Western DigitalWestern Digital

March 2010March 2010

Page 2

CE CY2010 Roadmap

WD Confidential 3

CE vs. PC

Interface Speed

PIO 4, UDMA 33 or 66

Power On Hours

24 hours / 7 days

Writes/Read per day

100GB W/ 15GB read (Dual tuner-SD)

Transfer Type

Random/ping pong across whole disk

Transfer length per command

10%= 1 to 20 blocks

90% = 256 to 4K blocks

Seek Activity

>5-30 I/O per second

Read/Write ratio

Write75% and Read 25%

Error time limit

Less than 250ms-1s

Temperature

45-70C

Interface speed

UDMA 100 or higher

Power On Hours

2-10 hours per day

Writes/read per day

1GB write / 2 GB read

Transfer Type

random with very narrow seek Profile

Transfer per command

>80% = 1 to 256 blocks

<20% = 240 to 256 blocks

Seek Activity

20-30 I/O’s per second

Read/Write ratio

70% Reads and 30% Write

Error time Limit

30 Seconds

Temperature

25-45C

DVR System PC System

Video Resolution Impact on StorageVideo Resolution Impact on Storage

SD resolution in MPEG-2/4~1 GB/Hour = ~2.28 Mbit/sec

HD resolution in MPEG-4~4 GB/Hour = ~9.1 Mbit/sec

WD Confidential

Surveillance Video ApplicationSurveillance Video Application

SVR

Cameras (1-16)

MPEG-4Encoder

HDD(s)

Designed for Security VideoDesigned for Security Video

3 Streams of SD MPEG-2 = 6.8 Mbit/sec or 3 Streams of HD MPEG-4 = 27.3 Mbit/sec = <10% R/W duty cycle

3 Streams of SD MPEG-2 = 6.8 Mbit/sec or 3 Streams of HD MPEG-4 = 27.3 Mbit/sec = <10% R/W duty cycle

4-16 Cameras into MPEG-2/4 encoder4-16 Streams of SD MPEG-2 = 9.1-36.4 Mbit/sec = ~10% R/W duty cycle

WD Confidential

Why use WD AV drives? Why use WD AV drives?

Proven best in class reliability Ramp load WarrantyWeek.com

Exceptionally cool WD GP drive has only a 7 Degree ambient to base casting temperature

delta Competitor 1 1TB drive runs 13 degrees hotter than WD GP Competitor 2 1TB drives runs 9 Degrees hotter than WD GP

– Source = Tom’s Hardware

Exceptionally low power Intelli-seek

Exceptionally quiet