Hi Darren,
After review all discussions so far, following is what we want to do. Can you
help me, or give me some suggestions how can I achieve this?
For various purposes in the engineering work we do to validate
our disk controller product, we need to be able to ascertain what LBAs on the
disk actually correspond to a given file written out under ZFS. Once a file is
written and closed, we want to be able to traverse associated ZFS directory and
allocation structures to uncover where ultimately the data sectors for the file
live on the disk. To understand this, we want to write a utility that "walks"
through the relevant file system housekeeping objects winding through until we
have all the pieces uncovered which allow us to translate a given offset of a
file to actual LBAs on the disk.
It is our understanding that there may be some utilities which
perform similar operations (or at least contain a lot of the traversing logic
we would require). Can you please point us in the right direction for requisite
documentation and related source code? Any other information and/or suggestions
would be greatly appreciated.
Thank you very much. Hope you had a good and fun Halloween day.
Thai.
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