Here's a rough sketch of the approach I would take. Fill in the code to match the comments.

# A hash can keep the interesting info for each server.
# For every line of input,
  # If this line introduces a new server,
    # Create a new empty server structure in the hash.
  # If this line introduces a new partition,
    # Add a new partition structure in the current server.
  # If this line has interesting information,
    # Assert it into the current server and/or partition.
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When you're done, you have a breakdown of each server and its interesting information. An example hash is dumped below.

$VAR1 = { 'server1' =>
               { 'part1' =>
                      { total => 300,
                        free => 100,
                        used => 200 } },
          'server2' =>
               { 'part1' =>
                      { total => 200,
                        free => 100,
                        used => 100 },
                 'part2' =>
                      { total => 400,
                        free => 100,
                        used => 300 } } };
[download]

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