The paired disks are in a different physical location so they also provide a degree of geographic redundancy.
Short of splitting a RAID array across two physical locations (a terrible idea), your proposal would require them to run mirrored RAID arrays in both locations.
This would give them greater redundancy, but would be a less efficient use of raw disk space than their current solution. It would also be more complex and difficult to maintain, and have performance impacts.
Short of splitting a RAID array across two physical locations (a terrible idea), your proposal would require them to run mirrored RAID arrays in both locations.
This would give them greater redundancy, but would be a less efficient use of raw disk space than their current solution. It would also be more complex and difficult to maintain, and have performance impacts.