1.\" $FreeBSD: src/share/man/man4/ida.4,v 1.1.2.2 2003/03/03 18:51:16 trhodes Exp $ 2.\" $DragonFly: src/share/man/man4/ida.4,v 1.2 2003/06/17 04:36:59 dillon Exp $ 3.\" Written by Tom Rhodes 4.\" This file is public domain 5.\" 6.Dd January 05, 2003 7.Dt IDA 4 8.Os 9.Sh NAME 10.Nm ida 11.Nd Compaq Intelligent Drive Array Controllers 12.Sh SYNOPSIS 13.Cd device scbus 14.Cd device ida 15.Sh DESCRIPTION 16The Compaq Intelligent Drive Array (IDA) technology is used to 17distribute data across an array of hard drives. 18It unites these hard drives into one or more high-performance logical drives. 19The drive array is managed by an array controller. 20.Pp 21These controllers have the ability to provide fault tolerance for the connected 22drives and optionally provide write cache for the logical drives. 23It is also possible for an application to access the SCSI bus subsystem 24directly by using the pass-through interface. 25.Pp 26The following controllers are supported by the 27.Nm 28driver: 29.Pp 30.Bl -item -compact 31.It 32Compaq SMART Array 221 33.It 34Compaq Integrated SMART Array Controller 35.It 36Compaq SMART Array 4200 37.It 38Compaq SMART Array 4250ES 39.It 40Compaq SMART 3200 Controller 41.It 42Compaq SMART 3100ES Controller 43.It 44Compaq SMART-2/DH Controller 45.It 46Compaq SMART-2/SL Controller 47.It 48Compaq SMART-2/P Controller 49.It 50Compaq SMART-2/E Controller 51.It 52Compaq SMART Controller 53.El 54.Sh IMPLEMENTATION NOTES 55Extreme caution should be exercised when using the pass-through interface. 56It is possible to interfere with normal system I/O and cause hangs if 57pass-through is used to an active device. 58Pass-through should only be used to a device that is otherwise quiescent. 59.Sh SEE ALSO 60.Xr cam 4 , 61.Xr pass 4 , 62.Xr xpt 4 , 63.Xr camcontrol 8 64.Sh AUTHORS 65.An -nosplit 66The 67.Nm 68driver was written by 69.An Jonathan Lemon Aq jlemon@FreeBSD.org 70and 71.An Matthew N. Dodd Aq mdodd@FreeBSD.org . 72This manual page was written by 73.An Tom Rhodes Aq trhodes@FreeBSD.org . 74