WD RE2 Overview
With 1.2 million hours MTBF, 3 Gb/s SATA technology, and enhanced vibration
tolerance, WD RE2 drives offer an ideal combination of reliability, high
capacity, and optimum performance for enterprise applications.
- Superior reliability - Designed and manufactured to provide server-class
reliability in high duty cycle environments. With 1.2 million hours MTBF,
these drives have the highest available reliability rating on a
- High capacity - Up to 750 GB of storage packed with server-class
features and low cost-per-gigabyte value.
- Fast - With 3 Gb/s data transfer rate, native command queuing (NCQ), and
16 MB cache, these drives deliver optimum performance.
- Low power - Active Power Save delivers best-in-class seek mode power
consumption through an advanced WD firmware which conserves power in active
seek modes without degrading performance.
- RAID-specific, time-limited error recovery (TLER) - Significantly
reduces drive fallout caused by the extended hard drive error-recovery
processes common to desktop drives.
- Rotary Acceleration Feed Forward (RAFF) - Provides enhanced vibration
tolerance by optimizing operation and performance when the drives are used
in vibration-prone, multi-drive systems such as rack-mounted servers or
- Perpendicular Magnetic Recording (PMR) - WD RE2 drives employ PMR
technology to achieve even greater areal density.
Frequently Asked Questions
||Regular 7200 RPM desktop drives run fine in RAID environments; why
do I need these drives?
||Unlike regular desktop drives, WD RE2 hard drives are engineered and
manufactured to enterprise-class standards and include features such as
time-limited error recovery, Active Power Save, and RAFF that make them
an ideal solution for RAID.
||What is time-limited error recovery and why do I need it?
||Desktop drives are designed to protect and recover data, at times
pausing for as much as a few minutes to make sure that data is
recovered. Inside a RAID system, where the RAID controller handles error
recovery, the drive needn't pause for extended periods to recover data.
In fact, heroic error recovery attempts can cause a RAID system to drop
a drive out of the array. WD RE2 is engineered to prevent hard drive
error recovery fallout by limiting the drive's error recovery time. With
error recovery factory set to seven seconds, the drive has time to
attempt a recovery, allow the RAID controller to log the error, and
still stay online.
||Don't I need SCSI data integrity For RAID environments?
||These drives include 32-bit CRC error checking for all bits
transmitted: command, data, and status and error checking to compare the
data read back from the hard drive to the data originally written to the
Servers, SAN/NAS, scientific computing, life sciences, video
surveillance, enterprise backup, document/image management, audio/video
media applications, and other demanding write-intensive applications.