@nekroskop, post #5
@juen, post #8
@krzysiek95, post #10
@wali7, post #13
@Stoopi, post #11
@Stoopi, post #21
@Arturo, post #23
@krzysiek95, post #24
@Stoopi, post #25
@krzysiek95, post #17
Examples:
A 500 MB partition with 512 bytes per block = 256 KB of RAM required
A 1 GB partition with 4096 bytes per block = 64 KB of RAM required
A 1 GB partition with 512 bytes per block = 0.5 MB of RAM required
A 64 GB partition with 512 bytes per block = 32 MB of RAM required
A 64 GB partition with 4096 bytes per block = 4 MB of RAM required
So always use the bigger blocks you can afford as you will save more
RAM at the expense of storage space.