Back-ups

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Hi,
I've been studying the different forms of back-up, but don't seem to get my hear around this. I know there are 5 types: normal (full), differential, copy, incremental and daily.
Could someone post a neat summary (that goes beyond Meyers), or tips/tricks on this topic?

Cheers.

 

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Not sure if this will be of any help

Full Backup - http://www.backup4all.com/kb/full-backup-116.html
Differential Backup - http://www.backup4all.com/kb/differential-backup-117.html
Incremental Backup - http://www.backup4all.com/kb/incremental-backup-118.html

 

So what is the difference between a modified and a changed file then?

In order to change a file would it not be modified?

In order for a modified file to be considered changed there would have to be a change applied somewhere or it would be the same and not modified.

This gets me too. Very confusing. I get the principal of a full back up where it backs up all.

To me the only difference i can see are the two words of modified and change unless i cannot get my head around the subject at all and am focusing on something i should not be.

I read those pages above and it still does not help me much as i seem to be hanging on those two words.

Edit...just noticed that the two have different pre-requisites.

 

If you are backing up a folder, the contents of that folder may have changed, for example some new files that were not there before may have been added.

Also, some files that were there before may have been edited, such as a word document, may have a new paragraph added. This is an example of 'modified' as the file already existed.

 

Ok, maybe it was the material i was using that messed with my head.

Please tell me if this is right then


All files that are changed get the a bit on to show it has been changed.

Full - all files are backed up. bit reset to off

Incremental - all files changed since last FULL or INCREMENTAL get backed up. Bit off but need FULL to restore as well

DIFFERENTIAL - all files changed since last FULL. Bit stays on but need FULL and all DIFFERENTIAL to restore

i think this is as far as i got now

 

Nearly....

When it comes to restores you need the following:

From Full: Just the Full backup

From Full + Incrementals: Need the Full and ALL incrementals up to the last incremental you want to restore to

From Full + Differentials: Need the Full and the LATEST differential as it has everything that has changed since the Full.

 

Thank you.

OK. Run the full backup and then ALL incremental backups in order adn with differential i just use the latest one and forget about all the ones before that then.

I got it now.

I think it was mikes book. I could not get my head around it for some reason and all the explanations on the net just made it even more confusing. There is no need to write a book like some have done on the net about it when the concept is fairly simple AFTER you understand it. Sometimes i need to listen instead of reading how it is done.

Bit nervous now...test on tuesday and wed 600 series

Thank you very much people. I really appreciate it

 

Well GL with it

There are always a few errors dotted around in the books, the Network+ Passport from Meyers has a glaring issue in one table where apparently multi-mode fibre can go up to 40km's - good example of using multiple sources.

Backup theory is relatively easy now you've got your head around it, finding a good backup program is a lot harder, and getting users to swap media when they should is another story entirely.