๐พ Backup Methods
- Onsite
- Offsite
- Cloud
Onsiteโ
- Complete and stored at the same site as the primary data source
- Backup media will include magnetic tape, external hard drives, servers, NAS
Advantagesโ
- Immediate access to data
- One time cost
- Internet access not needed
Disadvantagesโ
- Fire/theft - This option cannot help
- Hardware failure will loose all data
Offsiteโ
This is a copy of the businesses production system. Data that is stored in a geographically different location than the production system.
Advantagesโ
- Protection against disaster at business premisies
- Protection against primary site cyberattcks
Disadvantagesโ
- Slow recovery time
- Cost / management
Cloud backupsโ
Data is backed up in the cloud. It uses virtualisation
Advantagesโ
- Cost effective, no site management
- Easy to scale
Disadvantagesโ
- Slow recovery time
- Internet conenction dependent
3-2-1โ
Always have 3 copies of you data (your production data and two backup copies)
Have the backups on two different media (disk and tape)
With one copy offsite, for disaster recovery
Methodologiesโ
Fullโ
Makes a copy of all data to another set of media.
Advantagesโ
- All data is backed up
- Straightforward to restore
Disadvantagesโ
- Time consuming
- Storage space
Incrementalโ
Only copies data that has changed since the last backup of any time
Advantagesโ
- Less sorage required than differential backup
- Quicker to backup
Disadvantagesโ
- More time to restore as all previous backups have to be restored
Differentialโ
Only copies data that has changed since the last full backup.
Advantagesโ
- Less storage required than full backup
- Quicker to restore than full backup
Disadvantagesโ
- Stores more data than an incremental backup
- More space required than incrememntal backup