The San deployment is part of a £45m investment in new interactive channels, which include the internet, interactive television and SMS on mobile phones.
The deployment will boost Camelot's disaster recovery and data protection provision.
Rick Harrington, interactive architecture and security manager at Camelot, said the San, from McData, will work with Camelot's IBM AIX-based systems, with applications running on Websphere servers and using DB2 databases.
"High performance and availability are critical to our commitment to extend accessibility to the National Lottery," said Harrington. The McData storage product was chosen because it was reliable, simple and offered an upgrade path to blade servers, he added.
The San will allow Camelot to use large volumes of data from online transactions for marketing purposes.