Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

48 Understanding Veritas Volume Manager
Volume layouts in VxVM
mirror (plex) covers a smaller area of storage space, so recovery is quicker than with a
standard mirrored volume.
Figure 1-25 Example of a striped-mirror layered volume
Figure 1-25 illustrates the structure of a typical layered volume. It shows subdisks with
two columns, built on underlying volumes with each volume internally mirrored. The
volume and striped plex in the “Managed by User” area allow you to perform normal tasks
in VxVM. User tasks can be performed only on the top-level volume of a layered volume.
Underlying volumes in the “Managed by VxVM” area are used exclusively by VxVM and
are not designed for user manipulation. You cannot detach a layered volume or perform
any other operation on the underlying volumes by manipulating the internal structure. You
mirrored
VM disks
Underlying
Subdisks
Striped plex
Striped-mirror
vol01-01
vol01
Concatenated
Managed
Managed
Subdisks on
disk04-01
disk05-01 disk06-01 disk07-01
vop01 vop02
volumes
plexes
vol01-01
Column 1Column 0
disk06-01
disk07-01
disk04-01
disk05-01
volume
vop01 vop02
by User
by VxVM