linux-kernel - Re: Intermittent SATA failures ("link offline, clearing class 1 to NONE")

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Date:	Tue, 27 Apr 2010 10:55:54 +0100
From:	coptang@...il.com
To:	linux-kernel@...r.kernel.org
Subject: Re: Intermittent SATA failures ("link offline, clearing class 1 to 
	NONE")

Hi,

Further to emails from November and December last year that Tejun Heo
was investigating:
http://markmail.org/message/l3g3s27rwj6iuhje#query:Intermittent%20SATA%20failures%20%22%28link%20offline%2C%20clearing%20class%201%20to%20NONE%29%22+page:1+mid:g6ujvdfz4om2rnvf+state:results

I'm having the exact same problem, see below excerpt from dmesg. Note
that the disk that fails is seemingly random:
ata2.00: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata1.00: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata2.01: SATA link up <unknown> (SStatus 300 SControl 123)
ata2.00: link offline, clearing class 1 to NONE
ata1.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300)

I have attached a good and bad boot.

lspci -v shows:

00:1f.2 IDE interface: Intel Corporation Ibex Peak 4 port SATA IDE
Controller (rev 05) (prog-if 8f [Master SecP SecO PriP PriO])
        Subsystem: Dell Device 02a4
        Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 20
        I/O ports at eca0 [size=8]
        I/O ports at ec90 [size=4]
        I/O ports at eca8 [size=8]
        I/O ports at ec94 [size=4]
        I/O ports at ecc0 [size=16]
        I/O ports at ecd0 [size=16]
        Capabilities: [70] Power Management version 3
        Capabilities: [b0] PCI Advanced Features
        Kernel driver in use: ata_piix
        Kernel modules: pata_acpi, ata_piix

00:1f.5 IDE interface: Intel Corporation Ibex Peak 2 port SATA IDE
Controller (rev 05) (prog-if 85 [Master SecO PriO])
        Subsystem: Dell Device 02a4
        Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 21
        I/O ports at ecb0 [size=8]
        I/O ports at ec98 [size=4]
        I/O ports at ecb8 [size=8]
        I/O ports at ec9c [size=4]
        I/O ports at ece0 [size=16]
        I/O ports at ecf0 [size=16]
        Capabilities: [70] Power Management version 3
        Capabilities: [b0] PCI Advanced Features
        Kernel driver in use: ata_piix
        Kernel modules: pata_acpi, ata_piix

I'm currently running linux-2.6.32-gentoo-r7 on amd64 but I've tried
linux-2.6.31-gentoo-r6 and linux-2.6.31-gentoo-r10 with the same
results. libata.force=nohrst makes no appreciable difference

As before 'echo "- - -" > /sys/class/scsi_host/hostX/scan' where X is
0 or 1 brings the drive back online.

As the original chat petered out I was hoping that this had since been
fixed. Anyone have any suggestions please?

View attachment "badboot.txt" of type "text/plain" (31437 bytes)

View attachment "goodboot.txt" of type "text/plain" (31427 bytes)