Most Service Providers utilize cheap host-based RAID arrays with onboard disks, a single hardware RAID controller, or in some cases even software RAID (!). These setups provides a certain degree of fault-tolerance in that a single disk in the array may fail transparently, but they do not protect against downtime resulting from the failure of the host in which the array is contained, the failure of the RAID controller, or, usually, the failure of multiple disks. Most service providers, therefore, have multiple single points of failure in their storage setups, unlike e-Sensibility's SAN-based solution.

e-Sensibility stores all production data on a fully redundant iSCSI SAN, which is accessed via a dedicated IP network. The Production SAN has multiple power supplies, multiple RAID controllers running in a clustered configuration, and multiple bonded NIC's for fault-tolerance and performance. Additionally, every host storing to the SAN maintains a multipathed connection. e-Sensibility stores backups on a second iSCSI SAN, ensuring that your data, even in the event of catastrophic hardware failure, is still intact and accessible.