A separate fileset header is stored at each site where a version of a DCE LFS fileset exists. The header is part of the data structure that records disk addresses on the aggregate where the files in the fileset are stored. This data structure is a method of grouping all of the files into logical units without requiring that they be stored in contiguous memory blocks. In addition, the header records some of the same information that appears in the FLDB. Therefore, even if the FLDB is unavailable, the fts commands can still access the information.
The fts lsheader and fts lsft commands display information from a fileset's header (the fts lsft command also shows information from a fileset's entry in the FLDB). Each fileset header for a DCE LFS fileset contains the following information:
· The name of the fileset, with a .readonly or .backup extension, if appropriate.
· The fileset ID number.
· The type of fileset (RW for read/write, RO for read-only, or BK for backup).
· Information about the state of the fileset.
· The status flag for the site, including On-line, Off-line, or an error condition.
· The File Server machine, aggregate name, and aggregate ID number where the fileset resides. This information, while not in the header, is available because it was used to contact the machine that houses the fileset.
· The ID numbers of the parent, clone, and backup filesets that are related to the fileset.
· The ID numbers of the low-level backing and low-level forward filesets that are related to the fileset.
· The version number of the fileset. Every DCE LFS fileset has a distinct version number that increments every time an operation is performed on the fileset or a file it contains. Version numbers have the same format as fileset ID numbers (for example, 0,,25963).
· The allocation and allocation usage, in kilobytes, of the fileset.
· The quota and quota usage, in kilobytes, of the fileset.
· The day, date, and time that the fileset was created (for read-only and backup versions, this indicates the day, date, and time that the fileset was replicated or backed up).
· The day, date, and time that the contents of the fileset were last updated.
Because non-LFS filesets do not have DCE LFS fileset headers, only such information as the fileset ID number is available from the machine that houses the fileset. The fts lsheader and fts lsft commands display this information.