CF cluster size? at

Go Back   DV Info Net > The Tools of DV and HD Production > External Video Recording Solutions > Convergent Design Odyssey

Convergent Design Odyssey
...and other Convergent Design products.

Thread Tools Search this Thread
Old March 29th, 2010, 01:57 AM   #1
Inner Circle
Join Date: Aug 2006
Location: Poland
Posts: 4,086
CF cluster size?

Dear Dan,

I noticed that SxS cards are by default formatted with 32Kb cluster size, while that of nanoFlash CF cards is just 16Kb. Just out of curiosity, why have Convergent Design chosen this, and not a greater, cluster size? Intuition would tell that for long files, storage media work more efficiently with long clusters...

I'm sure you do have your well-grounded reasons, just would like to learn which.


Sony PXW-FS7 | DaVinci Resolve Studio; Magix Vegas Pro; i7-5960X CPU; 64 GB RAM; 2x GTX 1080 8GB GPU; Decklink 4K Extreme 12G; 4x 3TB WD Black in RAID 0; 1TB M.2 NVMe cache drive
Piotr Wozniacki is offline   Reply With Quote
Old March 29th, 2010, 07:01 AM   #2
Inner Circle
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,417
Dear Piotr,

Choosing a cluster size involves trade-offs.

Any video recording uses a certain number of custers, part of the last cluster is almost always wasted. With a 32KB custer size we would lose up to 32 KB-1. With 16KB we could lose up to 16 KB-1.

From a practical standpoint, 16 KB works fine, as would 32 KB.

We have certain "secret sauce" techniques that make a 16 KB cluster size work as well as a 32 KB cluster size.
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

(800) 223-2500
New York, NY

B&H Photo Video
(866) 521-7381
New York, NY

Texas Media Systems
(512) 440-1400
Austin, TX

Precision Camera
(800) 677-1023
Austin, TX

(800) 323-2325
Mineola, NY

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > External Video Recording Solutions > Convergent Design Odyssey

Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -6. The time now is 10:45 PM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2018 The Digital Video Information Network