IDA(4) BSD Kernel Interfaces Manual IDA(4)NAMEida — Compaq Intelligent Drive Array Controllers
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:
· Compaq SMART Array 221
· Compaq Integrated SMART Array Controller
· Compaq SMART Array 4200
· Compaq SMART Array 4250ES
· Compaq SMART 3200 Controller
· Compaq SMART 3100ES Controller
· Compaq SMART-2/DH Controller
· Compaq SMART-2/SL Controller
· Compaq SMART-2/P Controller
· Compaq SMART-2/E Controller
· Compaq SMART Controller
IMPLEMENTATION NOTES
Extreme caution should be exercised when using the pass-through inter‐
face. 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 ALSOcam(4), pass(4), xpt(4), camcontrol(8)AUTHORS
The ida driver was written by Jonathan Lemon ⟨jlemon@FreeBSD.org⟩ and
Matthew N. Dodd ⟨mdodd@FreeBSD.org⟩. This manual page was written by Tom
Rhodes ⟨trhodes@FreeBSD.org⟩.
BSD August 8, 2004 BSD
