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Redundant Arrays of Independent
Memory sticks
(RAIMs)

Outlines
1. Introduction
2. Features of System.
3. System Analysis.
4. System Study.
5. System Design.
6. System Implementation.
7. System Testing.
8. Problems Occurred & Their Solution.
9. Conclusion.
RAIMs

The RAIMs (Redundant Array of Independent Memory sticks), is a
system which enables multiple smaller memory devices (sticks in
this case) to be used as one single storage unit, providing improved
performance/availability/increased storage capacity etc.
In this project multiple memory sticks insist of disks are used.
Conceptually the work is inspired from RAID technologies
specialized for disks. In this work three levels of RAID (Level 0,
Level 1 and Level 5 ) are implemented using memory sticks.
Introduction
RAIMs

1. Level 0
 Provide Performance on Read/Write Operation.
2. Level 1
 Provide Performance on Read Operation.
 Provide fault tolerance .
3. Level 5
 Provide Error Correction mechanism (Parity)
Features of System
RAIMs

System Analysis
RAIMs
 Technical Feasibility
 Economical feasibility
 Legal Feasibility
Feasibility Study

System Study
RAIMs
 RAID Technology : RAID is a method of combining several
hard disk drives into one logical unit (two or more disks
grouped together to appear as a single device to the host
system).
 USB Device: A USB flash drive also known as a USB stick, USB
thumb drive or pen drive is a plug-and-play portable storage
device.

System Design
The aim of the design is to implement the system in best possible manner
Design Goal
 Correct
 Robust
 Flexible
 Efficient
 Reliability
 Usability
RAIMs

Input
Part 1
Part 2
Merge all
Spilt Files
Output
Original Final Original Final
File File File
Spilt Module Merge Module
System Implementation
Figure 1: Level 0 (Stripping)
RAIMs

Input
File 1
File 2
Take a file
(from any
one drive)
Output
File File File
Mirror Module Retrieve Module
Figure 2: Level 1 (Mirroring)
Cont….
RAIMs

Input
Part 1
Part 2
Merge File
(according
to select)
Output
File File File
Split Module Merge Module
Parity
Figure 3: Level 2 (Parity)
Cont….
RAIMs

System Testing
Testing is a process of executing a program with the intent of finding an error
 Technology Testing
 Program Testing
 Input Testing
 Output Testing
Types of Testing
RAIMs

RAIMs
Problem1: (Speed) File read/write was too slow.
Solution: Buffer i/o stream is used instead of file i/o stream.
Problem2: (Space) Java Heap space problem.
Solution: Fixed buffered size.
Problem Occurred & Their Solution

RAIMs
 The system runs on all existing windows operating systems.
 The system supports for all type of file type including .exe.
 The system is almost error free as we handled all exceptions that
will catch every possible error.
 Deployment of system performed.
Conclusion

Department of Computer Science & Engineering
M.B.M. Engineering College
RAIMs

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RAID Technology

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