HP XP Command View Advanced Edition Software - Manual (Page 282)

Figure 77 Transaction log backups after roll-forward (1)
• After performing roll-forward, use Application Agent to perform backup from the primary volume
to the secondary volume, and then obtain a backup of the transaction log files.
Figure 78 Transaction log backups after roll-forward (2)
In this case, when the second backup from the primary volume to the secondary volume is per-
formed, the contents of the secondary volume are updated. To perform restoration again, to the
secondary volume, the first backup from the primary volume to the secondary volume, first perform
restoration from the tape device to the secondary volume, and then perform restoration from the
secondary volume to the primary volume.
An error will occur if you try to back up the transaction log files without backing up the primary
volume to the secondary volume.
Operation for SQL Server databases 282