On Wed 18-08-10 19:23:07, Anil kumar wrote: > As I understand by default EXT3 uses "data=ordered" journalling mode. In this case, > 1)the Data is written to the disk > 2)MetaData is written to the journal > 3)Transaction complete > > With the above being the case, is there a possibility that if system > crashes there will be filesystem inconsistency. > > My understanding is that it should not as Data is first written to the > disk and if it fails(or incompletes) then there is record of it anyway in > the journal and if system crashes during writing MetaData to the journal > it should be okay as actual Data is already in the Disk. Yes. You can find what mode the filesystem is using by looking at /proc/mounts. It is data=ordered by default but superblock flags can influence this as well and for some time there was a kernel config option so that we defaulted to data=writeback when no other mode was specified... Honza -- Jan Kara <jack@xxxxxxx> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
