Western Digital Purple PR1334M, Техническое справочное руководство

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WD Purple PR1334M Description and Features
2679-800084-A04 RELEASED 5/3/17 (WD CONFIDENTIAL) 1
1.0 D
ESCRIPTION AND
F
EATURES
1.1 General Description
WD Purple Surveillance Storage is built for 24/7 always-on surveillance in high-
definition security systems that utilize higher hard drive bay counts 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 pro-
tection, and hot plug support.
•
AllFrame 4K™ — All WD Purple™ drives are equipped with AllFrame 4K™ tech-
nology, 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.
•
Premium Protection -- Designed with tarnish-resistant components, this WD Pur-
ple drive offers premium protection in harsh environments where surveillance sys-
tems may be installed.
•
IntelliSeek™ — Calculates optimum seek speeds to lower power consumption,
noise, and vibration.
•
Dynamic Fly Height Control — Designed to compensate for head/media separa-
tion 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 magneti-
zation of each data bit is aligned vertically to the spinning disk, rather than longi-
tudinally 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 record-
ing, 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 manufac-
turers 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 addi-
tional disk revolutions or head actuator movement. This improvement can be
achieved though Native Command Queuing (NCQ ), which is supported by these
hard drives.