An HP-UX 9000/800 host currently uses multi-pathed storage provisioned from a Symmetrix 8830.
All LUNs are presented to the host application using Veritas Volume Manager. The storage array
is being replaced by a DMX1000. This will require a data migration effort. The host is running
several 24×7 applications and needs to be online during the migration.
Two approaches are being considered host-based mirror/split of the Veritas volumes or arraybased SRDF. What is a disadvantage of using host-based volume mirroring for the migration?

A.
The volume copy process requires four block writes for every block read

B.
Consumes host CPU cycles and I/O resources, this could adversely impact applications

C.
Requires lots of internal disks, where writes are buffered until initial sync is complete

D.
Could result in corruptedfilesystems with write-intensive workloads during the migration