Re: [PATCH 4/6] SATA AHCI: Blacklist system that spins off disks during ACPI power off

From: Maciej Rutecki
Date: Tue Jan 20 2009 - 02:32:24 EST

2009/1/19 Rafael J. Wysocki <rjw@xxxxxxx>:
> From: Rafael J. Wysocki <rjw@xxxxxxx>
> 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 nx6310 that uses the AHCI driver.
> Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>

Tested-by: Maciej Rutecki <maciej.rutecki@xxxxxxxxx>

Tested on HP Compaq nx6310

Thanks for patches

Maciej Rutecki
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