The actual question is – how quickly do you need to restore your data?
This is because the necessary systems to restore your data will change depending on how long you can afford to be with out it. If your company data is mission-critical then restoring this becomes highest priority.
This forms the basis of your Disaster Recovery Plan.
To give you some perspective, most companies use backup tapes as a means of backing up their data, with a nightly, weekly and monthly rotation policy. This is commonplace and good-practice. However – have you ever actually had to restore a company from a backup device? Restoring one set of backups can take from 4 hours after the restore has been initiated – on the matched hardware that created the backup, on the actual servers that run the software.
Now, what if the backup fails?
What if the servers are damaged or the install disks for a legacy piece of software that your business relies on are scratched?
In most cases, this is not the case. And in almost all cases a restore is possible – but it’s the time that is the most important variable. As you can imagine the less time required, the more expensive the restore solution would be, so your Disaster Recovery Plan will ask questions about your business where the answer can only be determined after considering the potential costs related with the worst possible outcome.