Description And Features; General Description; Product Features - Western Digital Blue WD20SPZX Technical Reference Manual

1.0 D
ESCRIPTION AND
1.1

General Description

WD Blue 2.5-inch drives offer fast performance and low power consumption, making
them ideal for notebooks and other portable devices.
1.2

Product Features

Serial ATA (SATA): Serial ATA is the bus interface for 2.5 inch hard drives. The

product supports SATA Gen 3, 6Gbps.
Advanced Format (AF): Technology adopted by WD and other drive

manufacturers to increase media format efficiencies, thus enabling larger drive
capacities.
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.
Reduced Power Spinup (RPS): WD's optimized start up feature specifically

designed for the external hard drive and Consumer Electronics (CE) market.
Specific focus for RPS is to minimize the duration and magnitude of the peak
power consumption from the hard drive.
System-on-Chip: The System-on-Chip (SOC) is the foundation for WD's next

generation electronics and firmware architecture. The native SATA SOC lowers
component count by integrating a hard disk controller, high performance
processor, high speed execution SRAM, and read channel in a 172-pin package.
S.M.A.R.T. Command Transport (SCT): The SCT Command Transport feature set

provides a method for a host to send commands and data to a device and for a
device to send data and status to a host using log pages.
Reliability Features Set-Data Lifeguard™: Representing WD's ongoing

commitment to data protection, Data Lifeguard includes features that enhance
the drive's ability to prevent data loss. Data Lifeguard data protection utilities
include thermal management, an environmental protection system, and
embedded error detection and repair features that automatically detect, isolate,
and repair problem areas that may develop over the extended use of the hard
drive. With these enhanced data reliability features, the drive can perform more
accurate monitoring, error repair, and deliver exceptional data security.
Hot Plug Support: SATA supports hot plugging (also known as "hot swapping"),

the ability to swap out a failed hard drive without having to power down the
system or reboot. This capability contributes to both data availability and
serviceability without any associated downtime, making it a critical feature for
extending SATA into enterprise applications.
Active LED Status: These drives support external LED requirements. It provides an

activity LED output which is ON during command execution and OFF otherwise.
Fluid Dynamic Bearings (FDB): A bearing design that allows ultra-low rotational

drag while providing high lateral stiffness to steadily hold the spinning center of
the diskpack for high-accuracy of reading and writing of data. FDB provide

Description and Features

F
EATURES
WESTERN DIGITAL CONFIDENTIAL
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