Hybrid-Disk Drive Technology Seminar (3 Days)


Shrader126x152$1,595-
Now that perpendicular has become the standard new production technology, we at KnowledgeTek will focus on perpendicular information but will still include a discussion of longitudinal,as the majority of product in the field still uses that technology and it is instructive for our students to understand the issues that precipitated this fundamental change.

The Hybrid-Disk Drive (HDDT Training) Training Seminar provides an in-depth look into the technology of disk drives and how they are designed, manufactured, and used. Much more than an overview, the course teaches the issues and tradeoffs involved in increasing the capacity and performance, while lowering the cost, of today’s rapidly evolving drives. The course discusses the latest state-of-the-art disk drive engineering techniques – including the recording process, perpendicular recording, heads and media, read/write channels, servo systems, and back-end test process including the types of tests run, the purpose of those tests and how those tests are structured. In addition, we will discuss new technologies that are either implemented or will be implemented in the near future with emphasis on how these technologies enable advances in performance and/or recording densities. The course material is drawn from textbooks, industry specifications, and extensive practical experience, and provides valuable details and information unavailable elsewhere. If you need a better understanding of the technology behind this exciting industry, this course is the place to get it.

In this class we will look at the performance of flash memory, compare it to hard drives and see how it is being utilized in hard drives (hybrid drive). Flash performance (SSDs) will be compared with hard drive performance and the issues that affect that performance discussed. We will cover the structure of flash memory and how basic functions like read, write and erase are performed and how data moves in and out of the flash memory. We will also cover the physical characteristics of this type of memory and how improvement in terms of capacity/cost as well as performance and reliability will be achieved in the future. In summary, hybrid drives offer the potential for significant improvement in system performance. The amount of improvement achieved is dependent on how well the operating system takes advantage of these capabilities and the type of data that is being processed. We will explore those issues as well as issues that impact reliability.

DISK DRIVE BASICS
Mass Storage Architectures
Market segment requirements
Role of Flash
Hybrid Drive architecture
Storing Data Magnetically
Areal Density
Zoning and Data Rate
Components of a Disk Drive

MAGNETIC RECORDING
Magnetic Materials and Properties
Perpendicular and Longitudinal
The Write Process
The Read Process
Transition Length & PW50
What Limits Density

HEADS AND MEDIA
GMR Heads
TMR heads
Impact of high TPI/BPI on head and media design
Media Noise

RECORDING CHANNEL
Write Signals
Head Interface (Preamp)
PRML
Data Synchronization
Noise, ISI and pulse shaping

DRIVE INTERFACE BASICS
IDE/ATA Overview
SCSI Overview
Serial Interfaces
Serial ATA
Serial Attached SCSI

MANUFACTURING AND TESTING
Head/Media Mfg
HGA and HDA Assembly
Production Testing and Drive
Configuration
read channel adaption
heater calibration
write current selection
read sensing current selection
micro-jog calibration
Environmental Production Testing
defect scan
BER testing
seek testing
data handling
Issues (RVI, FIV)

NEW TECHNOLOGIES
Dual Stage Actuators
Thermal Stability
DTR
BPMR
HAMR
Shingled writing

DISK DRIVE CODES
Recording Codes ­ RLL
8b/10b encoding
Error Correction Codes ­ ECC
ECC-on-the-Fly
CRC
Scrambling
Parity Assist

DATA ORGANIZATION
Sector Formats
Split Data Fields
Logical to Physical Mapping
Defect Management

CONTROLLER FUNCTIONS
Sequencer
Buffer Management
Data Flow
Example Command

SERVO SYSTEMS
Position Transducer
Servo Fields
Servo Writer
Seeking
Average Access Time