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NetBSD 6.1.5 - man page for atactl (netbsd section 8)

ATACTL(8)			   BSD System Manager's Manual				ATACTL(8)

NAME
     atactl -- a program to manipulate ATA (IDE) devices and busses

SYNOPSIS
     atactl device command [arg [...]]

DESCRIPTION
     atactl allows a user or system administrator to issue commands to and otherwise control
     devices which reside on standard IDE and ATA controllers, or the ATA bus itself.  It is used
     by specifying a device or bus to manipulate, the command to perform, and any arguments the
     command may require.

DEVICE COMMANDS
     The following commands may be used on IDE and ATA devices.  Note that not all devices sup-
     port all commands.

     identify	Identify the specified device, displaying the device's vendor, product, revision
		strings, and the device's capabilities.

     idle	Place the specified device into Idle mode.  This mode may consume less power than
		Active mode.

     standby	Place the specified device into Standby mode.  This mode will consume less power
		than Idle mode.

     sleep	Place the specified device into Sleep mode.  This mode will consume less power
		than Standby mode, but requires a device reset to resume operation.  Typically
		the wd(4) driver performs this reset automatically, but this should still be used
		with caution.

     setidle idle-timer
		Places the specified device into Idle mode, and sets the Idle timer to idle-timer
		seconds.  A value of 0 will disable the Idle timer.

     setstandby standby-timer
		Places the specified device into Standby mode, and sets the Standby timer to
		standby-timer seconds.	A value of 0 will disable the Standby timer.

     checkpower
		Will print out if the device is in Active, Idle, or Standby power management
		mode.

     apm [disable | set #]
		Controls the Advanced Power Management feature of the specified device.  Advanced
		Power Management is an optional feature used to specify a power management level
		to balance between device performance and power consumption.

		disable 	Disable the Advanced Power Management.

		set #		Enable the Advanced Power Management feature and set its level to
				the value #, where # is an integer within the scale 0-253; being
				0 the mode with the lowest power consumption (and thus the worse
				performance) and 253 the mode which provides the better perfor-
				mance at a cost of more power consumption.

				It should be noted that the effect of the value need not be con-
				tinous.  For example, a device might provide only two modes: one
				from 0 to 126 and other from 127 to 253.  Per the specification,
				values of 127 and higher do not permit the device to spin down to
				save power.

     smart [enable | disable | status | offline # | error-log | selftest-log]
		Controls SMART feature set of the specified device.  SMART stands for Self-Moni-
		toring, Analysis, and Reporting Technology.  It provides an early warning system
		by comparing subtle operation characteristics to those determined in vendor test-
		ing to precede device failures.

		enable		Enables access to SMART capabilities within the device.  Prior to
				being enabled, a SMART capable device neither monitors nor saves
				SMART attribute values.  The state of SMART, either enabled or
				disabled, will be preserved by the device across power cycles.

		disable 	Disables access to SMART capabilities within the device.
				Attribute values will be saved, and will no longer be monitored.

		status		Reports whether SMART is supported by the device, and whether
				SMART is enabled on the device (can only be determined on ATA6 or
				better devices).  If SMART is enabled, then a table of attribute
				information is printed.  Attributes are the specific performance
				or calibration parameters that are used in analyzing the status
				of the device.	The specific set of attributes being used and the
				identity of these attributes is vendor specific and proprietary.

				Attribute values are used to represent the relative reliability
				of individual performance or calibration parameters.  The valid
				range of attribute values is from 1 to 253 decimal.  Lower values
				indicate that the analysis algorithms being used by the device
				are predicting a higher probability of a degrading or faulty con-
				dition.

				Each attribute value has a corresponding threshold limit which is
				used for direct comparison to the attribute value to indicate the
				existence of a degrading or faulty condition.  The numerical
				value of the attribute thresholds are determined by the device
				manufacturer through design and reliability testing and analysis.
				Each attribute threshold represents the lowest limit to which its
				corresponding attribute value can equal while still retaining a
				positive reliability status.

				If the crit field is ``yes'' then negative reliability of this
				attribute predicts imminent data loss.	Otherwise it merely indi-
				cates that the intended design life period of usage or age has
				been exceeded.	The collect field indicates whether this
				attribute is updated while the device is online.  The reliability
				field indicates whether the attribute value is within the accept-
				able threshold.

		offline #	Runs the numbered offline self-test on the drive.

		error-log	Prints the error log.

		selftest-log	Prints the self-test log.

     security [freeze | status]
		Controls ``security'' (password protection) features of modern ATA drives.  The
		security commands are intended to be issued by low-level software (firmware /
		BIOS) only.  Generally, the security status should be ``frozen'' before the oper-
		ating system is started so that misbehaving or malicious software cannot set or
		change a password.  Older and buggy BIOSes neglect to do so; in these cases it
		might make sense to issue the ``freeze'' command early in the boot process.

		freeze	  freezes the drive's security status

		status	  displays the drive's security status

BUS COMMANDS
     The following commands may be used on IDE and ATA busses.	Note that not all devices support
     all commands.

     reset    Reset the bus.  This will reset all ATA devices present on the bus.  Any ATAPI
	      device with pending commands will also be reset.

SEE ALSO
     ioctl(2), wd(4), dkctl(8), scsictl(8)

HISTORY
     The atactl command first appeared in NetBSD 1.4.

AUTHORS
     The atactl command was written by Ken Hornstein.  It was based heavily on the scsictl(8)
     command written by Jason R. Thorpe.

BUGS
     The output from the identify command is rather ugly.

BSD					November 18, 2007				      BSD


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