Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

See “Mirroring (RAID-1)” on page 44.
■ Striping plus mirroring (mirrored-stripe or RAID-0+1)
See “Striping plus mirroring (mirrored-stripe or RAID-0+1)” on page 45.
■ Mirroring plus striping (striped-mirror, RAID-1+0 or RAID-10)
See “Mirroring plus striping (striped-mirror, RAID-1+0 or RAID-10)”
on page 46.
■ RAID-5 (striping with parity)
See “RAID-5 (striping with parity)” on page 47.
Concatenation, spanning, and carving
Concatenation maps data in a linear manner onto one or more subdisks in a plex.
To access all of the data in a concatenated plex sequentially, data is first accessed
in the first subdisk from beginning to end. Data is then accessed in the remaining
subdisks sequentially from beginning to end, until the end of the last subdisk.
The subdisks in a concatenated plex do not have to be physically contiguous and
can belong to more than one VM disk. Concatenation using subdisks that reside
on more than one VM disk is called spanning.
Figure 1-12 shows the concatenation of two subdisks from the same VM disk.
If a single LUN or disk is split into multiple subdisks, and each subdisk belongs
to a unique volume, this is called carving.
Understanding Veritas Volume Manager
Volume layouts in VxVM
38