StorageCraft is a world leader in backup software. The main tools are ShadowProtect SPX and ImageManager. These tools combined come together to give you flexibility and peace of mind.
The way ShadowProtect works is that it takes a full copy of your server as it stands right at the start of your backups. From this point on all ShadowProtect needs to back up are the changes that are to made. This process is the magic behind ShadowProtect’s quick backups. So quick in fact, that ShadowProtect can make several backups throughout the day with minimal performance impact.
Now you have one full backup and many hourly backups. At this point, ImageManager steps in and helps out. ImageManager will do two procedures for us. One is to check that the backup created by ShadowProtect is usable. Secondly, ImageManager takes the hourly backups and combines them into one daily file. As backups continue, ImageManager will combine backups into weekly and monthly backups. This procedure of rolling up hourly into daily backups will save you a little space. What’s important here is that ShadowProtect continuously keeps a record of what has changed since the backup started.
Eventually, the drive that holds ShadowProtect’s backup files will fill up. What then? No one would be at fault for thinking that all we need to do is delete the older backups. Problem is we can’t. Take a look at the drawing below. Like Big Ben, your Backups have a foundation that all other backups rely on. What can we do then?
If cost is an issue and being able to restore a file from yesterday or last week is not a requirement, we have the option of deleting the current backups and starting the backups all over again.
We have the option to buy another drive that is the same size or close to the same size as your current Backup drive. You will then be able to take your current Backup drive and put it somewhere safe. Then a new backup is started on the new drive. From now on you can just swap drives when you run out.
We could also buy a drive that is bigger than the current backup drive. We can then move the current backups onto the new drive and carry on backing up. The downside is that eventually, the cost of bigger drives could get too expensive. Secondly, would you need to restore a file from four years ago? Here is an example of where this option works well. You have a 500Gb or 2TB drive. Your Backups contain no more than two years history. In this case, you could purchase a 4TB drive and keep your current backups.