HDD Write Speed

saberahul

macrumors 68040
Original poster
Nov 6, 2008
3,616
88
USA
For the i7 in my signature, what is the hdd write speed? I am wondering if I should buy the thunderbolt cable for faster transfers between my 2 macs but if the write speed is no where as close to 1.25GBps, then I see no point in buying it. Can someone clear this for me?
 

geoffreak

macrumors 68020
Feb 8, 2008
2,193
2
HDDs get no more than about 70MB/s read and about 50MB/s write from what I've seen (especially the ones Apple puts in their laptops). At those speeds, you can't even max out USB 2.0, let alone Thunderbolt.
 
Nov 28, 2010
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located
HDDs get no more than about 70MB/s read and about 50MB/s write from what I've seen (especially the ones Apple puts in their laptops). At those speeds, you can't even max out USB 2.0, let alone Thunderbolt.
2.5" S-ATA HDDs spinning at 5.400 RPM can easily reach 70 to 80 MB/s read AND write speeds. 2.5" S-ATA HDDs spinning at 7.200 TPM can reach up to 100 MB/s.
USB 2.0 will peak at 37 to 38 MB/s, Firewire 800 will get you 60 to 70 MB/s.

PS: I have several 2.5" S-ATA HDDs, one even is a 7.200 RPM one (Momentus 7200.4), and I have tested them via e-SATA to get those numbers.


 

geoffreak

macrumors 68020
Feb 8, 2008
2,193
2
I suppose the USB comparison was a bit of an exaggeration, but the point still stands that Thunderbolt is overkill.