Each SRP module contains a flash card that stores system files. On the E120 router and the E320 router, each SRP module can have an additional flash card; the second card is reserved for the storage of core dumps.
In this documentation, the flash card on the primary SRP module is referred to as the primary flash card; the flash card on the redundant SRP module is referred to as the redundant flash card.
If you have two SRP modules installed in a router, you can use flash cards of different capacities on the SRP modules. The effective capacity of the higher-capacity flash card equals that of the lower-capacity flash card.