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why do transfer rates start fast then slow down??

post #1 of 6
Thread Starter 
Im copying my game from my SSD to my 2nd HDD and the transfer rate was 367MB/s for about 10 seconds then it slowly dropped to 46MB/s sustained.. whats up with that??
post #2 of 6
It's going through the hard drive cache to start with.
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post #3 of 6
yep then will slow down to the speed of the HDD
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Going to be chaep
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Wife's Rig
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i7-3770k Gigabyte GA-Z77X-UP5 TH MSI GTX460 G.Skill TridentX 2400 2 x 4GB 
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Plextor M5p 128GB 2 x WD 500GB Blues LG Prolimatech Megahalems Rev C 
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Win 7 ultimate Samsung Syncmaster 932gwe+ OCZ ZT series 550W Coolermaster 410 
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1.67Ghz Atom stock 1GB DDR2 2 x 500GB Western Digital Cavier Blacks [RAID 1] 
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post #4 of 6
Thread Starter 
Quote:
Originally Posted by Outcasst View Post

It's going through the hard drive cache to start with.

oh ok i understand how cache would be faster. but is it writing to cache or the HDD? idk how that works
post #5 of 6
Quote:
Originally Posted by jcrew3002 View Post

oh ok but why does the hard drive cache make it faster?


It's DRAM. The HDD can take a small burst of data fast... but then slows down due to physical limitations of platter.


Also note that those statistics are not always that accurate (especially will small datasets like when it first begins).
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post #6 of 6
Thread Starter 
ok cool makes sense! Thanks all!
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