VERITAS Volume Manager 4.1 Administrator's Guide

Creating and Administering Subdisks
Splitting Subdisks
Chapter 5202
Splitting Subdisks
Splitting a subdisk divides an existing subdisk into two separate
subdisks. To split a subdisk, use the following command:
# vxsd –s size split subdisk newsd1 newsd2
where subdisk is the name of the original subdisk, newsd1 is the name of
the first of the two subdisks to be created and newsd2 is the name of the
second subdisk to be created.
The –s option is required to specify the size of the first of the two
subdisks to be created. The second subdisk occupies the remaining space
used by the original subdisk.
If the original subdisk is associated with a plex before the task, upon
completion of the split, both of the resulting subdisks are associated with
the same plex.
To split the original subdisk into more than two subdisks, repeat the
previous command as many times as necessary on the resulting
subdisks.
For example, to split subdisk disk03-02, with size 2000 megabytes into
subdisks disk03-02, disk03-03, disk03-04 and disk03-05, each with size
500 megabytes, use the following commands:
# vxsd -s 1000m split disk03-02 disk03-02 disk03-04
# vxsd -s 500m split disk03-02 disk03-02 disk03-03
# vxsd -s 500m split disk03-04 disk03-04 disk03-05