Backup Considerations
- The following are supported for hidden volume:
- Windows Agent-based Backup
- Host-based VM Backup
- UNC Backup
- Instant Virtual Machine
- Virtual Standby
- File Copy/Archive
- Copy Recovery Point
- Mount Recovery Point
- RPS Jumpstart
- Import Datastore
- Replication
- Remote Replication
- When the first full backup of a database completes, it may generate a warning message about a few archive logs not being found. As a workaround, take the full backup once again to enable UDP consistent backup for the application.
- When integrating the Arcserve UDP Agent (Windows) with Arcserve Continuity Suite or Arcserve Replication and High Availability for data replication, you may discover that a greater quantity of data is replicated from the master Server to the replica Server than the actual file size on the master Server. This behavior is known to occur when using the non-compressed and non-encrypted backup option. To minimize the effects of this behavior, you can configure the backup scenarios to replicate periodically.
- Starting with Microsoft Exchange Server 2013, all public folders are stored under specially designed public mailboxes folder in the Mailbox database. Therefore, to back up public folders, back up the corresponding Mailbox database.
- When you back up a Microsoft SQL instance from machine A and restore the same to machine B, the following are the instances that may fail on the machine after the restore:
- The Microsoft SQL instance on either machine A or machine B is on Windows authentication.
- The Database master is included in the restore list.
- To avoid possible failures (mainly for large backup jobs), the buffering I/O settings have been turned off by default. However, turning buffering off can lead to a corresponding drop or slowdown in the backup speed (I/O throughput). If you are performing small backup jobs and want to increase the job performance, manually turn on buffering using the following steps:
- Locate and open the afstor.ini file available in the following path:
- C:\Program Files\Arcserve\Unified Data Protection\Engine\Configuration
- Modify the following three buffering settings from 0 (off) to 1 (on):
- BufferingForLocal=0
- BufferingForUSB=0
- BufferingForRemoteFolder=0
- The actions or configurations below may affect the size of the block-level backups because Arcserve UDP Agent (Windows) or the Host-based VM backup continues to incrementally back up all modified blocks. At that instance, the blocks that are shifted due to those actions or configurations are also included in the backup, even if no data is modified in the files. As a result, the backup size may increase. This behavior is expected. If you do not want the increased backup size, you can stop any schedules for defragmentation or exclude affected volumes for Arcserve UDP Agent (Windows).
- Note: Volume exclusion is not applicable to Host-based VM backup.
- The actions or configurations are listed below:
- Volume defragmentation
- Volume is NTFS deduplication enabled
- System activities, such as page file or hibernation file IO (Applicable to the Host-based VM backup only)
- When using multiple backup destinations with the Arcserve UDP Recovery Point View on a single Arcserve UDP Agent (Windows) node if you modify one destination back to the normal Windows view then all the volumes mounted by Explorer Extension are forced to dismount. To avoid this problem, you should delay modifying views until you have used all destinations that are shown in the Arcserve UDP Recovery Point View.
Note: Only valid for non-data store destinations.
- When a backup job is running, do not shrink the volume that is being backed up. If you shrink the volume during the backup, data from this session is not used for data recovery. Verify the backup afterwards to ensure the data integrity.
- If you are backing up volumes that were replicated using Arcserve Continuity Suite or Arcserve Replication and High Availability, verify that the spool is created on a separate volume and configure your backup settings to exclude the spool volume. As a result, you can avoid backing up unnecessary temp spool data.
- After a Microsoft Exchange 2010 database backup if the backup is moved to a different location then perform the restore for the session that is backed up before moving to the failed path.
- If both compression and encryption are disabled, then Arcserve UDP Agent (Windows) can only back up the files in .VHD format, and cannot back up the files in .VHDX format.
Note: Valid for non-data store destinations when the backup format is set to Standard.
- When Arcserve UDP Agent (Windows) backs up a Hyper-V Server, the VMs might proceed to the Saved state for a short time when the backup job starts. This state may lead the VM into a temporary offline status and is back online within a few seconds. To prevent this state, the VM should meet certain conditions.
Note: For more information, see link.
- Random data corruption is observed when backups are written to the following device and if the network connection is lost during backup or merge jobs:
- Iomega StorCenter ix4-200d
Note: Valid for non-data store destinations when the backup format is set to Standard.
- Arcserve Backup integration feature with Arcserve UDP 9.0 requires download of Arcserve Backup 19.0 using single installer or Arcserve Backup individual download link.