RDX drives vs. USB HDD Drives for Backup
Posted on 2012-03-21
This is Part 1 of a multi-part question regarding backup technology. I have an SBS 2003 server that is backed up in the following way:
1) Exchange (roughly 30GB) backed up daily using NTbackup to Dell RD1000 (RDX) drives
2) System and Work Files (roughly 100GB) backed up using Symantec BackupExec to Dell RD1000 drives. Every Monday run a full backup, then run Incremental backups Tuesday thru Saturday.
3) Work files (roughly 80GB) are also backed up to a USB HDD drive daily using RoboCopy
4) Multimedia Files (roughly 500GB) are backed up to USB HDD drive weekly
I have 4 Dell RD1000 drives (three 160GB and one 320GB) that I rotate on a weekly basis with one drive stored offsite.
My 160GB RD1000 drives are all being used near capacity. I also plan to upgrade my server to SBS 2011. This means I either need to purchase 3 or 4 larger RDX drives at a cost of roughly $250 each, or change technologies.
In terms of archiving, we are a small company and do not pull older data off the server. Our server has two partitions - one for current projects and one for older. Both partitions are online and backed up per the above plan.
From what I have read, USB HDD drives have a few advantages over RDX drives.
1. They are about half the price (a 1 TB USB 3.0 HDD drive sells for $125 or so at Costco while a 1 TB RDX drive from Imation or Quantum is about $250.
2. The USB drives are physically smaller and easier to store - although this is not a big deal.
3. My current RD1000 drive is USB 2.0 while the HDD is 3.0. Granted, my current server does not have a USB 3.0 port. The new server will so if I stick with RDX I will need to buy a new external RDX drive that supports 3.0 (another $200 or so).
Here are my questions:
1. Are RDX drives more reliable than USB drives?
2. Are RDX drives faster (do they spin at a faster rate)?
3. Since I re-write the data to the drives once every 4-6 weeks, are the two technologies comparable in terms of data stability? I have read that disks make poor archiving solutions if the disks are stored for extended periods. Does this apply to my situation?
4. Does SBS 2011 treat RDX and USB HDD drives the same? I have read that removable drives do not offer the same backup options as tape drives do.
5. Which technology, if any, can be used with Acronis True Image Echo Server for bare metal restore?
Thanks so much for your help.
*** Note in my original post I had an error stating that I use REV drives (from Iomega) as opposed to Dell RD1000 drives (RDX technology). Sorry.