[Bug 539467] Re: Frequent ATA errors and disk corruption

[red_hood]

Is it possible to find out which program is writing to the "/sys/class/scsi_host/hostX/link_power_management_policy" files? Setting permissions to 000 stops changing link power modes, so I guess the changes are handled in user space.
As a workaround, setting the S-ATA links to "Compatibility Mode" in BIOS (switching off AHCI) worked for me.

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Frequent ATA errors and disk corruption
https://bugs.launchpad.net/bugs/539467
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