July 23, 20232 yr I wanted to write up an article on "Backup Strategy". As I state below, when you talk about "backups" you should really be talking about a backup strategy and "copying files" or "using parity" is only a part of that strategy. This is a work in progress and I welcome suggestions, critiques, and comments. Definition A person or thing that can be called on if necessary; a reserve. Computing: the procedure for making extra copies of data in case the original is lost or damaged. Why is data backed up? A backup is created to protect the original by duplicating it so a backup strategy should involve protection so as to avoid the need of creating, maintaining, and having a backup in the first place. How can files be lost or damaged? They can be lost by being stolen digitally (hacked or ransomware) or physically (computer or hard drive burgled). They can also be lost due to negligence (accidental deletion) or on purpose (virus or ransomware). They can be damaged by time (bit rot), deficient hardware (drive failure), or by physical means (fire or other “act of God” event). Backup Strategy When people talk about “backup” they mean a backup strategy. Copying your files to another location is the most simple form of backup but it’s really a part of an overall strategy. There are two main parts of a backup strategy and these are further split up into other areas. Protection Encryption Access Quality Hardware Location (Offsite/Lockdown) Redundancy RAID/Mirror/Parity Copies/Snapshots/Archive Prevention and Recovery As you develop your strategy it evolves into a more effective method of prevention and more consideration is put into the ease of recovery.
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