Hydra: A Block-Mapped Parallel Flash Memory Solid-State Disk Architecture
Alwin James
Roll No : 2K7704
Dept. of Computer Science and Engineering
November 28, 2010

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1 Introduction
2 Hydra: Disk Architecture
Background
Architecture
Description
3 Comparison
4 References
5 Questions

Hard Disk Drive (HDD)
 Rotating rigid platters on a motor-driven spindle within a
protective enclosure

Block Level Mapping
Logical sector address is
divided into logical block
address and sector address

Comparison Between HDD and
SSD
Solid State Drives(SSD)
1 Access Time: 0.1ms
2 Low Read Latency Time
3 Less Power Consumption
4 Resistable to
shock,extreme
temperatures and
magnetic interference
Hard Disk Drives(HDD)
1 Access Time: 0.5-10ms
2 High Read Latency Time
3 High Power Consumption
of upto 15+ Watts
4 Susceptability to shock,
extreme temperatures and
magnetic inteference