HFS+ Block Size

[skijor]

Does anyone know the block or sector size of the HFS+ (journaled) filesystem? Is it the traditional unix 512 bytes? I am writing a b-tree algorithm and need to create leaf node records that are equal in size to one disk block

 

[DeltaMac]

This article should tell you everything you need (or could ever want) to know about the HFS plus volume format:
http://developer.apple.com/technotes/tn/tn1150.html