I've traced the trigger of the errors down to /usr/lib/pm-utils/power.d/powersave-policy-sata-link-power. This triggers the errors for me every time on my laptop:
echo "max_performance" | sudo tee /sys/class/scsi_host/host1/link_power_management_policy
I've traced the trigger of the errors down to /usr/lib/ pm-utils/ power.d/ powersave- policy- sata-link- power. This triggers the errors for me every time on my laptop:
echo "max_performance" | sudo tee /sys/class/ scsi_host/ host1/link_ power_managemen t_policy