Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Chapter 2, Administering Disks

Discovering and Configuring Newly Added Disk Devices

described in “Displaying and Changing Default Disk Layout Attributes” on page 77. See

the vxdisk(1M) manual page for details of the usage of this file, and for more

information about disk types and their configuration.

Discovering and Configuring Newly Added Disk Devices

When you physically connect new disks to a host or when you zone new fibre channel

devices to a host, you can use the vxdctl command to rebuild the volume device node

directories and to update the DMP internal database to reflect the new state of the system.

To reconfigure the DMP database, first run ioscan followed by insf to make the

operating system recognize the new disks, and then invoke the vxdctl enable

command. See the vxdctl(1M) manual page for more information.

You can also use the vxdisk scandisks command to scan devices in the operating

system device tree and to initiate dynamic reconfiguration of multipathed disks. See the

vxdisk(1M) manual page for more information.

Partial Device Discovery

The Dynamic Multipathing (DMP) feature of VxVM supports partial device discovery

where you can include or exclude sets of disks or disks attached to controllers from the

discovery process.

The vxdisk scandisks command re-scans the devices in the OS device tree and triggers

a DMP reconfiguration. You can specify parameters to vxdisk scandisks to implement

partial device discovery. For example, this command makes VxVM discover newly added

devices that were unknown to it earlier:

# vxdisk scandisks new

The next example discovers fabric devices:

# vxdisk scandisks fabric

The following command scans for the devices c1t1d0 and c2t2d0:

# vxdisk scandisks device=c1t1d0,c2t2d0

Alternatively, you can specify a ! prefix character to indicate that you want to scan for all

devices except those that are listed:

# vxdisk scandisks !device=c1t1d0,c2t2d0

You can also scan for devices that are connected (or not connected) to a list of logical or

physical controllers. For example, this command discovers and configures all devices

except those that are connected to the specified logical controllers:

# vxdisk scandisks !ctlr=c1,c2