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SubjectRe: [PATCH 6/6] SATA PIIX: Blacklist system that spins off disks during ACPI power off
2009/1/19 Rafael J. Wysocki <>:
> From: Rafael J. Wysocki <>
> Some notebooks from HP have the problem that their BIOSes attempt to
> spin down hard drives before entering ACPI system states S4 and S5.
> This leads to a yo-yo effect during system power-off shutdown and the
> last phase of hibernation when the disk is first spun down by the
> kernel and then almost immediately turned on and off by the BIOS.
> This, in turn, may result in shortening the disk's life times.
> To prevent this from happening we can blacklist the affected systems
> using DMI information.
> Blacklist HP 2510p that uses the ata_piix driver.
> Signed-off-by: Rafael J. Wysocki <>

Tested-by: Maciej Rutecki <>

Tested on HP Compaq nx6310

Thanks for patches

Maciej Rutecki

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