When creating a directory entry for the journal, always read at least the fragment, and write the full block. Reading less might not work due to device sector size bigger then size of direntries in the last directory fragment.
When creating a directory entry for the journal, always read at least
the fragment, and write the full block. Reading less might not work
due to device sector size bigger then size of direntries in the
last directory fragment.

Reported by:	bz
In collaboration with:	pho
Reviewed by:	jeff
Tested by:	bz, pho

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