Hi
I suspect that is relatively simple to do if you want to make a one-time backup (such as to a set of DVDs). The problem is, you might want to update it...
Imagine you filled the first USB disk R with files including one which was 2GB (for example). Then filled S and part-filled T. So far, so good.
Next run, that file (with its backup copy on R) might be 2.5GB. How do you replace the 2GB file with a 2.5GB file if there's no room on R? Delete it from R and add it to T? Then you have the problem of preserving its relative path (now that it's 'outside' the folder structure on R...and what do you do with the 'spare space' on R after deleting the old copy? It gets very complex very quickly.
Then you have to create index files to say where a certain file is...we already do this for optical disk backups, but given that we wipe and re-copy if you re-use the same disks, we don't need to update/maintain them later. With hard disks (unless we did wipe them and start again, which wouldn't be popular...), we'd need to.
I don't think it's an area the technical director wants to go in, sorry (but I'll pass him a copy just in case).
I suspect that is relatively simple to do if you want to make a one-time backup (such as to a set of DVDs). The problem is, you might want to update it...
Imagine you filled the first USB disk R with files including one which was 2GB (for example). Then filled S and part-filled T. So far, so good.
Next run, that file (with its backup copy on R) might be 2.5GB. How do you replace the 2GB file with a 2.5GB file if there's no room on R? Delete it from R and add it to T? Then you have the problem of preserving its relative path (now that it's 'outside' the folder structure on R...and what do you do with the 'spare space' on R after deleting the old copy? It gets very complex very quickly.
Then you have to create index files to say where a certain file is...we already do this for optical disk backups, but given that we wipe and re-copy if you re-use the same disks, we don't need to update/maintain them later. With hard disks (unless we did wipe them and start again, which wouldn't be popular...), we'd need to.
I don't think it's an area the technical director wants to go in, sorry (but I'll pass him a copy just in case).