Prelim 2 ReviewAri RabkinDisksRequest orderingRAID:Striping, mirroring, ECC, byte striping+parity, block striped parity, interleaved parity blocks, extra parity disk...0+1 is mirrored stripes, 1+0 is stripe of mirrorsFilesNeed FS to manage storage in device-independent way.Can be networked, distributed, in-RAM, etc; not just on disks.But mostly optimized for disks.Know Unix FS (inodes, superblock, directories)NetworksLink layer (ethernet)Network layer (IP)Transport Layer (TCP)Security“Gold standard” is Authentication, Authorization, and Audit.Authenticate with what you know/have/are.Auth. matrix: ACLs versus Capabilities (Pay attention to policy vs mechanism)Threats: Buffer overflows, worms/viruses, DOSDist. SysDNS (root servers, TTLs, hierarchy...)RPCs (failure modes?
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