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by clashing I mean the hardware wouldnt make a copy of my current laptop hdd to the 750gb because they were different write speeds. I didnt think it was out of the question what I was trying so assumed the pos Apricorn ez Upgrade had fleeced me.
now I just wanna use the hdd up, I bought it for size (not speed, 16mb cache tho) the ps3 now needs moar size, and why not go 72x for the same price.
turns out its 8 years old.
.mo.
duncs
I have never heard of a 5400 rpm and 7200 rpm drive 'clashing'.
Disks differ in data density, so a faster spinning drive does not necessarily imply faster data transfer. Caching also affects data transfer speed for small files.
I guess it's possible if you're using some kind of naive hardware cloning system that expects the two disks to be identical and just streams data straight from one to another.
But anything via an OS of any kind should just deal with varying read/write speeds. I sometimes clone disks all day over network and it just takes longer with older, slower disks or if network is congested.