Exam 70-284

Chapter 7

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CHAPTER 7

Backup Methods

Backup Method	Description
Normal(full)	backs up db files (.edb, .stm, .log) archive bit cleared (denoting it has been backed up) transaction logs cleared longest backup fastest recovery
Copy	archive bit not cleared transaction logs not cleared
Incremental	backs up all data that has changed since last full backup. Archive bit cleared transaction logs cleared. lowest backup time, each nightly backup contains only what has changed since last incremental backup (as archive bit is cleared) highest recovery time, requiring full backup plus all nightly incremental backups
Differential	transaction logs not deleted. highest backup time, each subsequent backup requires more time than the previous instance 2nd fastest recovery time, only 2 tapes required, the full and the differential

Recovery Storage Group vs. Alternate Recovery Forest

Recovery Storage Group	Alternate Recovery Forest
Storage Group was originally located on an Exchange 2k3 or Exchange 2k SP3 or higher	Non-productive environment to backup and restore
Only one storage group can be recovered at a time, but any number of mailbox stores within that group can be selected	Supports volume shadow copy restore
Only one backup set can be used	Supports public folder restore
The storage group was originally located on an Exchange server in the same administrative group as the server hosting the recovery storage group	Can recover a purged mailbox after the mailbox deletion retention period has expired
Reduced storage downtime, user only affected when data is being moved
Only works if the servers with the original and recovery storage group are running the same exact version of Exchange
Public folders CANNOT be restored
If recovering a specific mailbox, the user account must still be in AD and must have a mailbox

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