I have a question when running the command:
vxresize -b -F vxfs -t erp_indexresize erp_index 20g proderp04

to resize the volume on an oracle database server is get the following errors:

UX:vxfs fsadm: ERROR: sectors must be >= 124859665 as they are currently
in use. vxvm:vxresize: ERROR: Problem running fsadm command for volume erp_index,
in diskgroup proderp_sandg deverpdb

Does the database need to be completely down or will a hot backup mode be
sufficient to grow this volume???

Any assistance is appreciated...