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Chapter 5: Installing AVoption XL 27

Pro Tools with No Interchange

In installations where Pro Tools will not be rou-

tinely sharing projects with Avid Media Com-

poser systems, ExpressPro-Tools from ATTO

(provided with Pro Tools 5.1) should be used to

initialize all audio and video drives. Both HFS

and HFS+ file systems are supported for audio

drives. Only HFS is supported for video drives

(HFS+ has not been fully tested with video

drives).

Special Configuration Requirements

When you want compression levels of 2:1 or 1:1

(uncompressed), an additional ATTO UL2D or

EPCI-DC SCSI accelerator is required for video

storage. With the UL2D configuration, a 2-way

stripe set across both SCSI channels is required

for 2:1 capability, and a 4-way stripe across both

channels is required for 1:1 (uncompressed) ca-

pability. It is not necessary to use this configura-

tion if you want compression of 3:1 or higher, or

when an EPCI-DC SCSI accelerator is used for

video storage.

To install:

1 Connect the drives across the two UL2D SCSI

channels.

2 Select and create your stripe set using the

ATTO ExpressRAID software (optional from

ATTO).

3 Initialize all audio drives using ATTO Ex-

pressPro-Tools.

Avid to Pro Tools

For projects originating on an Avid Picture Au-

thoring system, such as Media Composer, a sin-

gle HFS drive initialized with either ADU 2.1 or

later is supported. This drive may contain video

or audio media files. Pro Tools with

AVoption XL supports playback of audio and

video tracks from a single drive, as long as track

count does not exceed one stream of video (at a

compression of 3:1 or higher) and a maximum

of eight audio tracks.

When this drive is used in a Pro Tools session,

additional audio tracks (beyond those imported

from the Avid workstation) should not be

added, for bandwidth reasons.

Drives initialized by Avid Drive Utility 2.1 or

later as 2-way or 4-way are supported in this sce-

nario. It is recommended that drives be added to

the SCSI channel dedicated for video to balance

demands on the SCSI system. Note that

Pro Tools can only recognize a maximum seven

drives per SCSI channel.

Pro Tools to Avid

When a drive is being sent from a Pro Tools sys-

tem to an Avid picture workstation, the drive

should be initialized as HFS using ExpressPro-

Tools. When an Avid system is inheriting files

from Pro Tools, a “finder copy” of these files

may be necessary to transfer them from the

Pro Tools drive to an Avid/AU2 initialized drive.

If a drive is sent from a Pro Tools system to an

Avid workstation so that files can be consoli-

dated and copied to that drive for use on

Pro Tools, the same procedure is required. The

drive should be initialized as HFS in ExpressPro-

Tools before being mounted on the Avid work-

station.

Do not use ExpressRAID to initialize your

audio drives. ExpressRAID is not supported

with audio drives.

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