SATA 300 Drive Being Run At 150

Garrett Cooper youshi10 at u.washington.edu
Sat Jul 21 15:24:00 UTC 2007


Tim Daneliuk wrote:
> I asked this question a while back, but needed to do more digging to make
> sure I had latest sources etc.
>
> I have an Intel motherboard that shows this for a SATA controller:
>
> atapci1: <Intel ICH7 SATA300 controller> port 
> 0x20c8-0x20cf,0x20ec-0x20ef,0x20c0-0x20c7,0x20e8-0x20eb,0x20a0-0x20af 
> mem 0x90204000-0x902043ff irq 19 at device 31.2 on pci0
>
> But the hard drive - a SATA 300 device - shows up like this:
>
> ad4: 238475MB <WDC WD2500JS-00NCB1 10.02E02> at ata2-master SATA150
>                                                             ^^^^^^^
>
> Using dd, I have confirmed that the drive is running nowhere near
> SATA-III speeds, at least on reads:
>
> 968470075 bytes transferred in 7.132891 secs (135775249 bytes/sec)
>
> This is on a 6.2-Stable system that is very lightly loaded...
>
SATA Cable not 300Mbps capable?
-Garrett


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