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 A file system is called Journalised File System because the VG keeps a LOG of the modifications on a particular LV (jfslog) acting like a 'redolog'. The jfslog is replayed in case of a crash (super-block marked dirty) when the FS is mounted again. A FS can be unmounted only if no processes have opened any file (ie: fuser -xcu /a15jfs ) or have used a subdirectory as the current directory (pwd) (fuser -fcu ...). The FAT characteristics can be set-up only at creation time (nb inode versus max size of an inode).

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Last Update : $Date: Dec 02 2001 23:20:00 $