Hard drive transfer speeds

[Neo_VR]

Bit of a question...
I know that these days modern hard drives should have transfer rates into the 100mb/s range.. but is that realistic..
I mean ive done a not scientific test.. i have two drives in my PC, a 500gig seagate which is about a year old and a new 640gb AAKS WD drive (the 2 platter version)
Theoretically both have 100mb/s transfer rate.. however transferring a file between the two in vista never sees more than 40mb/s... This is with them both on a DFI Lanparty X48 mobo on the ICH9R.


Also ive noticed under heavy IO, the computer gets a bit sluggish.. and this is even when im not hammering the system drive. CPU usage stays flat throughout too. i would have thought this shouldnt happen with a modern system??

Also which mode is best to run the ICH9 in... AHCI or legacy?

Ta

[Kelainefes]

Where did you see a test where the drives you own score 100 MB/sec?
Only "mainstream" units that can archieve that speed are the Velociraptors and the new 1.5 TB disk from Seagate, maybe the Spinpint F1 series from Samsung if i recall correctly.
If you wanna see that kind of speed with "normal" drives you need a RAID 0 or 5 array.
That and Vista hadles disk transfers slower than XP.

As for the AHCI or Legacy question, AHCI may give you a marginal increase of speed in some situations, because of Native Command Queueing, wich basically does this: when multiple instructions are sent to the disk, the disk may change order in wich they are to be executed so to limit the travel of the read/write head to a minimum.

[supershanks]

try using the hd benching tools

[Kelainefes]

Originally Posted by Kelainefes

That and Vista hadles disk transfers slower than XP.

Sorry, if you have SP1 installed the slow transfer rate problem should be gone.