You are the messaging engineer for your company.
You plan to deploy Exchange Server 2007. You have purchased a backup system that supports streaming backups to a tape device.
You need to recommend a disaster recovery plan for Mailbox servers that meets the following requirements:
Loss of data must be limited to four hours or less in the event of a complete server failure.
Transaction logs on Mailbox servers must be deleted only once each day.
Only the disk storage available on the existing Mailbox servers must be used.
Which two elements should your disaster recovery plan include? (Each correct answer presents part of the solution. Choose two.)
A.
Perform a full backup every night.
B.
Perform a copy backup every night.
C.
Perform a differential backup every four hours.
D.
Perform an incremental backup every four hours.
E.
Enable circular logging on all storage groups.
F.
Implement local continuous replication on all storage groups.
Explanation:
1. Data loss must be limited to at most 4 hours. Requires C and eliminates E.2. Mailbox server T-logs must be deleted only once each day. Requires A and eliminates B,D, and E.
3. Only available disk storage on existing Mailbox servers must be used. Eliminates F.
Circular logging (by default, disabled) allows Exchange to overwrite T-log files after their data has been committed to the database. By enabling this feature, you reduce drive storage space requirements. However, without a complete set of T-logs, you cant recover any data more recent than the last full backup. Thus, circular logging not recommended in a production environment.
http://technet.microsoft.com/en-us/library/bb331968.aspx