Western Digital Purple PR1000M, Technical Reference Manual

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PR1000M
D
ESCRIPTION AND
F
EATURES
2679-800020-A03 RELEASED 5/8/17 (WD CONFIDENTIAL) 1
1.0 D
ESCRIPTION AND
F
EATURES
1.1
G
ENERAL
D
ESCRIPTION
WD Purple Surveillance Storage is built for 24/7 always-on surveillance in high-
definition security systems that use up to eight hard drives and up to 64 cameras.
Exclusive AllFrame 4K
™
technology works with ATA streaming to reduce error
pixilation and video interruptions that occur when desktop hard drives are incorrectly
used as storage in security systems.
1.2 Product Features

Serial ATA (SATA) — Serial ATA (SATA) is the industry standard bus interface for
hard drives. It is designed to replace Parallel ATA, and has many advantages
including increased transfer rate, improved signal integrity, enhanced data
protection, and hot plug support.

AllFrame 4K™ — All WD Purple™ drives are equipped with AllFrame 4K™
technology, which improves ATA streaming to help reduce frame loss, improve
overall video playback, and increase the number of hard drive bays supported
within a NVR. Help make your surveillance solution future-ready knowing that WD
Purple™ drives are ready for ultra high definition cameras.

IntelliPower™ — A fine-tuned balance of spin speed, transfer rate and caching
algorithms designed to deliver both significant power savings and solid
performance. Additionally, these drives consume less current during startup
allowing lower peak loads on systems as they are booted.

IntelliSeek™ — Calculates optimum seek speeds to lower power consumption,
noise, and vibration.

Dynamic Fly Height Control — Designed to compensate for head/media
separation changes due to temperature and altitude. This feature adds video
quality margins across temperature and altitude changes.

Perpendicular Magnetic Recording (PMR) — With PMR technology the
magnetization of each data bit is aligned vertically to the spinning disk, rather
than longitudinally as has been the case in hard drive technology for decades.
This enables more data on a given disk than is possible with conventional
longitudinal recording, and provides a platform for future expansion of hard drive
densities.

NoTouch™ Ramp Load Technology — The recording head never touches the disk
media ensuring significantly less wear to the recording head and media as well as
better drive protection in transit.

Dual Stage Actuator Technology — A head positioning system with dual-stage
actuators that improves positioning accuracy over the data track(s). The primary
stage provides course displacement; the secondary stage uses piezo electric
motion to fine tune the head positioning to a higher degree of precision.

Advanced Format (AF) — Technology adopted by WD and other drive
manufacturers as one of multiple ways to continue growing hard drive capacities.
AF is a more efficient media format that enables increased areal densities.

Native Command Queuing (NCQ ) — Performance of a random I/O workload can
be improved through intelligent re-ordering of the I/O requests so they read/
write to and from the nearest available sectors and minimize the need for
additional disk revolutions or head actuator movement. This improvement can be
achieved though Native Command Queing (NCQ) , which is supported by these