Computer Architecture Lecture 6: Basics of I/O and Storage Systems Rodney Van Meter 2013/12/24

Nov 20, 2014

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Computer Architecture Lecture 6: Basics of I/O and Storage Systems Rodney Van Meter 2013/12/24 rdv@sfc.wide.ad.jp http:// www.sfc.wide.ad.jp /aqua/. Platter, Spindle, Arm, and Head. Outline. What's a Disk Drive? The Importance of a Disk Drive The Insides of a Disk Drive

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disk drive
video courtesy
consume lots
disk drive trends
slider read write head

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Computer Architecture Lecture 6: Basics of I/O and Storage Systems Rodney Van Meter 2013/12/24

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Computer Architecture Lecture 6: Basics of I/O and Storage Systems Rodney Van Meter 2013/12/24 rdv@sfc.wide.ad.jp http://www.sfc.wide.ad.jp/aqua/
Platter, Spindle, Arm, and Head
Outline What's a Disk Drive? The Importance of a Disk Drive The Insides of a Disk Drive The Access Time Gap Disk Drive Trends A Little History The Basics of a Bus Homework
What’s a Disk Drive?
What’s Important About a Disk Drive? Expensive Consume lots of power Performance bottleneck Fragile But they hold your data without power (they are nonvolatile), for a long time! Lots and lots of data!
Moore’s Law
Growth of Capacity Over Two Decades
Global Disk Shipments (in TB)
What’s a Disk Drive?
Anatomy of a Hard Drive
The Platter(s)
The Platters: 3 Disks, 6 Arms & Heads
Platter, Spindle, Arm, and Head
Arm, Slider & Read/Write Head
The Head on the Slider
Magnetic Media & R/W Head
Cyclinder, Head, Sector (CHS)
Video: Arm Moving Video courtesy of Jun Takei, Intel
Video: Arm Moving (2) Video courtesy of Jun Takei, Intel
Growth of Capacity Over Two Decades
Transfer Rate
Access Time Gap
A Little History: The RAMAC
A Little History: The RAMAC
RAMAC Delivery!
Bus Shared bandwidth Requires addressing Transactions Arbitration: priority, fairness Limitations: width, length (capacitance, 電気容量) Types: memory, peripheral Standardization
Buses: System Diagram
Buses: System Diagram