Security & Control
Backup strategy | Data cabinets for data backup

Measures to reduce security threats Data and File protection
Backup & archiving strategies

Backup:
A "snapshot" of the database, usually at a time of minimal activity.
This may be a problem in a globally distributed database.
This is often achieved using the operating system backup utilities.
A backup is really an insurance policy against data loss.

Archiving:
Saving data "off line". (eg. Historical data).
Records may be copied to "Archive" tables, that are stored "off-line" but have the ability to be reloaded back into the system, or a separate subset of the system.
This is important to keep the size of the database managable and maintain performance.

Backup strategy.

A simple backup strategy used for backing up data where data changes occur daily is as follows;

Four week plan requiring 8 data cartridges.
The Master tapes contain your entire Hard disk, and should be stored off site.
The day tapes contain only changes or additions.
It is a good idea to clean your backup hardware regularly.
The grand master should be a new one each month.
The plan shown is used when data changes on a daily basis, determine your own requirements for a suitable plan.
Your data backup is only as reliable as the backup media. You should regularly test the integrity of the backup.

[Ref 104]Verbatim (94)

Data cabinets for data backup

Computer cabinets may be used to store duplicate copies of data on-site.
Note that burglar resistant safes DO NOT provide suitable protection for magnetic media.
Fire tests have proved that magnetic media stored in fire protection cabinets, designed only to protect paper would be destroyed in minutes.
Paper records begin to deteriorate at approximately 170°C, Microfilm at approximately 93°C, but computer software is damaged at temperatures approaching 65°C.
A fire in close vicinity to the computer suite could result in total loss of information.

[Ref 100]Chubb ( 89)

Measures to reduce security threats Data and File protection Backup & archiving strategies

Backup strategy.

Data cabinets for data backup

Measures to reduce security threats Data and File protection
Backup & archiving strategies