.\"	$NetBSD: scsictl.8,v 1.13 2001/11/16 11:26:56 wiz Exp $
.\"
.\" Copyright (c) 1998 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
.\" NASA Ames Research Center.
.\"
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.Dd October 15, 1998
.Dt SCSICTL 8
.Os
.Sh NAME
.Nm scsictl
.Nd a program to manipulate SCSI devices and busses
.Sh SYNOPSIS
.Nm
.Ar device
.Ar command
.Oo
.Ar arg Oo ...
.Oc
.Oc
.Sh DESCRIPTION
.Nm
allows a user or system administrator to issue commands to and otherwise
control SCSI devices and busses.  It is used by specifying a device or
bus to manipulate, the command to perform, and any arguments the command
may require.
.Nm
determines if the specified device is an actual device or a SCSI bus
automatically, and selects the appropriate command set.
.Pp
For commands which
.Nm
issues a SCSI command to the device directly, any returned sense information
will be decoded by
.Nm
and displayed to the standard output.
.Sh DEVICE COMMANDS
The following commands are supported for SCSI devices:
.Pp
.Nm format
.Pp
(Low level) format the named device.
.Pp
.Nm identify
.Pp
Identify the specified device, displaying the device's SCSI
bus, target, and lun, as well as the device's vendor, product,
and revision strings.
.Pp
.Nm reassign
.Ar blkno
.Oo blkno Oo ...
.Oc
.Oc
.Pp
Issues a
.Li REASSIGN BLOCKS
command to the device, adding the specified blocks to the
grown defect list.  This command is only supported on
direct access devices.
.Pp
.Nm reset
.Pp
Reset the device.  This command is only supported for devices which
support the
.Li SCIOCRESET
ioctl.
.Sh BUS COMMANDS
The following commands are supported for SCSI busses:
.Pp
.Nm reset
.Pp
Reset the SCSI bus.  This command is only supported if the host adapter
supports the
.Li SCBUSIORESET
ioctl.
.Pp
.Nm scan
.Ar target
.Ar lun
.Pp
Scan the SCSI bus for devices.  This is useful if a device was not
connected or powered on when the system was booted.  The
.Ar target
and
.Ar lun
arguments specify which SCSI target and lun on the bus is to be scanned.
Either may be wildcarded by specifying the keyword
.Dq any
or
.Dq all .
.Pp
.Nm detach
.Ar target
.Ar lun
.Pp
Detach the specified device from the bus. Useful if a device is powered down
after use.  The
.Ar target
and
.Ar lun
arguments have the same meaning as for the
.Nm scan
command, and may also be wildcarded.
.Sh NOTES
When scanning the SCSI bus, information about newly recognized devices
is printed to console. No information is printed for already probed
devices.
.Sh FILES
.Pa /dev/scsibus*
- for commands operating on SCSI busses
.Sh SEE ALSO
.Xr ioctl 2 ,
.Xr cd 4 ,
.Xr ch 4 ,
.Xr sd 4 ,
.Xr se 4 ,
.Xr ss 4 ,
.Xr st 4 ,
.Xr uk 4
.Sh HISTORY
The
.Nm
command first appeared in
.Nx 1.4 .
.Sh AUTHORS
The
.Nm
command was written by Jason R. Thorpe of the Numerical Aerospace Simulation
Facility, NASA Ames Research Center.