Western Digital March 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 I/O’s per second Read/Write ratio 70% Reads and 30% Write Error time Limit 30 Seconds Temperature 25-45C DVR SystemPC System

Video 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 Application SVR Cameras (1-16) MPEG-4 Encoder HDD(s)

Designed 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 4-16 Cameras into MPEG-2/4 encoder  4-16 Streams of SD MPEG-2 = Mbit/sec = ~10% R/W duty cycle WD Confidential

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