VERITAS Volume Manager 4.1 Administrator's Guide

Administering Disks

Conﬁguring Newly Added Disk Devices

Chapter 268

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 attaced 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:

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

The next command discovers devices that are connected to the speciﬁed physical controller:

# vxdisk scandisks pctlr=8/12.8.0.255.0