Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

If the arrays remain physically connected to the host after support has been
removed, they are listed in the OTHER_DISKS category, and the volumes remain
available.
To remove support for a disk array
◆
Type the following command (in this example, the vrtsda ASL is being
removed):
# swremove vrtsda
Third-party driver coexistence
The third-party driver (TPD) coexistence feature of VxVM allows I/O that is
controlled by some third-party multipathing drivers to bypass DMP while retaining
the monitoring capabilities of DMP. If a suitable ASL is available and installed,
devices that use TPDs can be discovered without requiring you to set up a
specification file, or to run a special command. In previous releases, VxVM only
supported TPD coexistence if the code of the third-party driver was intrusively
modified. The new TPD coexistence feature maintains backward compatibility
with such methods, but it also permits coexistence without require any change
in a third-party multipathing driver.
See “Changing device naming for TPD-controlled enclosures” on page 103.
See “Displaying information about TPD-controlled devices” on page 162.
How to administer the Device Discovery Layer
The Device Discovery Layer (DDL) allows dynamic addition of disk arrays. DDL
discovers disks and their attributes that are required for VxVM and DMP
operations.
The DDL is administered using the vxddladm utility to perform the following tasks:
■ List the hierarchy of all the devices discovered by DDL including iSCSI devices.
■ List all the Host Bus Adapters including iSCSI
■ List the ports configured on a Host Bus Adapter
■ List the targets configured from a Host Bus Adapter
■ List the devices configured from a Host Bus Adapter
■ Get or set the iSCSI operational parameters
■ List the types of arrays that are supported.
■ Add support for an array to DDL.
85Administering disks
Discovering and configuring newly added disk devices