1.\" Written by Tom Rhodes 2.\" This file is public domain 3.\" 4.Dd February 15, 2017 5.Dt IDA 4 6.Os 7.Sh NAME 8.Nm ida 9.Nd Compaq Intelligent Drive Array Controllers 10.Sh SYNOPSIS 11To compile this driver into the kernel, 12place the following lines in your 13kernel configuration file: 14.Bd -ragged -offset indent 15.Cd "device scbus" 16.Cd "device ida" 17.Ed 18.Pp 19Alternatively, to load the driver as a 20module at boot time, place the following line in 21.Xr loader.conf 5 : 22.Bd -literal -offset indent 23ida_load="YES" 24.Ed 25.Sh DESCRIPTION 26The Compaq Intelligent Drive Array (IDA) technology is used to 27distribute data across an array of hard drives. 28It unites these hard drives into one or more high-performance logical drives. 29The drive array is managed by an array controller. 30.Pp 31These controllers have the ability to provide fault tolerance for the connected 32drives and optionally provide write cache for the logical drives. 33It is also possible for an application to access the SCSI bus subsystem 34directly by using the pass-through interface. 35.Sh HARDWARE 36The following controllers are supported by the 37.Nm 38driver: 39.Pp 40.Bl -bullet -compact 41.It 42Compaq SMART Array 221 43.It 44Compaq Integrated SMART Array Controller 45.It 46Compaq SMART Array 4200 47.It 48Compaq SMART Array 4250ES 49.It 50Compaq SMART 3200 Controller 51.It 52Compaq SMART 3100ES Controller 53.It 54Compaq SMART-2/DH Controller 55.It 56Compaq SMART-2/SL Controller 57.It 58Compaq SMART-2/P Controller 59.El 60.Sh IMPLEMENTATION NOTES 61Extreme caution should be exercised when using the pass-through interface. 62It is possible to interfere with normal system I/O and cause hangs if 63pass-through is used to an active device. 64Pass-through should only be used to a device that is otherwise quiescent. 65.Sh SEE ALSO 66.Xr cam 4 , 67.Xr pass 4 , 68.Xr xpt 4 , 69.Xr camcontrol 8 70.Sh AUTHORS 71.An -nosplit 72The 73.Nm 74driver was written by 75.An Jonathan Lemon Aq Mt jlemon@FreeBSD.org 76and 77.An Matthew N. Dodd Aq Mt mdodd@FreeBSD.org . 78This manual page was written by 79.An Tom Rhodes Aq Mt trhodes@FreeBSD.org . 80