hdparm: add page (#3915)

pages/linux/hdparm.md

@@ -0,0 +1,27 @@
+# hdparm
+
+> Get and set SATA and IDE hard drive parameters.
+
+- 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}}`