From Fedora Project Wiki

The following metadata was found in MoinMoin that could not be converted to a useful value in MediaWiki:

  • ext3: in-kernel fs/group blocks cleanup and fix for 32bit ext3
  • 48: bit on-disk i_file_acl to support xttar for 48 bit ext3
  • percpu: count data type changes to support 64 bit ext3 free blocks count
  • 64bit: metadata changes
  • sector_t: overflow check for 32bit/48bit ext3 at mount/resize time