I recently bought a 1TB WD drive which said "Interface: SATA 6 Gb/s" but when copying/transferring files the speed is 35MB/s.
do you need special cables to get that rate?
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That only refers to the interface compatibility. It's a bit of false advertising. Instead of 6Gb/s they could just use the term SATA-3. So your hard drive is fully compatible to SATA-3 which has a maximum theoretical throughput of 6Gb/s.
You do not need any special cables for SATA 3, your current transferring rate is absolutely normal for an HDD. To get to the maximum speed of SATA 3 you would need a modern SSD.
Modern HDDs are capable of getting to burst rates of ~150MB/s and average read/writes of 60-80MB/s but that only goes for the multi disk 2TB+ drives.
timonsku
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