Noen utdrag fra Backup på wikipedia som oppsummerer det hele ganske bra:
Angående feil tolerante systemer vs backup (f.eks RAID):
"Backup systems differ from fault-tolerant systems in the sense that backup systems assume that a fault will cause a data loss event and fault-tolerant systems assure a fault will not."
* The more important the data is that is stored on the computer, the greater is the need for backing up this data.
* A backup is only as useful as its associated restore strategy. For critical systems and data, the restoration process must be tested.
* Storing the copy near the original is unwise, since many disasters such as fire, flood, theft, and electrical surges are likely to cause damage to the backup at the same time. In these cases, both the original and the backup medium are likely to be lost.
* Automated backup and scheduling should be considered, as manual backups can be affected by human error.
* Backups can fail for a wide variety of reasons. A verification or monitoring strategy is an important part of a successful backup plan.
* Multiple backups on different media, stored in different locations, must be used for all critical information.
* Backed up archives should be stored in open and standard formats, especially when the goal is long-term archiving. Recovery software and processes may have changed, and software may not be available to restore data saved in proprietary formats.
* System administrators and others working in the information technology field are routinely fired for not devising and maintaining backup processes suitable to their organization.
* If you already have a tape backup system, a second backup program may be necessary, do an additional backup to the external hard disk with an automatic backup program, you will have the double data security, and it is easy to check the backed up files in the external hard disk.
Angående feil tolerante systemer vs backup (f.eks RAID):
"Backup systems differ from fault-tolerant systems in the sense that backup systems assume that a fault will cause a data loss event and fault-tolerant systems assure a fault will not."
* The more important the data is that is stored on the computer, the greater is the need for backing up this data.
* A backup is only as useful as its associated restore strategy. For critical systems and data, the restoration process must be tested.
* Storing the copy near the original is unwise, since many disasters such as fire, flood, theft, and electrical surges are likely to cause damage to the backup at the same time. In these cases, both the original and the backup medium are likely to be lost.
* Automated backup and scheduling should be considered, as manual backups can be affected by human error.
* Backups can fail for a wide variety of reasons. A verification or monitoring strategy is an important part of a successful backup plan.
* Multiple backups on different media, stored in different locations, must be used for all critical information.
* Backed up archives should be stored in open and standard formats, especially when the goal is long-term archiving. Recovery software and processes may have changed, and software may not be available to restore data saved in proprietary formats.
* System administrators and others working in the information technology field are routinely fired for not devising and maintaining backup processes suitable to their organization.
* If you already have a tape backup system, a second backup program may be necessary, do an additional backup to the external hard disk with an automatic backup program, you will have the double data security, and it is easy to check the backed up files in the external hard disk.
