Mumia W.. wrote: > David Brodbeck wrote: > > However, it doesn't journal data, only metadata, so you may lose a > > bit of data if the system goes down uncleanly. The filesystem > > will be protected from corruption, however. (Ext3fs can also be > > configured this way, but its default is to journal data as well as > > metadata.) > > It was my understanding that, by default, ext3 only journals metadata. > You have to use one of the "journal_data*" options specified in "man > tune2fs" to get ext3 to journal data.
This is a change between the way that it used to be and the way that it is now. See this FAQ: http://batleth.sapienti-sat.org/projects/FAQs/ext3-faq.html "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. The default data mode is Journaled for a V1 journal, and Ordered for V2. Bob -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
