A method for execution by one or more processing modules of a distributed storage network includes encoding a data segment of data using a dispersed storage error coding function to produce a write threshold number of encoded data slices and identifying primary storage units available for storing the write threshold number of encoded data slices. The method further includes issuing a write slice request that includes a slice name and an encoded data slice corresponding to each of the available primary storage units. For those primary storage units that are unavailable the method continues by selecting a storage approach for storing an encoded data slice and selecting a foster storage unit. The method continues by issuing a write imposter slice request to each selected foster storage unit, where the imposter encoded data slice includes an information dispersal algorithm (IDA) index corresponding to the associated unavailable storage unit.