- options to build a storage subsystem providing 48TB of storagecapacity using two options. Option 1 can be built using 500GBdrives (small disks), while option 2 can be built using 2TB (largedisks). In both cases, disks fit in enclosures that contain a powersupply and I/O interconnections to a node that providesCPU/memory/controller functions to manage the disks and theinteraction with a host computer.
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Note that 1 enclosure assembly can support 8 large disks or 12small disks and that from a reliability standpoint the enclosuresare not connected in series or parallel. Further assume thatcomponent lifetimes are exponentially distributed, and that anyfailure events are independent
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