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

Converting Between Layered and Non-Layered Volumes
224 VERITAS Volume Manager Administrator’s Guide
The -o bg option restarts the relayout in the background. You can also specify the slow
and iosize option modifiers to control the speed of the relayout and the size of each
region that is copied. For example, the following command inserts a delay of 1000
milliseconds (1 second) between copying each 64-kilobyte region:
# vxrelayout -o bg,slow=1000,iosize=64 start vol04
The default delay and region size values are 250 milliseconds and 32 kilobytes
respectively.
To reverse the direction of relayout operation that is currently stopped, specify the
reverse keyword to vxrelayout as shown in this example:
# vxrelayout -o bg reverse vol04
This undoes changes made to the volume so far, and returns it to its original layout.
If you cancel a relayout using vxtask abort, the direction of the conversion is also
reversed, and the volume is returned to its original configuration.
See the vxrelayout(1M) and vxtask(1M) manual pages for more information about
these commands. See “Managing Tasks with vxtask” on page 187 for more information
about controlling tasks in VxVM.
Converting Between Layered and Non-Layered Volumes
The vxassist convert command transforms volume layouts between layered and
non-layered forms:
# vxassist [-b] convert volume [layout=layout] [convert_options]
Note If specified, the -b option makes conversion of the volume a background task.
The following conversion layouts are supported:
stripe-mirror—mirrored-stripe to striped-mirror
mirror-stripe—striped-mirror to mirrored-stripe
concat-mirror—mirrored-concatenated to concatenated-mirror
mirror-concat—concatenated-mirror to mirrored-concatenated
Volume conversion can be used before or after performing online relayout to achieve a
larger number of transformations than would otherwise be possible. During relayout
process, a volume may also be converted into a layout that is intermediate to the one that