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Some DOs and DON’Tsof Managing a SeismicData Archive

Andy CairnsCGGVeritas (Data Services division)

PPDM Data Management ConferenceSeptember 2010



September 2010 PPDM Data Management Conference 2

Introduction

Question:

Why am I limiting this to SEISMIC?

Answer:

Seismic typically represents the biggeststorage volume…

Third parties are almost always involved…

Many people think it should be easy.




Introduction

These DOs and DON’Ts are not intended to

be an exhaustive list.

They reflect my observations from a ServiceProvider perspective.

They may help prevent bad “good ideas” being introduced.




Introduction

Managing a seismic archive is far more than

just physical storage of media.

It requires a good database and goodprocedures…

It requires reliable subcontractors.

Legacy data requires maintenance.




Agenda

MEDIA-related DOs and DON’Ts

PROCESS-related DOs and DON’Ts

ATTITUDE-related DOs and DON’Ts






MEDIA-related DOs & DON’Ts

DO:

Stick with de facto industry standards withregards to media for long term archive.

DON’T:

Be tempted to lead the pack with regards toimplementing new technologies.





In the last 40-odd years, there has been a

relatively simple progression in terms of ade facto industry standard media:

- 9-track tape

- 3480/3490 cartridge

- 3590B cartridge (10GB)

- 3592-E05 cartridge (500GB)





IBM 3590 & 3592 Technology

IBM 3592 Drives

3592-J1A TS1120 TS1130 ?

Media

JJ 60GB 100GB 128GB ?

JA 300GB 500GB 640GB ?

JB - 700GB 1000GB ?

IBM 3590 Drives

3590B3590B

(x2)3590E 3590H

Media

Blue "J" 10GB 10GB 20GB 30GB

Green "K" - 20GB 40GB 60GB





DO:

Take advantage of low cost, high capacitymedia (e.g. 3592 tape) to reduce storage

volume and costs.

DON’T:

Be tempted to put too much data on eachcartridge.





What constitutes too much data?

A tape that is 100% full may be difficult tocopy (e.g. limit to 95% capacity).

A tape with too much data will limit theability to provide descriptive content on

the label.

A tape with too much unrelated data mixedtogether will be difficult to manage.





DO:

Select good quality media.

DON’T:

Write tapes with compression on.

DO:

Ensure guidelines on media handling areunderstood and followed.




Agenda



ATTITUDE-related DOs and DON’TsATTITUDE-related DOs and DON’Ts





PROCESS-related DOs & DON’Ts

DO:

Ensure consistency in database entries forrelated items.

SURVEY LINE TYPEXYZ ABC1 FLD

XYZ-81 ABC-01 PROC

XYZ ABC01 Processed

XYZ-1981 Navigation





DO:

Plan to migrate data from legacy (outdated)media in your archive.

DON’T:

Leave it too late such that data loss willoccur through deterioration or because the

hardware capability to migrate is lost.





9-track tape deterioration (sticky or

shedding oxide) is a well known problem.

The life of modern media will also depend onmanufacturing, handling, environment,

tape drive maintenance, etc.





DO:

Differentiate between long term archivaldata and short term active data.

DO:

Have a method for identifying multiplecopies of the same data.





DO:

Have at least two copies of archived data.

DON’T:

Store them together!





DO:

Develop and impose content standards (e.g.SEGY headers, label content, digital

transmittals).

DON’T:

Introduce “standards” that createunnecessary compatibility issues.





DO:

Cull tapes that are clearly no longerrequired.

DON’T:

Cull tapes without strong procedures inplace!




Agenda









ATTITUDE-related DOs & DON’Ts

DO:

Become familiar with media and formats thatyou will encounter, and understand issues

associated with copying, reformatting,subsetting.

DON’T:

Be afraid to ask questions!





DO:

Consider 3rd party QC of newly receivedtapes (especially if you won’t be reading

them).

DON’T:

Assume that the data you receive will alwaysbe as reported.





DO:

Appreciate that physical storage,transcription, data loading and processing

are all quite different disciplines.

DO:

Look for best-of-breed in each discipline…





And Finally, as with most things in life…

DON’T:

Automatically go for the cheapest option!

If you pay peanuts you get monkeys…

James Goldsmith



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Some DOs and DON’Tsof Managing a SeismicData Archive

Andy CairnsCGGVeritas (Data Services division)

PPDM Data Management ConferenceSeptember 2010

QUESTIONS?

dosdon'tsmanagingseismicdataarchive cairns[1]

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