GRASS VALLEY REV PRO Guía de inicio rápido

REV PRO

Technical

Guide

REV PRO TECHNICAL GUIDE

REV PRO™media and drives are speciﬁcally designed

and developed to meet the requirements of video pro-

fessionals and their desire to migrate to a complete ﬁle-

based workﬂow. REV PRO’s revolutionary Removable

Rigid Disk (RRD) technology combines the beneﬁts of

hard drive technology (speed, reliability, and non-linear

access) with videotape (portability, ease of use, and low

cost). The end result is an extremely durable and reliable

medium, fully supporting professional video workﬂows.

REV PRO media provide fast random access to video

clips. Files can be edited and moved around easily—just

like a hard drive. REV PRO media are well suited for

high-speed data transfers and perfect for true HD acqui-

sition and editing. Its enhanced multi-segment caching

delivers dual-stream performance to allow for simultane-

ous read and write access. REV PRO is ideally suited for

everyday video, graphics, and/or rigorous ﬁeld produc-

tion applications. It is a medium that is ﬂexible and can

be readily re-purposed in any ﬁle-based workﬂow. There

are currently two lines of REV PRO media and drives:

The REV PRO 35 line and the REV PRO XP/ER line.

REV PRO combines the best of both worlds: the portability and

ease of use of tape, with the non-linear access capabilities of

hard drives.

REV PRO provides dual stream performance for

simultaneous record and playback or real-time cross

dissolves in editing environments.

Single Stream

REV PRO 35REV PRO ERREV PRO XP

Dual

Streams

110

Dual

Streams

Dual

Streams

130

190

REV PRO TECHNICAL GUIDE

Single Stream

Perf. (Mb/s)

Dual Stream Perf.

(Mb/s)

Capacity

(GB)

SD @25 Mb/s

Recording Time

HD @75 Mb/s

Recording Time

ER, optimized for

Extended Record

times

130-240 2X 65 65 >240 >80

XP, optimized for

eXtra Performance 170-240 2X 85 40 >140 >50

REV PRO 35 110-204 2X 55 35 >120 >45

Record Time Comparison of Common SD/HD Data Rates on REV PRO Media

Storage Capacity

REV PRO media have the storage capacity of up to

80 minutes of HD and up to 4 hours of SD material,

depending on the chosen codec and bit rate. High

performance, sustained data rates allow for real-time

record/play capability directly from the media. REV PRO

allows users to record and play back two simultaneous

HD streams with enough added bandwidth for audio and

metadata.

Durability

REV PRO media use standard 2.5-inch laptop hard drive

components, but are engineered for much greater dura-

bility and reliability by placing only the magnetic medium

and motor within the removable cartridge and adding

additional redundancy to the medium. The drive’s heads

and electronics remain in the drive assembly.

The media can be used in harsh environments and are

resistant to damage within extreme operating tempera-

tures, dust, wind, moisture, high altitudes, shock, and

vibration. The Grass Valley™Digital Media Camcorder

(DMC) and Digital Media Recorder (DMR) protect the

media even beyond this level.

The disk and drive have been designed to perform a

greater number of insertions than any other type of

removable media. Additionally, each disk can perform

over one million record/erase cycles without failure.

REV PRO Highlights

Temperature

Ambient Operating Environment -10 to 60ºC (14 to 140ºF)

Ambient Non-Operating Environ. -40 to 65ºC (-40 to 149ºF)

Humidity

Ambient Operating Humidity 8 to 90% R.H. (Non-condensing)

Ambient Non-Operating Humidity 5 to 95% R.H. (Non-condensing)

Electrostatic Discharge Up to 8 KV air discharge,

4 KV contact

Altitude

Operating -300 to 4,572 meters (15,000 ft.)

REV PRO TECHNICAL GUIDE

Drive chassis

Disk retention

mechanism

Drive shutter

elastomeric seal

Head stack assembly

Drive electronics (PCB)

Eject motor

Eject mechanism

Control interface

connector

REV PRO drive exploded view

REV PRO Drive Exploded View

Hard disk platter

Desiccant

(moisture regulating)

Disk housing

Spindle motor

Disk shutter

elastomeric seal

Contamination ﬁlter

Electronic connection

to drive assembly

REV PRO disk exploded view

The REV PRO system is composed

of a drive assembly and a removable

disk—adding unlimited expandability

and ﬂexibility to your workﬂow.

