Noel wrote a nice article on smartmontools, a tool to detect and warn of impending disk failures, a must have if you like to maintain your system.

Adding the line "sudo hdparm -B 254 /dev/sda" in my /etc/rcS.d file to reduce the Load_Cycle_Count (ID#193) results in the Temperature overshooting the limit (it should not be more than 45ºC). This is apparently not good for the disk health. Activating laptop-mode means it fails to function in the battery mode....not nice either!!

According to Noel :

hdparm -B 254 /dev/sda causes that your disk can NOT spin down nor make any kind of power management. Remember always that every single KiloWatt-hour you spend in your computer (or any piece of it, like a hard disc) is a KiloWatt-hour that turns into heat and a KiloWatt-hour you must manage with the cooling system. I strongly suggest against that kind of aggresive performance setting except for dedicated servers in 24×7 attended rooms.

I suggest changing the hdparm value to 127 (or simply to delete that line) AND to better ventilate the disc.


It seems, folks at seagate forums have been complaining about it too...  So is there another solution available to protect laptop disks from frequent head (un)parking AND managing temperature at the same time or are they mutually not feasible in SMART?

Forgot to add about the Bengaluru LUG met yesterday (which was my first LUG meet in this city, the earlier meets being FSUG meets) with Sriram, Kingsly, Rajshekhar, Sandip Bhattacharya, Deepika and me in attendance. The tasty lunch kept up an interesting exchange on a lazy Saturday afternoon and I need to find a way to stay away from Cauvery on MGRoad.