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PostPosted: Thu Nov 01, 2018 7:39 am 
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On those occasions when I run iDefrag on my external drives, I am told the drives cannot be monitored for heat. So, I use a small fan to cool the drives when defragging (it works very well).

My guess is that heat is generated during defragging because of the constant reading and writing taking place and the excessive head movement.

But what about when scanning drives for viruses, etc? Am I correct that this creates less heat because there is mostly reading and far less head movement?

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PostPosted: Thu Nov 01, 2018 10:29 am 
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I would think the diff to be tiny between 50/50 R&W and 100% Read.


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PostPosted: Fri Nov 02, 2018 6:25 am 
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OK, thanks, BD.

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PostPosted: Fri Nov 02, 2018 8:39 pm 
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BDAqua wrote:
I would think the diff to be tiny between 50/50 R&W and 100% Read.


That depends on the fragmentation. On a platter based drive that isn't super fragmented, reads could result in lower temps than mixed 50/50 loads as the heads aren't thrashing around as much, if at all. For SSDs, it only shows up as higher thermals when I/O peaks or bottlenecks (varies by queue depth). Adequate thermal dissipation for full load for at least moderate durations means the drive won't roast itself in the enclosure.

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PostPosted: Fri Nov 02, 2018 8:55 pm 
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Ah! Thanks...

Reminds me years ago, Seagate Drives had a 3 year Warranty, but if you purchased the same Seagate drive in a Seagate enclosure, the Warranty was 1 year. :bonk:


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