That being said, it's still not guaranteed that your drive enclosure will support relaying these instructions to the drive. (not all drives support disabling it, but most do).
MACBOOK EXTERNAL HARD DRIVE TIME OUT MANUAL
The manual for the linux hdparm provides the following info: -B Query/set Advanced Power Management feature,Ī low value means aggressive power managementĪnd a high value means better performance.įrom values 1 through 127 (which permit spin-down),Īnd values 128 through 254 (which do not permit spin-down).Īnd the highest I/O performance with a setting of 254.ĭisable Advanced Power Management altogether on the drive Printf("Started with pid %d\n", process_id) įprintf(fp,"%s %lu : %s","Step",step,asctime(time_info)) Printf("String length of target_directory is HUGE!\n") Printf("Usage: %s target_directory \n",argv) The code: (you can compile with gcc) #include usr/sbin/disk_awake /mnt/some_disk/keep_alive 30
MACBOOK EXTERNAL HARD DRIVE TIME OUT FREE
Feel free to modify as you like.Ĭommand line options are: the target directory to write awake.log and (optionally) the time delay (default 300)Į.g. That writes 10 times in cicles the current date and time in a log file so the disk is always on. I wrote a small daemon process that can run at boot time in /etc/rc.local (It never worked as the spin down is in disks firmware) SUBSYSTEM="usb", TEST="power/autosuspend" ATTR="-1" I used the following udev rule in /etc/udev/rules.d
The disk is meant to be powered on 24/7 for backing up purposes and acting as a small NAS attached to an Orange PI. I have an external 2TB disk that spins down after 30 minutes of inactivity. After all, disks are made for spinning not for idling, so if your priority is less fatigue than power consumption feel free to have your disks 24/7 spinning. All my disks with big start/stop count have reallocated sectors and all my disks that spin 10 years 24/7 are (believe it or not) good as new. Years of experience have shown that starting and stopping the disk motor causes far more fatigue than 24/7 spin. It is more than true that spinning down the disks decreases their service life.
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