How SnapManager checks database integrity in backup sets

SnapManager uses ChkSgFiles.dll, an integrity verification library, to verify the Exchange Server 2007 databases and transaction logs. SnapManager uses Eseutil, a Microsoft Exchange utility, to verify the Exchange Server 2003 database files. SnapManager uses either ChkSgFiles or Eseutil to verify the page-level integrity of the databases.

The Eseutil utility is installed automatically with binaries. SnapManager checks the database and the transaction logs for physical-level corruption. For more information about physical-level corruption, see your Microsoft Exchange documentation.

The ChkSgFiles.dll library checks the databases and transaction log files for physical and logical corruption, by using checksum verification. You must install Exchange Server 2007 Management Tools on the server that performs integrity verification.

• LUN requirements for verifying databases in a backup set
  SnapManager requires that all databases be mounted before verification. The SnapManager verification server must have enough drive letters or mountpoints to mount the LUNs that store the backup sets that you verify, depending on your verification scenario.
• Database verification load management
  If you run database verification on a production server, it can place a significant load on both the server and the storage systems. This degrades Exchange response, particularly during peak work hours. There are four methods to manage database verification load.
• Backup verification status reporting
  You can use SnapManager Restore to determine the verification status of each backup and of the transaction logs for each backup.
• Where to run database and transaction log integrity verification
  Regardless of when you verify the databases in a backup set, you can perform the verification either on the production server or on a remote verification system.
• When to verify the databases in a backup set
  You can verify the databases in your SnapManager backup sets immediately after creation, at a scheduled time later, or when you restore them.