Which hdd is faster?

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John699

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So how do you determine which is faster like consider you happen to transfer the data of 50 gb from drive c to drive d.....so what happens is drive c is sending info while drive d is receiving info and say the speed was 50mbps and you just twist it around meaning now you transfer from d to c the very same 50 gb data and now the speed was 90mbps

So it means one drive is faster then another one but which one c or d
 
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leo2kp

leo2kp

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It means that you probably have a combination of things happening. Unless you restarted the PC in between transfers, the file is cached, so it's going to read it from memory and not have to wait to read it from the source HDD. The other thing that could be happening is that the write speed of one drive is faster than the write speed of the other, and the same with read speed.

Best way to determine performance is to run a benchmark against each drive. I recommend downloading CrystalDiskMark and running it against C and D, but not at the same time :)
 
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John699

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But how about you restarted pc and still the same result

And the cabinet is rock solid packed and you can't open to see which drive is which speed so by the info given above which drive is faster c or d
 
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John699

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Thanks mate a lot a lot a lot that was the answer is was looking for as I by accident selected the other guy as the solution but if anybody is watching this thread then do know that by accident I selected the wrong solution as a matter of fact the most suitable and on spot solution is by this moderator here....wish I knew how to reverse time or knew how to deselect the solution and select this as the one

Thanks mate alot
 
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leo2kp

leo2kp

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Again, it depends. As rgd1101 states, write-speeds are typically the slower of the two metrics. It also depends on what kind of decision you're making with this information. There are several metrics that determine performance such as sequential read and write, read/writes with a specific queue-depth (usually 32), 4k read/write measured in IOPS, etc. If you get a 90mb/s write to C:, that's a sequential write speed. But your D: drive might actually have a faster 4k read speed which means that if Windows were installed on D:, it would probably boot faster from D: than C:. On a mechanical disk though, a faster write can mean a faster read. So if I had to make a decision on the spot with a considerable lack of information, I would say "C". I would benchmark them both just to be certain and you don't have to open any cabinets to do that.
 
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