Backup & Restore:

1. Backup is taken for the recovery of data if deleted or modified.
2. Backup file has .bkf extension.
3. Users of administrators, backup operators group (or users with full permission of data) can take and restore backup.

Backup can be taken in two modes:     

1. Wizard mode
2. Advanced mode

SSD:  It store collection of specific system configuration information. It consist of

1. Registry
2. Boot files
3. Com + class registration data base
4. Active directory      (if a DC)
5. Sysvol folder          (if a DC)
6. Certificates services (if a Certificate Server)

Backup Facts
Most backup methods use the archive attribute on a file to identify files that need to be backed up. When a file is modified, the system automatically set the archive attribute. When the file is backed up, the backup method may clear the archive bit to indicate it has been backed up.

 

The following table shows the type of data backed up using each backup method:

Backup Type	Backs Up	Clear Archive Bit?
Full	Back up all files regardless of the archive bit.	Yes
Incremental	Back up only those files (modified and new files since previous backup) where archive bit is set.	Yes
Differential	Back up only those files (modified and new files since previous backup) where archive bit is set	No
Copy	Back up all files regardless of the archive bit status.	No
Daily	Back up all files modified that day.	No

 

How to take backup:

• Start
• Program
• accessories
• system tools
• backup
  

or                   
Run: ntbackup

Note:
In an organization every Monday take normal backup & rest days of week take incremental backup is best method, and last day of week we take differential backup.

How to take back up of SSD:
If we want to take back up of particular object or active directory, we have to take backup of entire SSD.
Steps:

1. open backup wizard
2. select backup of SSD option
3. give destination to store destination to store backup file
4. click start backup.

To restore SSD on DC:
During startup PC Press F8 key and select Directory Services Restore Mode option – open backup wizard – select restore option and specify path from restore option – click restore and restart.

Note: if we have more than one DC (GCS & ADC) then start computer in directory service restore mode (DSRM) and go to prompt and type:
C:\>ntdsutil
authoritative  restore
restore  database
yes
& restart your computer.

Authoritative restore:
It means replication (backup) of particular objects from database of SSD.
eg. System boot file corrupt or any of the particular object of SSD then this mode of restore will run.

Non-authoritative restore:
It means replication of entire database of SSD.
Syntax
:nonauthoritative   restore

ASR (Automated System Recovery)
In windows xp and 2003 server included a new feature in the backup utility called automated system recovery (ASR)
It is used for system recovery as well as programe in the event of system boot failure.
ASR back up system state data (SSD), system services and disk configuration information.

How to take ASR backup:

1. Open backup wizard
2. click ASR button
3. next
4. specify location to restore backup
5. next
6. finish
7. insert a blank floppy disk
8. ok
9. ok

In floppy disk – some file contains:

• config.nt                       
• autoexec.nt                 
• setup.log