1.\" $FreeBSD$ 2.\" Written by Tom Rhodes 3.\" This file is public domain 4.\" 5.Dd January 05, 2003 6.Dt IDA 4 7.Os 8.Sh NAME 9.Nm ida 10.Nd Compaq Intelligent Drive Array Controllers 11.Sh SYNOPSIS 12For one or more devices: 13.Cd device scbus 14.Cd device ida 15.Sh DESCRIPTION 16.Pp 17The Compaq Intelligent Drive Array (IDA) technology is used to 18distribute data across an array of hard drives. 19It unites these hard drives into one or more high-performance logical drives. 20The drive array is managed by an array controller. 21.Pp 22These controllers have the ability to provide fault tolerance for the connected 23drives and optionally provide write cache for the logical drives. 24It is also possible for an application to access the SCSI bus subsystem directly by 25using the pass-through interface. 26.Sh IMPLEMENTATION NOTES 27Extreme caution should be exercised when using the pass-through interface. 28It is possible to interfere with normal system I/O and cause hangs if 29pass-through is used to an active device. 30Pass-through should only be used to a device that is otherwise quiescent. 31.Sh COMPATIBILITY 32.Pp 33The following controllers are supported by the 34.Nm 35driver: 36.Bl -tag -compact -width "Supported Devices" 37.It Compaq SMART Array 221 38.It Compaq Integrated SMART Array Controller 39.It Compaq SMART Array 4200 40.It Compaq SMART Array 4250ES 41.It Compaq SMART 3200 Controller 42.It Compaq SMART 3100ES Controller 43.It Compaq SMART-2/DH Controller 44.It Compaq SMART-2/SL Controller 45.It Compaq SMART-2/P Controller 46.It Compaq SMART-2/E Controller 47.It Compaq SMART Controller 48.El 49.Sh SEE ALSO 50.Xr cam 4 , 51.Xr pass 4 , 52.Xr xpt 4 , 53.Xr camcontrol 8 . 54.Sh AUTHORS 55The 56.Nm 57driver was written by 58.An Jonathan Lemon Aq jlemon@FreeBSD.org 59and 60.An Matthew N. Dodd Aq mdodd@FreeBSD.org . 61This manual page was written by 62.An Tom Rhodes Aq trhodes@FreeBSD.org . 63