atacontrol

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

NAME
atacontrol -- ATA device driver control program

SYNOPSIS
atacontrol <command> args

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

DESCRIPTION
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 ATA channel device (e.g., ata0) on which to
operate. 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
respond to the probe, or devices that have physically been
removed, 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, SPAN or 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.

addspare
Add a spare disk to an existing RAID.

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

status Get the status of an ATA RAID.

mode Without the mode argument, the current transfer modes of the
device are printed. If the mode argument is given, the ATA
driver is asked to change the transfer mode to the one 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.

Currently supported modes are: PIO0, PIO1, PIO2, PIO3, PIO4,
WDMA2, UDMA2 (alias UDMA33), UDMA4 (alias UDMA66), UDMA5 (alias
UDMA100) and UDMA6 (alias UDMA133). The device name and manu-
facture/version strings are shown.

cap Show detailed info about the device on device.

info Show info about the attached devices on the channel.

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

EXAMPLES
To get information on devices attached to a channel, use the command
line:

atacontrol info ata0

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

atacontrol mode ad0

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

current mode = UDMA100

You can set the mode with atacontrol and a string like the above, for
example:

atacontrol mode ad0 PIO4

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

SEE ALSO
ata(4)

HISTORY
The atacontrol utility first appeared in FreeBSD 4.6.

AUTHORS
The atacontrol utility was written by Soren Schmidt <sosATFreeBSD.org>.

This manual page was written by Soren Schmidt <sosATFreeBSD.org>.

FreeBSD 6.2 August 16, 2005 FreeBSD 6.2

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