Good block size for disk-cloning with diskdump (dd)
Problem
I use dd in its simplest form to clone a hard drive: However, I read in the manpage that dd knows a blocksize parameter. Is there an optimal value for the blocksize parameter that will speed up the cloning procedure?
Error Output
dd if=INPUT of=OUTPUT
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1 Fix
Fix for: Good block size for disk-cloning with diskdump (dd)
dd will happily copy using the BS of whatever you want, and will copy a partial block (at the end). Basically, the block size (bs) parameter seems to set the amount of memory thats used to read in a lump from one disk before trying to write that lump to the other. If you have lots of RAM, then making the BS large (but entirely contained in RAM) means that the I/O sub-system is utilised as much as possible by doing massively large reads and writes - exploiting the RAM. Making the BS small means …
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