[nzlug] Ext3 file system

[Daniel Pittman]

cr <cr at orcon.net.nz> writes:
> On Monday 30 October 2006 22:33, Daniel Pittman wrote:
>> cr <cr at orcon.net.nz> writes:
>> > Can anyone tell me - is there any quick easy way to tell if a
>> > filesystem has been 'converted' to Ext3?  Is it safe to run 'tune2fs'
>> > on a system that's ext3 already?
>>
>> Do you mean, does it have a journal?  Sure.
>>
>> Run 'tune2fs -l /dev/diskNN', and that will report a read-only listing
>> of the features enabled on the server.
>
> Thanks, that's what i was looking for.   
>
> I know ext3's have a journal, but I gather from the literature that it
> won't always show up with a ls -a (at least I think that's the meaning
> of the stuff I've read).

No, it won't.  It is attached to inode 8; that has no directory entries
pointed to it and is "special."

You might find a /.journal file on some systems where an online ext2 to
ext3 conversion was performed with very old versions of the tools, but a
modern fsck will remove the link while retaining the journal data.

Regards,
        Daniel
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