mountable solid state storage subsystem includes a plurality of interface units and a plurality of data storage modules to implement a mass storage device each of the interface units may be coupled to a plurality of communication ports for connection to a host server and to other interface units each data storage module may be detachably mated to a corresponding connector mounted to a motherboard each data storage module may also include a non volatile flash memory storage and a volatile storage the data storage modules may be partitioned into a plurality of portions each coupled to a respective interface unit via the motherboard each portion of the data storage modules and the respective interface unit to which each portion is coupled may form a separate storage domain that is isolated from each other domain the storage subsystem may also include redundant power supplies and backup power supplies application_number US 24964808 A description turning now to fig1 a block diagram of one embodiment of a storage server system including a high density solid state storage subsystem is shown the storage system 10 includes a host 12 a coupled to a storage subsystem 15 via a communication link 13 a in addition host 12 n is also coupled to the storage subsystem 15 via communication link 13 n where u2018 n u2019 may be any number it is noted that components including a reference designator having a number and a letter may be referred to by the number only where appropriate for example when referring generally to any host unit the host unit may simply be referred to as host 12 in the illustrated embodiment the storage subsystem 15 includes a high density solid state storage unit 16 designated.