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Western Digital

Western Digital. March 2010. CE CY2010 Roadmap. 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

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Western Digital

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  1. Western Digital March 2010

  2. CE CY2010 Roadmap Page 2

  3. 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 CE vs. PC DVR System PC System 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 WD Confidential

  4. Video Resolution Impact on Storage HD resolution in MPEG-4 ~4 GB/Hour = ~9.1 Mbit/sec SD resolution in MPEG-2/4 ~1 GB/Hour = ~2.28 Mbit/sec WD Confidential

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

  6. 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 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 = 9.1-36.4 Mbit/sec = ~10% R/W duty cycle WD Confidential

  7. 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

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