Enable the lock name to prevent a collision when HPDP tries to use the same physical device  in several backup sessions at the same time. Complete these steps as shown in Figure 16-6: 1. In this example, select the VTL_LTO3_01 drive from the  Drives  folder.  2. Click the  Settings  tab; you see your Default Media Pool, VTL_TAPE_ONSITE.  3. Click the  Advanced  tab; the Advanced Options window opens.  4. Click the  Other  tab and select the  Use Lock Name  check box. Figure 16-6 Enable lock name 16.2.4 Disabling compression, encryption, and CRC chksum Compression, encryption, hash-based application deduplication, cyclic redundancy check  (CRC) of data integrity, and other processes, affect the ProtecTIER deduplication factoring  ratio. Avoid using these techniques when the IBM ProtecTIER solution is implemented as a  component of your backup environment. Although HPDP offers these features, ensure that they are disabled for virtual tape devices  that provisioned by the ProtecTIER product. Figure 16-7 on page 236 shows how to  deactivate those options by clearing them:  1. Disable compression, encryption, and CRC by selecting a file system, in this example  FS_Daily_Incr.  3. Clear the  Software compression  and  Encode  check boxes. 2. Then, click the  Options  tab, and the Filesystem Options window opens.  Chapter 16. HP Data Protector  235