VERITAS Volume Manager 5.0 Migration Guide (September 2006)

53Command differences
Comparison of LVM and VxVM tasks
Comparison of LVM and VxVM tasks
This section contains a list of tasks which you can perform using LVM, and near
equivalent tasks which you can perform using Veritas Volume Manager. You can perform
the LVM tasks by using SAM or the command line interface. Similarly, you can choose to
perform VxVM tasks by using the Veritas Enterprise Administrator (VEA) or the
command line interface. This document focuses on the command line interface.
Note: The following features in VxVM require an additional license: Mirroring, Mirroring
and Striping, Dynamic Multipathing of Active/Active Devices, Hot-relocation, Online
Migration, and RAID-5.
All the VxVM tasks listed in the task comparison chart can be performed by the Veritas
Enterprise Administrator. For more information, refer to the Veritas Enterprise
Administrator User’s Guide.
For more information on LVM commands, refer to HP-UX Managing Systems and
Workgroups, and LVM manual pages in the Reference Volumes 2, 3, and 5. For
information on VxVM commands, refer to the Veritas Volume Manager documentation
package.
Note: Mirroring of a VxVM root disk is supported in this release.
Mirroring in LVM is supported only if you have MirrorDisk/UX already installed as an
add-on product. In addition, mirroring in VxVM requires an additional license.
Table 3-2 LVM and VxVM task comparison
Task
type
Description Example
LVM Create an LVM disk. pvcreate /dev/rdsk/disk_name
VxVM Bring a disk under Volume Manager
control.
vxdiskadd device_name
Option 1 in the vxdiskadm menu adds a disk
and initializes it.
LVM Create a volume group vgcreate /dev/vol_grp /dev/dsk/
disk_name
Example for a disk_group = veritasdg, medianame = disk01, vol_name -= veritasvol, plex name =
veritasvol-01, subdisk -= disk01-01, devicename = c0t0d0.