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Kudos0

How do I restore from an incremental backup set?

I need to restore files from a backup set.  It's my understanding that Ghost 15 does incremental backups, and that seems to be confirmed by the fact that all the backups after the initial (full) backup are different sizes.  (If they were differentials, I would expect the subsequent backups to be increasing in size.)  To restore, I think that I should restore from the initial backup, and then restore from each of the subsequent (incremental) backups in date/time order.  However, when I spot-check the existence of files in each backup (using the Recovery Point Browser), I see the same files that have not changed since the initial backup in each of the incremental backups.  Does that mean that the last incremental backup somehow "picks up" the files from the previous backups?  

For example, files dated 7/21/12 appear in the initial backup made on 5/10/17.  The same files, with the same date, appear in each of the incrementals.  So the question is,

Do I really need to restore from each incremental, or can I just restore the initial backup and the last incremental (as I would if these were differential backups)?

Replies

Kudos0

Re: How do I restore from an incremental backup set?

Hi a440guy,

Just pick the backup that has the file(s) you need. Ignore the fact that it is a base (v2i) or incremental (iv2i) backup. Ghost takes care of that. Do realize that each incremental backup (iv2i) relies on the one before it and the base (v2i). Keep all files together and you are golden. Delete or move some of them and you no longer have incrementals that will work. You will know right away if a backup file is missing from the chain because it will not open in Recovery Point Browser.

Kudos0

Re: How do I restore from an incremental backup set?

I want all the files.  I don't necessarily know all of their names so I can't just pick the files that I need.  So, I'm pretty sure that I need to restore everything in the base backup.  But then, do I need to restore everything in each incremental backup or just the last incremental?

Kudos0

Re: How do I restore from an incremental backup set?

If all of the files you need are in the last incremental, use that one. You only have to restore a file once. The date that your backup was run is a snapshot of your harddrive / SSD at that time. You are overthinking this.

Example:

A base backup is run on the first of the month with incrementals every day. On the 3rd of the month, you create and save a file. On the 15th, you edit and save the same file. On the 20th, you delete this file. Depending on which backup you open will depend on if the file is in it and which version. If you open the backup that was made on the 17th, it will have the second version of the file. If you open the backup from the 7th, it will have the 1st version. If you open the backup from the 25th, it will not be there because it was deleted on the 20th.

Kudos0

Re: How do I restore from an incremental backup set?

redk9258,

I appreciate your efforts, but I don't think you understand what I want.  You keep referring to "the files that I need."  As I said, I don't know the names of the files that I need.  I want (almost) all of them. 

Here is what is going on:  My hard disk was re-formatted and the operating system was re-installed.  I've run Windows update to update the OS and Microsoft products.  I've re-installed all the applications that I need.  Now I want to restore all the so-called data files.  For example, I want to restore the entire Documents directory, the files contained therein, and its subdirectories and the files in them.  I don't want to restore the entire partition because that would restore the OS and a lot of other crap that I don't want. So, I start by restoring the Documents directory from the base backup. 

Now, if these were truly incremental backups, each incremental backup would contain only the files that had changed since the last backup (base or incremental).  But, these are not truly incrementals as proven by the fact that a file which has not changed since the base backup is in EACH of the incremental backups.  So, in order to get the lastest version of each file under the Documents directory do I have to restore the Documents directory, from each incremental in which it exists, in order (which is what one would do if these were real incrementals), or do I just restore from the base and the last incremental?

Accepted Solution
Kudos0

Re: How do I restore from an incremental backup set?

They truly are incrementals.  When your "viewing" an incremental, your able to see files that have not changed because Ghost is "assembling" the base image and all the incrementals up to that point.  Your "seeing" the complete system image(s) up to that point.

So as Red suggested, you only need to restore one incremental, Ghost puts everything together up to that point and does a complete system restore.

Dave

Kudos0

Re: How do I restore from an incremental backup set?

OK, that explains it.  These " incrementals" contain some kind of pointer to the files in an earlier backup so that each incremental appears to contain all the files that existed at the time the incremental was made.  It also explains why Ghost takes so long to make an incremental backup -- it has to compare the entire filesystem to the files in the previous backup and determine if it has to copy the file into the backup or insert (or omit) a "pointer."  This makes it very easy to restore as one has only to restore from the most recent backup, instead of restoring each and every incremental.  It explains why all the files appear to be in an incremental even though the size of the incremental backup file is very small. 

Thanks both of you, Dave and Red.

- Mark

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