Procedures for Backup and Recovery Section 14

Key points and questions What data should be backed up and how often? What do we mean by full backup, incremental backup, differential backup and online backup? What media are available for storage? Who is responsible for backup?

Starter Compile a list of all the things on your computer that you would not want to lose and say why it is important to you. What would cause you to lose the files in the first place?

Activity Possible cause (example)Prevention Natural Disaster Human Error Software Corruption Virus attack Hardware Error

Media are available for storage Magnetic Tape Hard Disks Optical Disc Remote Backup service

Backup Types What do we mean by –full backup, –incremental backup, –differential backup and –online backup?

Backup types analysis Type of backupTime taken to perform backup Restore time required for backup Storage space required Hardware/Softwar e required FULLA long process as all data is backed up A very quick method of restore Large amounts of storage space Required Tape drives/DVD DIFFERENTIALMore than incremental but can be quicker than a full backup Less than incremental but takes longer than a full backup Less storage space than a full backup but more than an Incremental Tape Drives/ DVD/CD-ROM INCREMENTALThe least time taken of the three methods The slowest restore speed of the three methods Storage space is the lowest of the three methods. Tape drives/ DVD/CD-ROM

Causes of Lost Data: