NAME¶
ciss
—
Common Interface for SCSI-3 Support driver
SYNOPSIS¶
To compile this driver into the kernel, place the following lines in your kernel
configuration file:
device scbus
device ciss
Alternatively, to load the driver as a module at boot time, place the following
line in
loader.conf(5):
DESCRIPTION¶
The
ciss
driver claims to provide a common
interface between generic SCSI transports and intelligent host adapters.
The
ciss
driver supports
CISS as defined in the document entitled
CISS Command Interface for SCSI-3 Support Open
Specification, Version 1.04, Valence Number 1, dated 2000/11/27,
produced by Compaq Computer Corporation.
We provide a shim layer between the
ciss
interface and
CAM(4), offloading most of the
queueing and being-a-disk chores onto CAM. Entry to the driver is via the PCI
bus attachment
ciss_probe
(),
ciss_attach
(), etc. and via the CAM
interface
ciss_cam_action
(), and
ciss_cam_poll
(). The Compaq
ciss
adapters require faked responses to
get reasonable behavior out of them. In addition, the
ciss
command set is by no means adequate to
support the functionality of a RAID controller, and thus the supported Compaq
adapters utilize portions of the control protocol from earlier Compaq adapter
families.
Currently
ciss
supports the
“simple” and “performant” transport layer.
Non-disk devices (such as internal DATs and devices attached to the external
SCSI bus) are supported as normal CAM devices provided that they are exported
by the controller firmware and are not marked as being masked. Masked devices
can be exposed by setting the
hw.ciss.expose_hidden_physical tunable to
non-zero at boot time. Direct Access devices (such as disk drives) are only
exposed as
pass(4) devices. Hot-insertion and
removal of devices is supported and notification messages will be reported to
the console and logs.
The problem which adapter freezes with the message “ADAPTER HEARTBEAT
FAILED” might be solved by updating the firmware and/or setting the
hw.ciss.nop_message_heartbeat tunable to
non-zero at boot time.
HARDWARE¶
Controllers supported by the
ciss
driver
include:
- Compaq Smart Array 5300 (simple mode only)
- Compaq Smart Array 532
- Compaq Smart Array 5i
- HP Smart Array 5312
- HP Smart Array 6i
- HP Smart Array 641
- HP Smart Array 642
- HP Smart Array 6400
- HP Smart Array 6400 EM
- HP Smart Array E200
- HP Smart Array E200i
- HP Smart Array P212
- HP Smart Array P220i
- HP Smart Array P222
- HP Smart Array P230i
- HP Smart Array P400
- HP Smart Array P400i
- HP Smart Array P410
- HP Smart Array P410i
- HP Smart Array P411
- HP Smart Array P420
- HP Smart Array P420i
- HP Smart Array P421
- HP Smart Array P430
- HP Smart Array P430i
- HP Smart Array P431
- HP Smart Array P530
- HP Smart Array P531
- HP Smart Array P600
- HP Smart Array P721m
- HP Smart Array P731m
- HP Smart Array P800
- HP Smart Array P812
- HP Smart Array P830
- HP Smart Array P830i
- HP Modular Smart Array 20 (MSA20)
- HP Modular Smart Array 500 (MSA500)
SEE ALSO¶
cam(4),
pass(4),
xpt(4),
loader.conf(5),
camcontrol(8)
CISS Command Interface for SCSI-3
Support Open Specification, Version 1.04, Valence Number 1,
Compaq Computer Corporation,
2000/11/27.
AUTHORS¶
The
ciss
driver was written by
Mike Smith
⟨msmith@FreeBSD.org⟩.
This manual page is based on his comments and was written by
Tom Rhodes
⟨trhodes@FreeBSD.org⟩.