I'm working on a proposal for work that might go ahead this summer and as part of it I am looking at our storage and backup needs.
Basically, we currently have about 1.2TB of data, of which half is important and backed up daily/incrementally. The other half is more 'archive' and therefore backed up monthly, with incrementals weekly.
We're wanting to move to a properly virtualised system, and as such we want a central storage device of some form. However, there are so many different types, etc... it is making my head spin.
Also, we need to sort out a backup solution. At the moment we have a DTD system and it is not as robust as I'd like. Firstly, BackupExec 11d is terrible in my experience - catalogues messing up etc and causing issues.
So, I'd like suggestions in this arena too. We have multple buildings, so a DTD system is fine from a data recovery point of view. Also, am I right in thinking that we should go with SAS for the main storage, and then a SATA device for the backup?
I'm thinking that I should spec for the data to double within our 4-5 year period of life. So, the main storage device needs, rounding up, 3TB for storage of data and then we would have around 15 VMs running, which I'd give around 100GB per server. So, a further 2TB (again rounding up). So total of around 5TB.
What should we be looking at for backup?