Seagate ST3500320SV Beat the Heat: Designing SDVR Systems for Optimal Thermal
Seagate ST3500320SV - SV35.3 Series - Hard Drive Manual
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- Seagate ST3500320SV | Beat the Heat: Designing SDVR Systems for Optimal Thermal - Page 1
has proven challenging for some, particularly in terms of the hard disc drive (HDD). This is primarily due to the harsh environmental and so critical to disc drive reliability, it's useful to briefly review the fundamentals of drive operation. Disc Drive Basics HDD storage relies on magnetism - Seagate ST3500320SV | Beat the Heat: Designing SDVR Systems for Optimal Thermal - Page 2
, compromised data integrity and greater risk of drive failure. Calculating Your HDD's Thermal Environment When determining the thermal environment of PROPERTIES OF CHASSIS MATERIAL USED: Metals such as aluminum and steel are relatively efficient thermal conductors, enabling them to transfer heat - Seagate ST3500320SV | Beat the Heat: Designing SDVR Systems for Optimal Thermal - Page 3
is also promoted. The growing availability of high-capacity (250, 400 and 500GB), purpose-built SDVR HDDs enables systems to deliver enormous capacity with a minimal number of drives. These new drives also incorporate sophisticated power management features (see below) to enable even greater system - Seagate ST3500320SV | Beat the Heat: Designing SDVR Systems for Optimal Thermal - Page 4
HDD's read/write strategies to the type of data being used. Purpose-built SDVR drives support the ATA-7 command set, enabling the drive Thermal Best Practices (aluminum, steel) better thermal hard drive capacity. Accessible capacity may vary depending on operating environment and formatting. Seagate
Beat the Heat: Designing SDVR Systems for
Optimal Thermal Performance
Introduction
While the popularity of digital video surveillance systems continues to soar (J.P. Freeman Co. estimates worldwide annual growth at
approximately 42 percent), there have been challenges along the way. Surveillance digital video recording (SDVR) system reliability
has proven challenging for some, particularly in terms of the hard disc drive (HDD). This is primarily due to the harsh environmental
and operational factors (poor ventilation, 24x7 write workloads) typical of SDVR disc drive applications.
Fortunately, following a few simple guidelines for optimal SDVR system design and deployment will substantially enhance drive
reliability. The single greatest threat to disc drive longevity is heat. Not only is heat a leading cause of outright component failure, it
can also degrade system performance and stability.To understand why heat management is so critical to disc drive reliability, it’s
useful to briefly review the fundamentals of drive operation.
Disc Drive Basics
HDD storage relies on magnetism to store and retrieve
data on the drive’s platter(s). Tiny independent
magnetic cells in the platter’s coating are magnetically
reoriented into a specific pattern by the drive’s
read/write head to write data, and those cells’
magnetic orientation can be subsequently detected by
that same head to read back that data.
This arrangement is made possible by the
extraordinary proximity of the read/write head to the
platter surface. Riding a scant few nanometers above
the rapidly spinning platter (see Figure 1), the complex
read/write head system has been likened to a Boeing
747 flying at 600 miles per hour—six inches off the
ground.
The strength of any object’s magnetic field rapidly falls
off as distance from it increases; this principle applies
TP552 • From: Global Product Marketing • May 2006
Technology Paper
Figure 1: HDD flying height compared to common environmental contaminants
0.07 μm
Flying
Height
0.5 μm
Spittle
Mark
4.0 μm
Finger Print
Smudge
6.0 μm
Smoke
Particle
10.0 μm
Dust
Particle