How does partimage distinguish between free vs. empty blocks
by wfamily_7 - 9/25/11 7:07 PM
I'm trying to figure out exactly how partimage distinguishes
between a free block (containing old/garbage data) and an empty (zero)
block when it comes to disk imaging.
In other words, since "dd" copies all the blocks, what technique does
partimage use that enables it to only clone the used blocks?
Everywhere I've looked online says partimage has this ability, but HOW does it do it?