2003-01-06 04:51:20 +00:00
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.\" $FreeBSD$
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.\" Written by Tom Rhodes
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.\" This file is public domain
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.\"
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.Dd January 05, 2003
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.Dt IDA 4
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.Os
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.Sh NAME
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.Nm ida
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.Nd Compaq Intelligent Drive Array Controllers
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.Sh SYNOPSIS
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.Cd device scbus
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.Cd device ida
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.Sh DESCRIPTION
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The Compaq Intelligent Drive Array (IDA) technology is used to
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distribute data across an array of hard drives.
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It unites these hard drives into one or more high-performance logical drives.
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The drive array is managed by an array controller.
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.Pp
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These controllers have the ability to provide fault tolerance for the connected
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drives and optionally provide write cache for the logical drives.
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2003-02-24 22:53:26 +00:00
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It is also possible for an application to access the SCSI bus subsystem
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directly by using the pass-through interface.
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2003-01-06 04:51:20 +00:00
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.Pp
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The following controllers are supported by the
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.Nm
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driver:
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2003-02-24 22:53:26 +00:00
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.Pp
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.Bl -item -compact
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.It
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Compaq SMART Array 221
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.It
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Compaq Integrated SMART Array Controller
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.It
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Compaq SMART Array 4200
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.It
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Compaq SMART Array 4250ES
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.It
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Compaq SMART 3200 Controller
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.It
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Compaq SMART 3100ES Controller
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.It
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Compaq SMART-2/DH Controller
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.It
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Compaq SMART-2/SL Controller
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.It
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Compaq SMART-2/P Controller
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.It
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Compaq SMART-2/E Controller
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.It
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Compaq SMART Controller
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2003-01-06 04:51:20 +00:00
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.El
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2003-02-24 22:53:26 +00:00
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.Sh IMPLEMENTATION NOTES
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Extreme caution should be exercised when using the pass-through interface.
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It is possible to interfere with normal system I/O and cause hangs if
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pass-through is used to an active device.
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Pass-through should only be used to a device that is otherwise quiescent.
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2003-01-06 04:51:20 +00:00
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.Sh SEE ALSO
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.Xr cam 4 ,
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.Xr pass 4 ,
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.Xr xpt 4 ,
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2003-02-24 22:53:26 +00:00
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.Xr camcontrol 8
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2003-01-06 04:51:20 +00:00
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.Sh AUTHORS
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2003-02-24 22:53:26 +00:00
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.An -nosplit
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2003-01-06 04:51:20 +00:00
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The
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.Nm
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driver was written by
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.An Jonathan Lemon Aq jlemon@FreeBSD.org
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and
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.An Matthew N. Dodd Aq mdodd@FreeBSD.org .
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This manual page was written by
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.An Tom Rhodes Aq trhodes@FreeBSD.org .
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