Server Backup 101Server Backup 101CC Day,

Term 3, 2004

"There are two types of people. Those who

have lost data and those who will."

"There are two types of people. Those who

have lost data and those who will."

Retrospect advertisement

Server BackupServer Backup

1. Why Backup 1. Why Backup

3. Types of Backup 3. Types of Backup

4. Backup Hardware 4. Backup Hardware

5. Backup Software5. Backup Software

6. Backup Hints6. Backup Hints

2. What to Backup2. What to Backup

7. Questions 7. Questions

Why BackupWhy Backup

• Prevent data loss due to:– Hardware failures– Software failures– Deliberate User actions– User mistakes– Carbon-based problems– Pebkac, ID 10 T errors or other user related

problems,– Flood/Fire/Storm and other ‘acts of god’– Theft and Vandalism

How data diesHow data diesHardware Failure: 42%

Human Error: 30%

Software Corruption: 13%

PC Viruses: 7%

Hardware Destruction 3%

Source: http://www.backup.com/learnmore_why.html

What to BackupWhat to Backup

• All data/files which can not easily be replaced.– Student and staff data files– NDS / AD data

• There is no need to backup:– Operating System files – Application or Program files (files with the .EXE, .DLL,

or .INI extensions) – Temporary files (files with the .TMP extension) – Scan Disk Error files (files with the .CHK extension)

Types of BackupTypes of Backup

• Full Backup– Backup of all files in set.

• Incremental Backup– Backup of all files which have changed since

last backup.

• Differential Backup– Backup of all files which have changed since

last FULL backup.

Backup Hardware - OpticalBackup Hardware - Optical

+ Inexpensive, CD-RW Drives <$100

CD-R disks <50c

CD-RW discs < $2

DVD ±RW Drives <$300

DVD ±R discs < $2

DVD±RW discs < $6

+ RW media re-usable

- Small capacity- CD – 800Mb- DVD – 4.3 Gb

- Easily damaged

CD-R/CD-RW or DVD±R/DVD±R Drives

Backup Hardware - TapeBackup Hardware - Tape

+ Media re-usable

+ Large Capacity

DLT – 40/80Gb – 160/320 Gb

+ Quick

- Expensive, DLT Drives >$1700

DLT Tapes >$70(20/40)

DAT Drives > $1000

DAT Tapes > $20

(20/40 Gb)

Magnetic Tape Drives - DLT, DAT, AIT, Travan

Backup Hardware – External HDDBackup Hardware – External HDD

+ Inexpensive$ 120 for case$ 140 for 160 Gb drive$295 for 120 Gb Maxton One Touch

Including Retrospect Express Backup software – Mac + PC

+ media re-usable+ Very Large Capacity

80 Gb – 300 Gb+ Quick – 400 Mb/s+ Portable

Can be used on any computer/Server with USB/Firewire.

- Size- Vulnerable to shock

damage

- Requires USB 2 or Firewire to achieve speed

Hard disk drives in external Case with USB 2 and/or Firewire Connections

Backup Hardware – NASBackup Hardware – NAS

+ media re-usable+ Very Large Capacity

80 Gb – 500 Gb

+ Quick – 100/1000 Mb/s

+ Versatile Can be used to backup any Server/Workstation on LAN

- Expensive$ 1200 for 160 Gb drive$ 2000 for 500 Gb drive

- Cannot be taken Offsite

Network Attached Storage

Backup Hardware – CartridgeBackup Hardware – Cartridge

+ media re-usable+ Quick + Inexpensive

+ $650 for Drive+ Comes with

backup software (Mac & PC)

+ Easy to move offsite.

- Media is costly- $ 95 for 35/90 Gb

Cartridge

Iomega REV – USB2.0 or Firewire

Backup Software - WindowsBackup Software - Windows

• Backup Exec (Windows / Netware)– Free to schools– ftp://software.det.nsw.edu.au/Backup%20Exec91%20Win/

• MS Backup– Free – Part of standard install

• Backup4Win– Free - http://www.back4win.com/

NetwareNetware

• Backup Exec

• SBackup– Free– Installed by default

• Netware 6.5 supports USB Hard drives

Backup Software - MacBackup Software - Mac

• Dantz Retrospect– ~$1300

SilverKeeper http://www.lacie.com/silverkeeperFree

Backup 2.0.2http://www.apple.com/support/downloads/backup.htmlFree

Recommended Backup RoutineRecommended Backup Routine• Incremental backups during cycle• Full backup at end of cycle• Backups done after normal operating hours

– You can not backup files currently in use/opened

• E.g.– 7 Day Cycle (Friday – Thursday)– Friday – 7pm – Incremental– Monday – Wednesday – 7pm – Incremental– Thursday – 7pm – Full– No Backup on Saturday, Sunday– Media replaced each Friday Morning

Recommended Backup RoutineRecommended Backup Routine

• At least 3 backup cycles/sets– Provides history

• Media replaced annuallyannually• Backup verified regularlyregularly• Always check logs• Use task scheduler to automate backup

• Backups kept OFF SITEOFF SITE– i.e. Off school grounds.

All Backed up – no worries