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 Posted: Tue, 13th Sep 2011 13:39 Post subject: Hard Drive Transfer Rate Problems |
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so i have two hard drives one is a 640gb WD aacs (green) and the other is a 160GB WD
problem is when copying/moving stuff from a partition in the 640gb HD to an other one on the same HD i always get slow speed like it starts at about 50megs then it slows down to like ~13 megs
i don't have that problem though when copying or moving from the 640gb to the 160gb HD it stays at 50mb all the way .
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| Posted: Tue, 13th Sep 2011 14:02 Post subject: |
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That's because hard drives read/write the fastest when it's sequential. When you both read and write to the same hard drive (even if it's different partitions) it's only partially sequential because the hard drive reads a bit of data to fill it's buffer, then the mechanical drive head has to jump to another location that may be far away, empty the buffer, go back and so on. Head keeps jumping back and forth and those mechanical head movements are quite slow.
When you read from one drive and write to another those issues are avoided and the head moves sequentially from one cluster to another (if there's no fragmentation).
This is also the reason why reading or writing two files at once (e.g. copying or extracting two files) will not only take twice as long, but more like 4-5 times longer.
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| Posted: Tue, 13th Sep 2011 14:06 Post subject: |
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i didn't think the impact was that harsh , anyway to minimize those effects ?
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| Posted: Tue, 13th Sep 2011 14:11 Post subject: |
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There are special copying tools that try to limit hard drive head movements.
I haven't tried any myself, but check it out here: http://latesttechworld.com/2010/09/tools-speed-up-copy-paste-windows/
Talent copy seems okay:
| Quote: | | Talent copy is the best software to copy files in the same hard disk. It makes your files copy easy and also prevents your hard disk or data from any damage. Talent Copy uses advanced algorithm to limit empty HDD(Hard disk drive) head moves, HDD waste, noise and power on file copying and increase file copy speed dramatically. |
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| Posted: Tue, 13th Sep 2011 14:14 Post subject: |
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| Posted: Tue, 13th Sep 2011 14:15 Post subject: |
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np. let me know if they help I'd like to know that myself
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| Posted: Tue, 13th Sep 2011 14:32 Post subject: |
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just tried talent copy and tera copy and they didn't help , i guess no program can circumvent hardware related issues
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