TrueCopy for Mainframe supports the IBM® PPRC dynamic address switching (P/DAS) host software function. P/DAS allows you to relocate or migrate data by redirecting all application I/Os from the P-VOL to the S-VOL without interrupting access to the data. For important information about the requirements and procedures for P/DAS operations, see the following IBM® publications: Planning for IBM Remote Copy (SG24-2595), Advanced Copy Services (SC35-0355), DFSMS MVS V1 Remote Copy Guide and Reference (SC35-0169).