REV PRO Disk Exploded View

REV PRO TECHNICAL GUIDE

Contamination Control

REV PRO removable hard drive-based media have been

designed with a comprehensive set of tools that control

and mitigate the effects of contamination. The result

of extensive research and practical testing led to the

development of a simple contamination strategy for REV

PRO: start clean, stay clean.

REV PRO employs a unique, patented labyrinth-type

design, which features multiple seals for a very effec-

tive barrier to outside contaminants such as airborne

particulates, gasses, and corrosion. A unique two-stage

shutter mechanism does not open until the disk is com-

pletely seated in the drive. This start-clean, stay-clean

mechanism is designed to keep the heads and media in

a virtual clean room environment.

REV PRO incorporates a charcoal desiccant inside each

cartridge to provide additional protection from mois-

ture, corrosion, and out-gassing. Advanced ﬁltration,

automatic head cleaning, and robust two-stage error

correction are employed to ensure high data integrity

and reliability. The media design also includes a robust

recirculation ﬁlter on each cartridge to ﬁlter the air inside

the cartridge each time the disk spins, effectively remov-

ing any airborne contaminants that made it past the

cartridge seal.

As a comparison, videotape and optical disks are open

media with few safeguards against exposure to outside

elements that can contaminate or optically block record-

ing heads and erode stored media.

REV PRO Drive REV PRO Disk

Shutter door

Retention mechanism

Clean zone

Shutter door

Retention

pocket

Seal

Heads

A two-stage shutter mechanism—one in the drive,

the other in the disk—creates a virtual clean room

environment inside the REV PRO drive assembly.

Filter

Desiccant

HDD platter

Labyrinth air chamber

REV PRO uses an advanced ﬁltration system and

labyrinth-type cartridge construction to control

contamination.

REV PRO TECHNICAL GUIDE

Guaranteed Archival Lifespan

The REV PRO media long-term archival rating is speci-

ﬁed to over 30 years. The engineers designed RRD tech-

nology to ensure long shelf life by identifying the causes

of long-term media degradation and engineered REV

PRO to minimize those speciﬁc effects. Normal factors

of long-term media degradation include thermal stability,

self-demagnetization, media corrosion, motor or connec-

tor failure, particulate inﬁltration, contamination, out-gas-

sing, and adhesive breakdown. All of these factors have

been addressed and dealt with for REV PRO.

To prevent issues of adhesive breakdown, REV PRO car-

tridges use only high-quality, HDD-approved adhesives

for mounting the internal desiccant and ﬁlter inside the

cartridge housing. The adhesive is rated for continuous

80ºC (176ºF) conditions.

Unlike REV PRO media, videotape can deteriorate rap-

idly over time as a result of exposure to oxygen, atmo-

spheric moisture, and heat—a process called hydrolysis.

Remaining amplitude after 30 years (%)

Thermal decay rate (% decade)

100

97.5

92.5

87.5

0.2 0.4 0.6 0.8 0.8

70 Gb/in.2

1.2

Even at constant 70˚C (158˚F) temperatures, REV PRO media decays less than 1% every

ten years.

REV PRO TECHNICAL GUIDE

Summary

REV PRO removable disk-based media offer unprec-

edented durability and performance, in media that can

support video recording, playback, storage, archival and

high capacity transport. It provides a truly open solution

for ﬁle-based production workﬂows.

Technical Features at a Glance

Different capacities to support various workﬂow•

requirements and pricing

Media data transfer rate to support in the ﬁeld editing•

and fast ingest

12 msec average seek time•

30-year shelf life•

Two-level enhanced error correction code (ECC)•

www.grassvalley.com

SALES

Local and regional sales contacts can be found by visiting

www.grassvalley.com/sales

SUPPORT

Local and regional support contacts can be found by visiting

www.grassvalley.com/support

tradenames referenced are service marks, trademarks, or registered trademarks of their respective companies. Speciﬁcations subject to

change without notice. GV-3069M-1

REV PRO TECHNICAL GUIDE

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