root@hunley.homeip.net said:> Now on boot, I see:
> mounted /dev/hda1 on /
> EXT3-fs: mounted filesystem with ordered data mode
> and the exact same thing for /dev/hda3 and /dev/hdb1. they all come up
> and appear to be working. so is this normal? Or did I manage to screw
> up somewhere?
Thats fine.
Further explanation (slightly simplified - if Stephen feels strongly
about it I'm sure he'll give the more accurate expanded version :-) ) :-
The EXT3-fs message is just telling you it mounted the fs OK. Its also
telling you what form of journalling you are using.
ext3 has 2 formats of journal:-
- version 1 - default and only possibility for ext3 releases 0.0.3*
and
earlier
- version 2 - default for filesystems created with 0.0.4 and later
Version 2 journals support additional semantics required to allow
metadata journalling, and provide 2 new forms of journalling - ordered
and writeback. Both V1 & V2 journals support data journalling (where
everything that would go to disk is journalled).
The CHANGES file in the distribution says this:-
New mount options:
"mount -o journal=update"
Mounts a filesystem with a Version 1 journal, upgrading the
journal dynamically to Version 2.
"mount -o data=journal"
Journals all data and metadata, so data is written twice. This
is the mode which all prior versions of ext3 used.
"mount -o data=ordered"
Only journals metadata changes, but data updates are flushed to
disk before any transactions commit. Data writes are not atomic
but this mode still guarantees that after a crash, files will
never contain stale data blocks from old files.
"mount -o data=writeback"
Only journals metadata changes, and data updates are entirely
left to the normal "sync" process. After a crash, files will
may contain stale data blocks from old files: this mode is
exactly equivalent to running ext2 with a very fast fsck on
reboot.
Ordered and Writeback data modes require a Version 2 journal: if you do
not update the journal format then only the Journaled data will be
allowed.
The default data mode is Journaled for a V1 journal, and Ordered for
V2.
--
[ Nigel Metheringham Nigel.Metheringham@InTechnology.co.uk ]
[ Phone: +44 1423 850000 Fax +44 1423 858866 ]
[ - Comments in this message are my own and not ITO opinion/policy - ]