GJournal (hopefully) final patches.

Robert Watson rwatson at FreeBSD.org
Fri Aug 11 13:33:45 UTC 2006

On Fri, 11 Aug 2006, Pawel Jakub Dawidek wrote:

> 2. Confirm that partition with your file system is _not_ 4 sectors
>   aligned. If it is not 4 sectors aligned, it is safe for gjournal to
>   use its last sector for metadata. You can verify this by running:
> 	test `diskinfo /dev/<data_partition> | awk '{print $4}' | xargs -J X echo X % 4 | bc` -eq 0 && echo ok || echo not ok
> Then you need to run those commands:
> 	# gjournal label /dev/<data_partition> /dev/<journal_partition>
> 	# tunefs -n disable -J enable /dev/<data_partition>.journal

Sounds like a "gjournal testalignment /dev/partition" would be a very useful 
thing.  Or even just doing it as part of gjournal label?

Robert N M Watson
Computer Laboratory
University of Cambridge

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