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Re: How to use dmsetuup?



On 11/5/23 12:46, debian-user@howorth.org.uk wrote:
David Christensen <dpchrist@holgerdanske.com> wrote:
On 11/5/23 01:04, Thomas Schmitt wrote:

Lesson learnt: Never overwrite the two youngest backups.

I try to use the term "backup" to mean a data copying process whereby
older data is overwritten by newer data.

I try to use the term "archive' to mean a data copying process
whereby the copy is never modified or erased.

You're entitled to do that I suppose, but I don't suppose most other
people do. They separate the words by their meanings and purpose.
Backups are intended for use recovering information that has become
lost. Archives are places to keep information for long term storage.

So your definition of archive is correct. But your definition of backup
isn't. It's perfectly reasonable to have more than one version or age
of backup, but it's also perfectly reasonable to erase them at some
chosen age or version.

It is perfectly reasonable to discuss 'the two youngest backups', IMHO.


English is ambiguous. "Backup" and "archive" can both be used as nouns and/or verbs, depending upon context. This makes communication hard, especially for non-native speakers.


I agree that the primary purpose of backup (verb when performed, noun for the media containing one copy of the data) is for recovery (verb when performed, noun for the result).


I agree that a backup (singular noun for the media) can be archived (verb), thereby becoming an archive (singular noun for the media) in an archive (collective noun for all the media and singular noun for a place).


The differentiating factor is whether or not the media containing the copy is intended for ongoing re-use. I re-use my backup RAID's and HDD's. I cannot re-use my archive DVD-R's.


David


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