –  Tim Aug 23 '12 at 17:13
    
Heat Dissipation is defined as cooling / heat reduction / transfer of heat. When the device is producing less heat itself, there is no need for special cooling elements like Heat Sinks or Cooling paste etc. But most of these hard drives have a metal coating around it, which absorb the heat from the core, just like the heat sink does. This is given not because its needed, it's just a precautionary measure, to improve sustenance. –  aliasgar Aug 23 '12 at 17:21

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