[CentOS] default journal mode of ext3

[John Doe]

From: Yungwei Chen <yungwei at resolvity.com>

> I found some articles (like https://bbs.archlinux.org/viewtopic.php?id=75152) on 
> the Internet saying that the default journal mode is writeback. Is that correct?
> And is the journal mode of the following device writeback too? Thanks.

mount man page says:
  data={journal|ordered|writeback}
              Specifies the journalling  mode  for  file  data.   Metadata  is
              always  journaled.   To use modes other than ordered on the root
              filesystem, pass the mode to the kernel as boot parameter,  e.g.
              rootflags=data=journal.

It seems to say that the defaults are:
  meta: always journaled
  data: ordered

JD