A Business standard-Rediff article mentions this. Following are some excerpts.

The government of India is working on a structured Business Continuity Planning model to ensure that critical services like the functioning of government websites and servers go on unhindered even when disasters — man-made or natural.

The model has been devised to recover and restore partially or completely interrupted critical function(s) within a given time period after a disaster or disruption. The government hopes to have this implemented in a year.

Thursday’s flooding of the National Informatics Centre rendered most of the Indian government websites with the domain address ‘nic.in’ — including the Prime Minister’s and President’s websites — inaccessible till about 6 pm.

However, there was no reported data loss because of there being a backup tapes mechanism and its storage area network in the NIC’s Delhi unit. …

Besides Delhi, the NIC has data centres in Pune and Hyderabad, meant to house mainly Central government data.

The department of information technology intends to set up another data centre in Bhubaneswar to serve the eastern region.

These data centres are connected by high-speed networks to support data/application back-up security.