linux-kernel - 2.6.31-rc5 regression: hd don't show up

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Date:	Fri, 14 Aug 2009 10:26:12 +0200
From:	Tim Blechmann <tim@...ngt.org>
To:	linux-kernel@...r.kernel.org
Cc:	linux-ide@...r.kernel.org
Subject:  2.6.31-rc5 regression: hd don't show up

hi all,

running 2.6.31-rc5 (7cb7beb31aa3d941833b6a6e553687422c31e4b6 to be
exact), sometimes some hard disks don't show up.

after booting, my root hd (sda) is mounted to /, while two other hds
(sdb/sdc) are mounted as a user. sda is always present, but the other
two sometimes don't show up (i.e. they are not listed in /dev/disk/, nor
to they have a /dev/sdX link). with 2.6.29 and 2.6.30, all three disks
are reported correctly.

the lspci output of my controller:
00:1f.2 IDE interface: Intel Corporation 82801JI (ICH10 Family) 4 port
SATA IDE Controller (prog-if 8f [Master SecP SecO PriP PriO])
	Subsystem: ASUSTeK Computer Inc. Device 82d4
	Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 20
	I/O ports at a000 [size=8]
	I/O ports at 9c00 [size=4]
	I/O ports at 9880 [size=8]
	I/O ports at 9800 [size=4]
	I/O ports at 9480 [size=16]
	I/O ports at 9400 [size=16]
	Capabilities: [70] Power Management version 3
	Capabilities: [b0] PCIe advanced features <?>
	Kernel driver in use: ata_piix

00:1f.5 IDE interface: Intel Corporation 82801JI (ICH10 Family) 2 port
SATA IDE Controller (prog-if 85 [Master SecO PriO])
	Subsystem: ASUSTeK Computer Inc. Device 82d4
	Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 20
	I/O ports at b000 [size=8]
	I/O ports at ac00 [size=4]
	I/O ports at a880 [size=8]
	I/O ports at a800 [size=4]
	I/O ports at a480 [size=16]
	I/O ports at a400 [size=16]
	Capabilities: [70] Power Management version 3
	Capabilities: [b0] PCIe advanced features <?>
	Kernel driver in use: ata_piix


dmesg output is attached. if i should provide some other information
about my system, please let me know

best, tim

-- 
tim@...ngt.org
http://tim.klingt.org

The price an artist pays for doing what he wants is that he has to do
it.
  William S. Burroughs


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