1 Day
Code: CSL1010
Duration: 1 Day
Pre-requisites: Entry level - No previous experience necessary
The training is intended for delegates with an interest in the construction, functionality, technology and data structures employed in magnetic storage systems. The course is designed as an introduction to the design, function operation and failure of HDDs. This serves as a comprehensive precursor to any HDD Data Recovery training courses.
Learning Objectives:
- To provide an understanding of magnetic recording and encoding methods and techniques, magnetic read write heads and head positioning systems;
- To examine the internal physical structure and components of HDDs;
- To explain different types of HDD form factors together with the various interface types and their characteristics;
- To consider the role of firmware in HDD operation and the importance of critical firmware modules;
- To explore in detail the logical architecture of HDDs at a system level;
- To introduce various file systems, their characteristics and relative merits;
Course Content:
The Physical Components of HDDs
- The Platter Platter construction and materials, substrate material considerations, magnetic media & deposition, lubricating and protective layers
- The Read/Write Heads Head and Actuator components, slider role and construction, head flying height and height considerations, head crashes, head parking, GMR principles, Longitudinal and Perpendicular recording, Data recording density
- Spindle Motors Platter rotation speeds, bearing construction, voice coil motor principles
- PCB PCB Role, major components, CPU, firmware, cache, motor controllers
- Interfaces and external connections Basic principles, ATA/IDE (PATA), SATA, SCSI and jumper configurations
- Other Components Chassis, Filters, O-Rings, Seals, Breather holes etc.
Hard Drive Form Factors
- 3.5 Inch Desktop
- 2.5 Inch Laptop/Notebook
- Dimensions
- Attributes
Other Data Storage Devices
- Micro-drives
- USB Flash Drives
- Memory Cards
- Solid State Drives
- Hybrid Drives
Management of Stored Data
- Physical arrangement Tracks, sectors, cylinders, CHS and LBA addressing, translation algorithms, capacity calculations
- Overheads Head positioning, servo information, Error Detection & Correction
- Cache principles Read, write and prefetch, FIFO, wrap-around
Logical HDD Architecture
- Low & High level formatting Bad sectors, P & G Lists, Spare Sectors
- Partitioning Single and Multiple, primary, active, extended, Master Partition Tables
- Int 13H Format
- Volume Boot Sectors
- Master Boot Record
- File Systems FAT, Clusters, directory entries, File Allocation Table, FAT limitations, VFAT, long Filenames, cluster chaining, FAT 12, 16 & 32, comparisons. NTFS, HFS
HDD Faults and Symptoms
- Logical faults Corruptions, deletions, formatting, virus attack, symptoms
- Electronic & Electrical Failures Component failure, burn-out, spikes and surge damage, interface damage, symptoms
- Physical faults Head failures, head crashes, spindle seizure, symptoms
- Firmware Failure Firmware principles, modules, Service Areas, symptoms
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