Cloud Storage : Block Storage Technologies - 8

a CCNA Cloud CLDFND 210-451 summary

  1. Tape libraries are considered tertiary storage, they can store exabytes (EB) of data.

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  2. Data addressing in HDDs, cylinder/head/sector

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  3. RAID level description, i.e Redundant array of inexpensive disks.

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    • Parity bit are calculations of data in two drives and storing the results on third drive.
    • Nested were introduced to leverage RAID 0 and RAID 1 (redundancy and performance) without the need for parity calculation. image.png
  4. Array Components are SATA, controller, disk enclosure and access ports.

  5. Following devices can potentially deploy volume thin provisioning, Storage array, Server, Dedicated network appliance.

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  6. Block I/O access methods ATA(Advanced Technology Attachment), SCSI (Small Computer System Interface), SAN

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  7. Fiber optical access,

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TypeDescription
FC-0Physical components
FC-1Performs encoding and error control
FC-2Frame structure and byte sequences
FC-3Generic services
FC-4ULP(upper-layer protocol) mapping
  1. Fibre Channel addressing, FSPF (Fabric Shortest Path First) is used to exchange routes based on domain IDs.

  2. Common SAN topologies,

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  3. Advantages for deployment of VSANs,

    • Interoperability
    • Multi-tenancy
    • Security
    • Isolation
  4. iSCSI does not employ TCP connections to encapsulate Fibre Channel frames.

  5. Most popular block I/O access method for cloud offerings of Storage as a Service, iSCSI