VERITAS Volume Manager 3.1 Migration Guide

VxVM and LVM
VxVM and LVM—Conceptual Comparison
Chapter 1 21
In LVM, exporting removes volume group information from /etc/lvmtab. The
volume group must have already been deactivated.
Similarly in VxVM, deport makes a disk group inaccessible by the system.
Import Import
In LVM, import adds a volume group to the system and the volume group
information to /etc/lvmtab but does not make the volumes accessible. The volume
group must be activated by the vgchange -a y command in order to make volumes
accessible.
In VxVM, import imports a disk group and makes the diskgroup accessible by the
system.
Bad Block Pool No similar term
In LVM, the bad block pool provides for the transparent detection of bad disk
sectors, and the relocation of data from bad to good disk sectors. The bad block
reallocation feature does not exist in VxVM because the vectoring of bad blocks is
now done by most hardware.
/etc/lvmtab No similar term
/etc/lvmtab is an LVM file that contains information about volume groups that
are accessible by a system.
Table 1-1A Conceptual comparison of LVM and VxVM
LVM Term VxVM Term