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March 29th, 2010, 01:57 AM
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Inner Circle
Join Date: Aug 2006
Location: Poland
Posts: 4,086
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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. Thanks, Piotr
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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 |
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March 29th, 2010, 07:01 AM
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#2 |
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Inner Circle
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,421
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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.
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Dan Keaton Augusta Georgia |
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