Veritas Volume Manager 5.1 SP1 Administrator"s Guide (5900-1506, April 2011)

Figure 8-1
Example of using ordered allocation to create a mirrored-stripe
volume
Striped
plex
Mirror
column 1
mydg01-01 mydg02-01 mydg03-01
column 2 column 3
column 1 column 2 column 3
Mirrored-stripe
volume
mydg04-01 mydg05-01 mydg06-01
Striped
plex
For layered volumes, vxassist applies the same rules to allocate storage as for
non-layered volumes. For example, the following command creates a striped-mirror
volume with 2 columns:
# vxassist -b -g mydg -o ordered make strmirvol 10g \
layout=stripe-mirror ncol=2 mydg01 mydg02 mydg03 mydg04
This command mirrors column 1 across disks mydg01 and mydg03, and column 2
across disks mydg02 and mydg04.
Figure 8-2 shows an example of using ordered allocation to create a striped-mirror
volume.
Figure 8-2
Example of using ordered allocation to create a striped-mirror
volume
Striped plex
Mirror
column 1
mydg01-01 mydg02-01
column 2
column 1 column 2
Mirrored-stripe
volume
Underlying mirrored volumes
mydg03-01 mydg04-01
Additionally, you can use the col_switch attribute to specify how to concatenate
space on the disks into columns. For example, the following command creates a
mirrored-stripe volume with 2 columns:
309Creating volumes
Creating a volume on specific disks