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Manual Pages  — IDA

NAME

ida – Compaq Intelligent Drive Array Controllers

CONTENTS

SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file: device scbus device ida

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

ida_load="YES"

DESCRIPTION

The Compaq Intelligent Drive Array (IDA) technology is used to distribute data across an array of hard drives. It unites these hard drives into one or more high-performance logical drives. The drive array is managed by an array controller.

These controllers have the ability to provide fault tolerance for the connected drives and optionally provide write cache for the logical drives. It is also possible for an application to access the SCSI bus subsystem directly by using the pass-through interface.

HARDWARE

The following controllers are supported by the ida driver:

IMPLEMENTATION NOTES

Extreme caution should be exercised when using the pass-through interface. It is possible to interfere with normal system I/O and cause hangs if pass-through is used to an active device. Pass-through should only be used to a device that is otherwise quiescent.

SEE ALSO

cam(4), pass(4), xpt(4), camcontrol(8)

AUTHORS

The ida driver was written by Jonathan Lemon <Mt jlemon@FreeBSD.org> and Matthew N. Dodd <Mt mdodd@FreeBSD.org>. This manual page was written by Tom Rhodes <Mt trhodes@FreeBSD.org>.

IDA (4) August 8, 2004

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