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block level and file level transfer (Read 611 times)
toddler
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block level and file level transfer
Nov 21st, 2009 at 3:50pm  
Hello guys,

                   whats the difference between file level transfer and block level transfer? i just know that Fiber Channel SAN and iSCSI use block level transfer and NAS uses file level but i don't the exact differences between them. i googled but in vain. i was not happy with what i got on google. any suggestions please

cheers
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Eros
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Re: block level and file level transfer
Reply #1 - Jan 29th, 2010 at 10:04am  
Pretty simple really!

Block level - Say you have a large file and only part of the file, or 1 block in the file is changed. With block level transfer you only need to send over the block or blocks that have changed.

File level - If a file has changed, the whole file must be re-transferred. If the file was say 10GB, this would be a nightmare.
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