man : iopctl(8)
IOPCTL(8) OpenBSD System Manager's Manual IOPCTL(8)
iopctl - a program to control IOP devices
iopctl [-f device] command [tid]
The iopctl command can be used to interrogate and control I2O devices.
The following options are available:
-f device Specify the control device to use. The default is
The following commands are available:
Reconfigure the IOP: ask all bus ports to rescan their buses, and
attach or detach devices to and from the system as necessary.
Retrieve and display the DDM (device driver module) identity
parameter group from the specified target.
Retrieve and display the device identity parameter group from the
Display the driver's private copy of the logical configuration
table. This copy of the LCT matches the current device
configuration, but is not necessarily the latest available
version of the LCT.
Display the current status of the IOP.
Display the device to TID map.
/dev/iopu control device for IOP unit u
ioctl(2), iop(4), ioprbs(4), iopsp(4), sd(4)
The iopctl command first appeared in NetBSD 1.6, OpenBSD support was
added in OpenBSD 3.0.
The iopctl command was written by Andrew Doran <adATnetbsd.org>, and
ported to OpenBSD by Michael Shalayeff <mickeyATopenbsd.org>.
OpenBSD 4.9 June 26, 2008 OpenBSD 4.9