Fascinating thread. Sorry for bumping an old thread, but there are so many things that can be discussed about allocation sizes...
Originally Posted by Suntan
I wouldn't use anything less than 64K for any drive that I expect to use to record/dvr TV shows. But that's just me.
Look at it a different way, let's say you have 10,000 files (movies and pictures) on your media drive (possibly somewhat high of a number for the average person, but I have at least twice that many on my photo drive.) Now to make the math easy, let's say you choose between 4KB clusters and 64KB clusters. To further simplify, let's say that each file you load on there was sized just so that 4KB clusters would result in completely optimized filling of the HDD and yet the files would always waste the left over 60KB of space in a 64KB cluster (this wouldn't happen as most of the time a file would leave even some of the 4KB cluster wasted and it would also fill more of the 64KB cluster too.)
Now, assuming 60KB wasted for *each* file in this worse case comparison, you will be losing all of 600MB if you picked 64KB instead of 4KB.
If 600MB of storage lost is too much for you, then pick a smaller block size.
Very interesting. What would you say is the cut-off size or the least you would recommend for the highest allocation formats? For example, if the least someone has is a 10mb file, or for video files, say a 250MB file, would the 64kb cluster be the best choice? If so, this is the case for a large amount of files, really - I wouldn't even consider using an external hard drive for small documents and such. I'm currently trying out various allocation size structures; right now, I'm doing a full format of a EHD (with a 16kb cluster to start off with), then after it's done experiment with a quick format for the 32kb and 64kb clusters. Any input on this would be highly appreciated.