cheat.sheets:hdparm
# get information about hard disks
hdparm -I /dev/sda
# perform timings of device/cache reads for benchmark and comparison purposes
hdparm -tT /dev/sda
tldr:hdparm
# hdparm
# Get and set SATA and IDE hard drive parameters.
# More information: <https://manned.org/hdparm>.
# Request the identification info of a given device:
sudo hdparm -I /dev/device
# Get the Advanced Power Management level:
sudo hdparm -B /dev/device
# Set the Advanced Power Management value (values 1-127 permit spin-down, and values 128-254 do not):
sudo hdparm -B 1 /dev/device
# Display the device's current power mode status:
sudo hdparm -C /dev/device
# Force a drive to immediately enter standby mode (usually causes a drive to spin down):
sudo hdparm -y /dev/device
# Put the drive into idle (low-power) mode, also setting its standby timeout:
sudo hdparm -S standby_timeout device
# Test the read speed of a specific device:
sudo hdparm -tT device
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cheat.sh