BACKUP & RECOVERY - 2

  BACKUP AND RECOVERY INTERVIEW QUESTIONS AND ANSWERS
                                         PAGE - 2

11..Where are important  files to take a backup?

Important files are within the filesystem and which systems hold the most important data.

12..How long do we need to keeps this data?

Backups protect current data from accidents.

Backup  normally needed or useful only for a relatively short

period  upto maximum of 2 years

13..Where should  we have to  keep this backup?

 Recent backups are generally kept close

to the computer for quick restoration. Long term backups and archives should

be stored in a secure offsite location

14..When the data  will be restored?

At the time of emergency or  if we need to restore the data from backup

15..What is Unattended backups?

Unattended backups solve this problem for some sites. If the backup will fit on a single

tape, one approach is to leave a tape in the drive when you leave for the day, have the

backup command run automatically by cron during the night, and pick up the tape

the next morning.

16..What is the use of backup verification?

Data verification consists of a second pass through the backed-up data, in which

each file is compared to the version on disk, ensuring that the file was backed up correctly.

It also verifies that the media itself is readable.

17..Explan Write-protect backup media?

This prevents backup media from being accidentally

overwritten. The mechanism for write-protection varies with different media

types, but most mechanisms involve physically moving a plastic dial or tab to

some designated positions

18..Explain the functions of  Amanda ?

Amanda uses a combination of full and incremental backups to save all of the data

for which it is responsible, using the smallest possible daily backup set that can do

so. Its scheme first computes the total amount of data to be backed up. It uses this

total, along with a couple of parameters defined by the system administrator, to figure

out what to do in the current run

19..How to take  the full backup of /home  directory every day 5.30 pm every using?

#  vi   /etc/var/schedule

30  17  *  *  * /sbin/dump  -0u /dev/st0 /dev/hda7

crontab  /var/schedule

:wq!

# service crond restarat