VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

Placing Disks Under VxVM Control
60 VERITAS Volume Manager Administrator’s Guide
To remove support for X1 disks from ACME, use the following command:
# vxddladm rmjbod vid=ACME pid=X1
Placing Disks Under VxVM Control
When you add a disk to a system that is running VxVM, you need to put the disk under
VxVM control so that VxVM can control the space allocation on the disk. Unless another
disk group is specified, VxVM places new disks in the default disk group, rootdg.
The method by which you place a disk under VxVM control depends on the
circumstances:
◆ If the disk is new, it must be initialized and placed under VxVM control. You can use
the menu-based vxdiskadm utility to do this.
Caution Initialization destroys existing data on disks.
◆ If the disk is not needed immediately, it can be initialized (but not added to a disk
group) and reserved for future use. To do this, enter none when asked to name a disk
group. Do not confuse this type of “spare disk” with a hot-relocation spare disk.
◆ If the disk was previously initialized for future use by VxVM, it can be reinitialized
and placed under VxVM control.
◆ If the disk was previously used for a file system,VxVM prompts you to confirm that
you really want to destroy the file system.
◆ If the disk was previously in use by the LVM subsystem, you can preserve existing
data while still letting VxVM take control of the disk. This is accomplished using
conversion. With conversion, the virtual layout of the data is fully converted to VxVM
control (see the VERITAS Volume Manager Migration Guide).
◆ If the disk was previously in use by the LVM subsystem, but you do not want to
preserve the data on it, use the LVM command, pvremove, before attempting to
initialize the disk for VxVM.
◆ Multiple disks on one or more controllers can be placed under VxVM control
simultaneously. Depending on the circumstances, all of the disks may not be
processed the same way.
◆ When initializing multiple disks at once, it is possible to exclude certain disks or
controllers.
To exclude disks, list the names of the disks to be excluded in the file
/etc/vx/disks.exclude before the initialization. The following is an example of
the contents of a disks.exclude file:
c0t1d0