1.\" $FreeBSD: src/share/man/man4/ida.4,v 1.1.2.2 2003/03/03 18:51:16 trhodes Exp $ 2.\" Written by Tom Rhodes 3.\" This file is public domain 4.\" 5.Dd December 10, 2014 6.Dt IDA 4 7.Os 8.Sh NAME 9.Nm ida 10.Nd Compaq Intelligent Drive Array Controllers 11.Sh SYNOPSIS 12.Cd device scbus 13.Cd device ida 14.Sh DESCRIPTION 15The Compaq Intelligent Drive Array (IDA) technology is used to 16distribute data across an array of hard drives. 17It unites these hard drives into one or more high-performance logical drives. 18The drive array is managed by an array controller. 19.Pp 20These controllers have the ability to provide fault tolerance for the connected 21drives and optionally provide write cache for the logical drives. 22It is also possible for an application to access the SCSI bus subsystem 23directly by using the pass-through interface. 24.Pp 25The following controllers are supported by the 26.Nm 27driver: 28.Pp 29.Bl -item -compact 30.It 31Compaq SMART Array 221 32.It 33Compaq Integrated SMART Array Controller 34.It 35Compaq SMART Array 4200 36.It 37Compaq SMART Array 4250ES 38.It 39Compaq SMART 3200 Controller 40.It 41Compaq SMART 3100ES Controller 42.It 43Compaq SMART-2/DH Controller 44.It 45Compaq SMART-2/SL Controller 46.It 47Compaq SMART-2/P Controller 48.It 49Compaq SMART-2/E Controller 50.It 51Compaq SMART Controller 52.El 53.Sh IMPLEMENTATION NOTES 54Extreme caution should be exercised when using the pass-through interface. 55It is possible to interfere with normal system I/O and cause hangs if 56pass-through is used to an active device. 57Pass-through should only be used to a device that is otherwise quiescent. 58.Sh FILES 59.Bl -tag -width ".Pa /dev/idadX" -compact 60.It Pa /dev/idadX 61.Nm 62device nodes 63.El 64.Sh SEE ALSO 65.Xr cam 4 , 66.Xr pass 4 , 67.Xr xpt 4 , 68.Xr camcontrol 8 69.Sh AUTHORS 70.An -nosplit 71The 72.Nm 73driver was written by 74.An Jonathan Lemon Aq Mt jlemon@FreeBSD.org 75and 76.An Matthew N. Dodd Aq Mt mdodd@FreeBSD.org . 77This manual page was written by 78.An Tom Rhodes Aq Mt trhodes@FreeBSD.org . 79