linux-kernel - Re: Unknown SATA PIIX PCI device ID 0x29b6

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Date:	Thu, 6 Mar 2008 12:57:32 +0100 (CET)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	Tejun Heo <htejun@...il.com>
cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	Jeff Garzik <jeff@...zik.org>, linux-ide@...r.kernel.org
Subject: Re: Unknown SATA PIIX PCI device ID 0x29b6

On Thu, 6 Mar 2008, Tejun Heo wrote:

> 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.

I've seen this messages both on cold- and hot-plug.

> How long did the whole thing take?

Here's a hot-plug log:

Mar  4 15:04:28 6a kernel: ata4: exception Emask 0x10 SAct 0x0 SErr 0x4050000 action 0xa frozen
Mar  4 15:04:28 6a kernel: ata4: irq_stat 0x00000040, connection status changed
Mar  4 15:04:28 6a kernel: ata4: SError: { PHYRdyChg CommWake DevExch }Mar  4 15:04:28 6a kernel: ata4: hard resetting link
Mar  4 15:04:38 6a kernel: ata4: softreset failed (device not ready)
Mar  4 15:04:38 6a kernel: ata4: hard resetting link
Mar  4 15:04:48 6a kernel: ata4: softreset failed (device not ready)
Mar  4 15:04:48 6a kernel: ata4: hard resetting link
Mar  4 15:04:55 6a kernel: ata4: port is slow to respond, please be patient (Status 0x80)
Mar  4 15:05:20 6a kernel: ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Mar  4 15:05:20 6a kernel: ata4.00: ATA-7: WDC WD1600BB-00RDA0, 20.00K20, max UDMA/100
Mar  4 15:05:20 6a kernel: ata4.00: 312581808 sectors, multi 0: LBA48
Mar  4 15:05:20 6a kernel: ata4.00: applying bridge limits
Mar  4 15:05:20 6a kernel: ata4.00: configured for UDMA/100
Mar  4 15:05:20 6a kernel: ata4: EH complete
Mar  4 15:05:20 6a kernel: scsi 3:0:0:0: Direct-Access     ATA      WDC WD1600BB-00R 20.0 PQ: 0 ANSI: 5
Mar  4 15:05:20 6a kernel: sd 3:0:0:0: [sdb] 312581808 512-byte hardware sectors (160042 MB)
Mar  4 15:05:20 6a kernel: sd 3:0:0:0: [sdb] Write Protect is off
Mar  4 15:05:20 6a kernel: sd 3:0:0:0: [sdb] Mode Sense: 00 3a 00 00
Mar  4 15:05:20 6a kernel: sd 3:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Mar  4 15:05:20 6a kernel: sd 3:0:0:0: [sdb] 312581808 512-byte hardware sectors (160042 MB)
Mar  4 15:05:20 6a kernel: sd 3:0:0:0: [sdb] Write Protect is off
Mar  4 15:05:20 6a kernel: sd 3:0:0:0: [sdb] Mode Sense: 00 3a 00 00
Mar  4 15:05:20 6a kernel: sd 3:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Mar  4 15:05:20 6a kernel:  sdb: sdb1 sdb2
Mar  4 15:05:20 6a kernel: sd 3:0:0:0: [sdb] Attached SCSI disk
Mar  4 15:05:20 6a kernel: sd 3:0:0:0: Attached scsi generic sg2 type 0

Looks like almost a minute to me? On another occurence I see about 1.5 
minutes, then "port is slow to respond, please be patient (Status 0x80)" 
has been repeated 3 times. On cold-plug also 3 times, I think, about the 
same time then (time is not updated in the log).

> And is it always like that?

So far - yes.

> > 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.

Sorry, I actually meant to ask what "UDMA/133" means for a SATA link?

Thanks
Guennadi
---
Guennadi Liakhovetski
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