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

     atacontrol	-- ATA device driver control program

     atacontrol	<command> args

     atacontrol	attach channel
     atacontrol	detach channel
     atacontrol	reinit channel
     atacontrol	create type [interleave] disk0 ... diskN
     atacontrol	delete raid
     atacontrol	rebuild	raid
     atacontrol	status raid
     atacontrol	mode channel [mastermode slavemode]
     atacontrol	info channel
     atacontrol	cap channel device
     atacontrol	enclosure channel device
     atacontrol	list

     The atacontrol utility is a control program that provides the user	access
     and control to the	FreeBSD	ata(4) subsystem.

     The atacontrol utility can	cause severe system crashes and	loss of	data
     if	used improperly.  Please exercise caution when using this command!

     The channel argument is the number	of the ATA channel on which to oper-
     ate.  The following commands are supported:

     attach   Attach an	ATA channel.  Devices on the channel are probed	and
	      attached as is done on boot.

     detach   Detach an	ATA channel.  Devices on the channel are removed from
	      the kernel, and all outstanding transfers	etc. are returned back
	      to the system marked as failed.

     reinit   Reinitialize an ATA channel.  Both devices on the	channel	are
	      reset and	initialized to the parameters the ATA driver has
	      stored internally.  Devices that have gone bad and no longer re-
	      spond to the probe, or devices that have physically been re-
	      moved, are removed from the kernel.  Likewise are	devices	that
	      show up during a reset, probed and attached.

     create   Create a type ATA	RAID.  The type	can be RAID0 (stripe), RAID1
	      (mirror),	RAID0+1	or SPAN	(JBOD).	 In case the RAID has a	RAID0
	      component, the interleave	must be	specified in number of sec-
	      tors.  The RAID will be created of the individual	disks named
	      disk0 ...	diskN.

	      Although the ATA driver allows for creating an ATA RAID on disks
	      with any controller, there are restrictions.  It is only possi-
	      ble to boot on an	array if it is either located on a "real" ATA
	      RAID controller like the Promise or Highpoint controllers, or if
	      the RAID declared	is of RAID1 or SPAN type; in case of a SPAN,
	      the partition to boot must reside	on the first disk in the SPAN.

     delete   Delete a RAID array on a RAID capable ATA	controller.

     rebuild  Rebuild a	RAID1 array on a RAID capable ATA controller.

     status   Get the status of	an ATA RAID.

     mode     Without the two mode arguments, the current transfer modes of
	      both devices are printed.	 If the	mode arguments are given, the
	      ATA driver is asked to change the	transfer modes to those	given.
	      The ATA driver will reject modes that are	not supported by the
	      hardware.	 Modes are given like "PIO3", "udma2", "udma100", case
	      does not matter.	If one of the devices mode should not be
	      changed, use a nonexisting mode as argument (i.e.	"XXX"),	and
	      the mode will remain unchanged.

	      Currently	supported modes	are: BIOSDMA, PIO0 (alias BIOSPIO),
	      PIO1, PIO2, PIO3,	PIO4, WDMA2, UDMA2 (alias UDMA33), UDMA4
	      (alias UDMA66), UDMA5 (alias UDMA100) and	UDMA6 (alias UDMA133).

     info     Show info	about the attached devices on the channel.  The	device
	      name and manufacture/version strings are shown.

     cap      Show detailed info about the device on channel device where de-
	      vice is 0	for master and 1 for slave.

	      Show detailed info about the enclosure on	channel	device where
	      device is	0 for master and 1 for slave.  Fan RPM speed, enclo-
	      sure temperature,	5V and 12V levels are shown.

     list     Show info	about all attached devices on all active controllers.

     To	see the	devices' current access	modes, use the command line:

	   atacontrol mode 0

     which results in the modes	of the devices being displayed as a string
     like this:

	   Master = WDMA2
	   Slave  = PIO4

     This means	that ata0-master is in DMA mode, ata0-slave is in PIO mode,
     and so forth.  You	can set	the mode with atacontrol and a string like the
     above, for	example:

	   atacontrol mode 0 PIO4 PIO4

     The new modes are set as soon as the atacontrol command returns.


     The atacontrol utility first appeared in FreeBSD 4.6.

     The atacontrol utility was	written	by Soren Schmidt <>.

     This manual page was written by Soren Schmidt <>.

BSD				 May 17, 2001				   BSD


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