Why is it less intensive on my system to transfer data one way than the other?

[KingNothing]

I have a Dell 8250 (2.4GHz, 768MB, Win2K) with a 60 GB WD primary drive and an 80GB Seagate Barracuda slave drive. When I transfer large amounts of data from the 60GB to the 80GB, my system responds considerably slower. When I transfer data the other way, however, my system responds as normal. Both partitions involved in the transfer are NTFS and Indexing Service is turned off for both of them. Why is this and does it say anything about the relative speed of my two drives? Both are 7200 RPM.

 

[KingNothing]

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[KingNothing]

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[GullyFoyle]

Writing usually takes more time than writing, so with similar speed devices, during the transfer process the drive being written to should be the limiting factor.
This would seem to indicate your 80 gig drive is slower.

On the other hand, you may have some sort of "write verify" on on one drive and not the other, or write caching may be disabled on one drive and not the other.

 

[KingNothing]

Originally posted by: DanDeighan
Writing usually takes more time than reading, so with similar speed devices, during the transfer process the drive being written to should be the limiting factor.
This would seem to indicate your 80 gig drive is slower.

On the other hand, you may have some sort of "write verify" on on one drive and not the other, or write caching may be disabled on one drive and not the other.

I assume this is what you meant. Write caching is enabled on both of my drives. I don't know if I have a "write verify" mechanism or not. Assuming I don't, then I'm correct in having the 60GB drive as my system drive and the 80GB as my data drive?