1995-01-25 09:18:56 +00:00
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.Dd October 11, 1993
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.Dt UK 4
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.Os FreeBSD
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.Sh NAME
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.Nm uk
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.Nd scsi user-level driver
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.Sh SYNOPSIS
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1995-03-01 22:32:38 +00:00
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.Nm device uk
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1995-01-25 09:18:56 +00:00
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.Sh DESCRIPTION
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The
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.Xr uk
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driver provides support for a
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process to address devices on the scsi bus for which there is no configured
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driver.
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.Pp
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1995-03-01 22:32:38 +00:00
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In FreeBSD releases prior to 2.1, the first unknown device
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found will be attached as
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.Em uk0
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and the next,
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.Em uk1
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etc.
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Beginning in 2.1 it is possible to specify what uk unit a device should
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come on line as; refer to
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.Xr scsi 4
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for details on kernel configuration.
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.Pp
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A scsi adapter must also be separately configured into the system
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1995-01-25 09:18:56 +00:00
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before this driver makes sense.
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.Pp
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.Sh KERNEL CONFIGURATION
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If an count is given that number of
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.Nm
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devices will be configured into the kernel.
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.Pp
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.Sh IOCTLS
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The
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.Nm
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driver has no ioctls of it's own but rather acts as a medium for the
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generic
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.Xr scsi 4
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ioctls. These are described in
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.Em sys/scsiio.h.
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.Sh FILES
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.Bl -tag -width /dev/uk0XXX -compact
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.It Pa /dev/uk[0-255]
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uk{x} is the 'xth'unknown device found.
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.El
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.Sh DIAGNOSTICS
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All
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.Xr scsi 4
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debug ioclts work on
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.Nm
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devices.
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.Sh SEE ALSO
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.Xr sd 4
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.Xr st 4
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.Xr cd 4
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.Xr ch 4
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.Xr su 4
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.Xr scsi 4
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.Sh HISTORY
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The
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.Nm
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driver appeared in 386BSD 0.1
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