SATA 300 Drive Being Run At 150

Tim Daneliuk tundra at
Sat Jul 21 15:12:36 UTC 2007

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...

Tim Daneliuk     tundra at
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