Using the Option › Implement Logical Block Protection

Implement Logical Block Protection

Logical Block Protection (LBP) is functionality offered by manufacturers of tape drives, such as IBM and HP, that lets Arcserve Backup detect read and write errors that occur on library drives under the following conditions:

• An error occurs during the process of writing the backup data to the media. For example, the data is corrupt.
• The backup data changed as it transmitted through the network or storage area network.

When an error occurs, the drive reports a SCSI error in the Tape Engine log file and the backup will fail.

The Arcserve Backup implementation of LBP does not support the following backups:

• LBP on Read operations
• Arcserve Tape RAID backups
• NAS (Network attached storage) backups
• Arcserve Backup UNIX/Linux Data Mover backups
• File system device backups

  Example: Data deduplication and staging backups

To implement LBP, you can create the registry key described in the following procedure. The registry entry can be created under the DEVICE<#> key in the registry for the library. When implemented on a library, LBP is enabled for all drives in the library. When the library resides on a SAN, you implement LBP for the library only on the Primary server, which lets you implement LBP for all Member servers that use the library.

Follow these steps:

1. Log in to the Arcserve Backup server
2. Open the following registry key:

   HKEY_LOCAL_MACHINE\SOFTWARE\ComputerAssociates\CA ARCServe Backup\Base\TapeEngine\DEVICE<#>
   

   Note: DEVICE# represents the number of the device where you want to implement LBP.

3. Create the following DWORD:

   LBP
   

4. Set the DWORD value of LBP to 1 and save the changes.

   Note: To disable LBP, set the DWORD value of LBP to 0.