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System Backup

Version A.01H3064S Module 13 Slides

2 © 1999 Hewlett-Packard Co.

H3064S A.01

Why Back Up?

How Much Data Can You Afford To Lose? Data is sometimes lost by:

• File system corruption• Accidental removal of files• Hardware failures• System crash

Regular backups:• Minimize data loss• Keep users happy• Provide stability and order

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3 © 1999 Hewlett-Packard Co.

H3064S A.01

What Do You Back Up?

• Backup the entire file system (full backup)• Backup part of the file system

– Files that have changed since the last backup (incremental or delta backups)

– A subtree of the file system – Application data– Users' files

• Backup the database configuration • Backup the LVM configuration

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4 © 1999 Hewlett-Packard Co.

H3064S A.01

How Often Do You Back Up?

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Fri Mon Tues Wed Thurs

100%

5 © 1999 Hewlett-Packard Co.

H3064S A.01

How Do You Perform the Backup?

Backupsand

Archives

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• fbackup/frecover are the most flexible standard HP-UX backup utilities.

• Other utilities are available as well.

6 © 1999 Hewlett-Packard Co.

H3064S A.01

Using fbackup

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Backing up a single Directory or FileExamples

fbackup -f /dev/rmt/0m -i /home -I index.home

fbackup -f /dev/rmt/0m -i . -I index.pwd

Full and Incremental BackupsExamples

cd /var/adm/fbackupfiles

vi graph

i /

e /cdrom

fbackup -f /dev/rmt/0m -u0g graph -I index.full

fbackup -f /dev/rmt/0m -u1g graph -I index.incremental

7 © 1999 Hewlett-Packard Co.

H3064S A.01

Using frecover

Restoring Files and DirectoriesExamples

frecover -f /dev/rmt/0m -rv

frecover -f /dev/rmt/0m -i /home/user1 -xv

frecover -f /dev/rmt/0m -i /home/user2 -xv

Extracting an IndexExample

frecover -f /dev/rmt/0m -I index

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8 © 1999 Hewlett-Packard Co.

H3064S A.01

Network Backup and Recovery

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minnie mickie donald

donald# vi ~root/.rhosts mickie minnie

mickie# fbackup -f donald:/dev/rmt/0m -u0g graph -I indexminnie# fbackup -f donald:/dev/rmt/0m -u0g graph -I index

mickie# frecover -f donald:/dev/rmt/0m -rvminnie# frecover -f donald:/dev/rmt/0m -rv

tape

9 © 1999 Hewlett-Packard Co.

H3064S A.01

Being Prepared with make_recovery

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System RecoveryBoot Tape

The “System RecoveryBoot Tape” can be usedto recover from any diskfailure in vg00.

Boot LIF Area

/

/stand

/usr

vg00

60m

10 © 1999 Hewlett-Packard Co.

H3064S A.01

Creating a Recovery Tape

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Recovery TapeBoot Area

/ filesystem

vg00

List of fileson RecoveryTape

makerec.last Log File

Create a recovery tape and log file.# make_recovery -C

60m

11 © 1999 Hewlett-Packard Co.

H3064S A.01

Updating the Recovery Tape

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Boot Area

/ filesystem

vg00

List of fileson RecoveryTape

makerec.last Log File

Compare current OS files to recovery tape:# check_recovery