I have seen this when resuming from hibernation as well. Unfortunately the timestamps in the hdparm.log are then difficult to compare to the timestamps in dmesg. I therefore added a sysrq to the wrapper, so you will find "SysRq : Show Regs" in dmesg when hpparm is run. So the coincidences should be easier to verify, using for instance: egrep 'Emask|SysRq' /var/log/syslog
I have seen this when resuming from hibernation as well. Unfortunately the timestamps in the hdparm.log are then difficult to compare to the timestamps in dmesg. I therefore added a sysrq to the wrapper, so you will find "SysRq : Show Regs" in dmesg when hpparm is run. So the coincidences should be easier to verify, using for instance: egrep 'Emask|SysRq' /var/log/syslog