The block dialog interprets a block and it's various fields.
At the top of this dialog is the "File Range Control". The file range control gives you a quick graphical view of where in the file this block is located.
The block trailer dialog includes an interpretation of the fields of the block trailer structure. They include:
- cb (Disk Aligned) The size of the block, and the aligned version (rounded up)
- wSig The block signature. This is based on the block id and location of the block on disk
- dwCRC The CRC of the block. This is validated everytime the block is read from disk.
- bid The block id of the block. This is the key into the BBT to find the block.
Below the block trailer is the contents of the block. External blocks are "decoded" according to the encoding type in the header, so the bytes you see aren't the exact same bytes found on disk in this case. You can choose how to view the bytes;
in hex, binary, or as a unicode string.