Western Digital Purple PR1000M, Technical Reference Manual

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P
RODUCT
F
EATURES PR1000M
14 RELEASED 5/8/17 (WD CONFIDENTIAL) 2679-800020-A03
3.1 SATA 6 Gb/s
SATA 6 Gb/s is the next generation interface for SATA hard drives. It adds to the
functionality of the SATA 1.5 Gb/s interface with the following features:

Native Command Queuing (NCQ ) — server feature for performance in random I/
O transaction environments. It aggregates many small random data transfers and
allows the disk to reorder the commands in a sequential order for faster access.

Improved Power Management — provides improved power management
features including Host Initiated SATA Power Management (HIPM) and Device
Initiated SATA Power Management (DIPM).

Staggered Spin-up — allows the system to control whether the drive will spin up
immediately or wait until the interface is fully ready before spinning up.

Asynchronous Signal Recovery (ASR) — robustness feature that improves signal
recovery.

Enclosure Services — defines external enclosure management and support
features.

Backplane Interconnect — defines how to lay out signal line traces in a
backplane.

Auto-activate DMA — provides increased command efficiency through
automated activation of the DMA controller.

Device Configuration Overlay (DCO) — allows hiding of supported features via a
SATA feature mask.
3.2 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.
3.3 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. Spin speed is reduced but optimized through a special blend of
channel capability, electronics through-put capability, and mechanical resonances to
achieve low power consumption.
3.4 IntelliSeek
WD’s unique IntelliSeek technology proactively calculates an optimum seek speed to
eliminate hasty movement of the actuator that produces noise and requires power,
which is common in other drives. With IntelliSeek, the actuator’s movement is
controlled so the head reaches the next target sector just in time to read the next
piece of information, rather than rapidly accelerating and waiting for the drive
rotation to catch up. This smooth motion reduces power usage by more than 60
percent compared with standard drives, as well as quiets seek operation and lowers
vibration.