Operating Systems Lecture Notes

21 March 2012 • File-Systems Background


Outline

  • Persistence
  • Disks again.
    • Performance effects.
  • Multiplicity and RAID.
  • Latency

papertape

The Story So Far

A New Dimension Enters

The Playground

Disk Arrangement

Access Costs

Performance Requirements

Disk Connections

Exploiting The Multitude

Combining Disks

Exploiting Parallelism

An Alternative

Data Striping

Striping Advantages

Technology Advances

RAID Reliability

RAID 0 and 1

raid 1 in action

Error Detection

Error Correction

RAID 2

RAID 3

But What of Latency?

Summary

Credits


This page last modified on 2012 March 21.

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