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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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