VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

Creating a Volume on Specific Disks
168 VERITAS Volume Manager Administrator’s Guide
This command mirrors column 1 across disk01 and disk03, and column 2 across
disk02 and disk04 as illustrated in “Example of using Ordered Allocation to Create a
Striped-Mirror Volume” on page 168.
Example of using Ordered Allocation to Create a Striped-Mirror Volume
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:
# vxassist -b -o ordered make strmir2vol 10g layout=mirror-stripe \
ncol=2 col_switch=3g,2g disk01 disk02 disk03 disk04 \ disk05
disk06 disk07 disk08
This command allocates 3 gigabytes from disk01 and 2 gigabytes from disk02 to
column 1, and 3 gigabytes from disk03 and 2 gigabytes from disk04 to column 2. The
mirrors of these columns are then similarly formed from disks disk05 through disk08.
This arrangement is illustrated in“Example ofUsing ConcatenatedDisk Space to Create a
Mirrored-Stripe Volume.”
Example of Using Concatenated Disk Space to Create a Mirrored-Stripe Volume
Mirror
Striped-Mirror Volume
Underlying Mirrored Volumes
Column 1
Column 1
Column 2
Column 2
disk01-01
disk03-01
disk02-01
disk04-01
Striped Plex
Mirrored-Stripe Volume
Striped Plex
Striped Plex
Mirror
Column 1
Column 1
Column 2
Column 2
disk01-01
disk02-01
disk05-01
disk06-01
disk03-01
disk04-01
disk07-01
disk08-01