HP XP7 Replication Manager Application Agent CLI User Guide (TK981-96015, May 2014)

• Since the number of log files might increase during backup operations by VSS, when you perform
backup by using VSS, the backup results might contain a log file that has not been recorded in
the catalog.
• Set the environment of Application Agent to use VSS. For details on environment settings required
to use VSS, see “Specifying settings for using VSS” on page 146.
• The Information Stores of the storage group that are to be backed up must all be mounted in ad-
vance.
• When Protection Manager version 4.4 or earlier is used to back up storage groups, the Information
Stores of storage groups to be restored must all be mounted in advance. When Protection Manager
version 5.5 is used, the Information Stores do not need to be mounted in advance in order to be
restored.
• If the name of the Exchange database has been changed, you must perform the following opera-
tions:
• For Exchange Server 2007, unmount and then remount all of the Information Stores in the rel-
evant storage group.
• For Exchange Server 2010 or Exchange Server 2013, unmount and then remount the Inform-
ation Stores.
• Do not use LUN#0 as a secondary volume for the backup destination. If the LUN#0 disk is used
as a secondary volume for the backup destination, other disks might not be recognized.
• When data is backed up, a folder named DRMVSSMETADATA_backup-ID is created in the root
directory of the secondary volume. Do not delete this folder, as a backup metadata file necessary
for restoration is stored in it. This folder is automatically deleted after data has been restored.
• Do not mount another volume in a directory on the volume to be backed up. If another volume is
mounted, mounting and restoration for the secondary volume might fail.
• It might take a long time to execute the backup command for VSS backup, because the VSS import
server verifies the backup result database. The time required to verify the database depends on
factors such as the database capacity, the backup server's machine performance, and disk per-
formance. Also, an option can be specified in the drmexgbackup or EX_DRM_EXG_BACKUP
command used for completing the backup operation without verifying the database. If you omit
the verification, HP recommends that you use the drmexgverify or EX_DRM_EXG_VERIFY
command to verify the database before performing restoration or backing up data to tape.
Note that, although an option is provided for the drmexgbackup or EX_DRM_EXG_BACKUP
command to delete transaction logs after backup without verification, if this option is used when
the database is corrupted, roll-forward recovery might not be able to be performed.
• The following are the files verified during database verification when backup is performed by using
VSS:
• Data files in the Information Store (*.edb)
• Transaction log files that have not been committed (*.log)
• Note on approximate periods required for database verification when a backup is performed by
using VSS:
• The table below lists the approximate amount of time required to verify a database. Note that
the approximate amount listed in the table only apply under certain conditions, and are not a
guarantee product performance.
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