A+ Storage

Class Notes:

Filesystems and OS

  • Max size of partitions
  • Block size and efficiency

Interfaces

  • IDE – 133 MBps – 2 drives per controller
  • SATA – 600MBps – 1 drive per controller
  • SCSI – 640MBps – 16 driver per controller
  • PCIe – 32 GBps – 1 Drive per controller
  • M.2 – 2GBps – 1 Drive per controller

RAID

  • Multiple physical drives into a single logical drive

Platter Drives

  • RPM’s
  • 5400, 7200, 10K, 15K SCSI
  • Cheap, slow, Large, physical failure issues

SSD

  • M.2
  • SATA
  • FAST
  • Cool
  • No moving parts
  • Consumable

Tape

  • VERY SLOW
  • Permanent storage

Optical

  • CD/ DVD/ Blueray
  • Not User friendly
  • Outdated

USB Drive

  • Portable
  • Slow
  • USB 1, 2, 3

Micro SD

  • Very small in size
  • Getting big

NAS and SAN

  • NAS – Network Attached Storage – Single Server
  • SAN – Storage Area Network – Multiple storage servers combined into a logical storage resource
  • Storage Protocols such as iSCSI

Cloud Storage

  • Synchronization between device cloud, and other devices

Final Thoughts

  • Storage is many times the system Bottleneck

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