Re: Unknown SATA PIIX PCI device ID 0x29b6

[Tejun Heo <htejun@gmail.com>]

Guennadi Liakhovetski wrote:
> Indeed! It was in "IDE" mode, and 2 out of the 3 chips were handled by the 
> piix driver (btw, why did Intel put 3 different SATA controllers on one 
> board?). I switched it to AHCI mode (the third possibility is RAID) and 
> indeed a kernel with (only) ahci driver managed to bring them up! 
> Although, the eSATA link was "slow to respond":
> 
> ata4: port is slow to respond, please be patient (Status 0x80)
> ata4: softreset failed (device not ready)
> ata4: port is slow to respond, please be patient (Status 0x80)
> ata4: softreset failed (device not ready)
> ata4: port is slow to respond, please be patient (Status 0x80)
> ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> ata4.00: ATA-7: WDC WD1600BB-00RDA0, 20.00K20, max UDMA/100
> ata4.00: 312581808 sectors, multi 16: LBA48
> ata4.00: applying bridge limits
> ata4.00: configured for UDMA/100
> 
> but then it did manage it. Is such a delay normal?

If you hotplugged it, sometimes drives don't respond too well and takes
a few retries to talk to it.  How long did the whole thing take?  And is
it always like that?

> One more question, what do UDMA numbers mean in SATA context? The internal 
> SATA disk is "ata1.00: configured for UDMA/133", but should be SATA-2.

1.00 is port 1 device 00 and UDMA numbers don't mean much to SATA devices.

Thanks.

-- 
tejun