VERITAS Volume Manager 3.5 Migration Guide (September 2004)

Chapter 1
VxVM and LVM
VxVM and LVM—Conceptual Comparison
6
Export Deport
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 a file that contains information about volume groups that are accessible by a system.
Table 1-1 A Conceptual comparison of LVM and VxVM (Continued)
LVM Term VxVM Term