/*	BEGIN INCLUDE FILE ... disk_table.incl.pl1 ... Created Oct 75 for NSS */


/****^  HISTORY COMMENTS:
  1) change(86-01-14,Fawcett), approve(86-05-13,MCR7383),
     audit(86-05-14,LJAdams), install(86-07-18,MR12.0-1098):
     Add support for subvolumes.
                                                   END HISTORY COMMENTS */


/*		Modified July 1977 by T. Casey to add pdirs_ok switch in lve */
/*		Modified April 1981 by J. Bongiovanni to add shared_spindle_flip */
/*		Modified 831122 by E. A. Ranzenbach to add vacate_pdirs bit to lve. */

/* The disk table lives in ring 1. Its entries parallel the PVT */

dcl  dtp ptr,
     dtep ptr,
     lvep ptr;

     

dcl 1 dt based (dtp) aligned,

    2 n_entries fixed bin (17),			/* number of disk table entries */
    2 max_n_entries fixed bin (17),			/* max number of disk table entries */
    2 n_in_use fixed bin (17),			/* number of disk table entries in use */
    2 rpvx fixed bin,				/* index (pvtx, too) of the RPV */
    2 version fixed bin init (1),
    2 n_lv_entries fixed bin,				/* Number of LV entries */
    2 pad (2) bit (36),
    2 array (0 refer (dt.max_n_entries)) like dte,
    2 lv_array (0 refer (dt.max_n_entries)) like lve;

dcl 1 dte based (dtep) aligned,
    2 drive_name char (8),				/* device name */
    (2 device_type fixed bin (8),			/* device type */
    2 used bit (1),					/* TRUE if this entry is used for paging */
    2 known bit (1),				/* TRUE if label has been read and checked */
    2 storage_system bit (1),				/* TRUE for storage system (vs io disk) */
    2 permanent bit (1),				/* TRUE if cannot be demounted */
    2 deleted bit (1),				/* TRUE if deleted by "deld" */
    2 rpv bit (1),					/* TRUE if the root physical volume */
    2 demounted bit (1),				/* TRUE if was here or was assumed here */
    2 need_salvage bit (1),				/* TRUE if this vol was volsalv'd automatic */
    2 hc_accepted bit (1),				/* TRUE if vol accepted by ring 0 init */
    2 shared_spindle_flip bit (1),			/* used by ring-4 for shared spindle allocation */
    2 is_sub_vol bit (1),
    2 pad bit (3),
    2 lvx fixed bin (11),				/* index in lv_array of lve */
    2 pre_accepted bit (1)) unaligned,			/* TRUE if was used in previous bootload */
    2 sv_num  fixed bin unal,				/* this sv number */
    2 num_of_sv fixed bin unal,			/* number of sv for this pv */
    2 sv_name   char (2) aligned,
    2 pvid bit (36),				/* physical volume ID */
    2 pvname char (32);				/* Physical volume name. */

dcl 1 lve based (lvep) aligned,
    2 lvid bit (36),				/* logical volume ID */
    (2 used bit (1),				/* TRUE if entry used */
    2 hv_mounted bit (1),				/* TRUE if hvol is really OK */
    2 public bit (1),				/* TRUE for public vol */
    2 mounting bit (1),				/* TRUE if mhv is in progress */
    2 demounting bit (1),				/* TRUE if dhv is in progress */
    2 good_candidate bit (1) unal,			/* used for auto dhv */
    2 demounted_only bit (1) unal,			/* lve here only to warm demounted pve's */
    2 pdirs_ok bit (1) unal,				/* TRUE if process directory segments can be on this lv */
    2 prev_bootload bit (1) unal,			/* TRUE if can auto-accept pvs */
    2 vacate_pdirs bit (1) unal,			/* if TRUE we will demand move all perprocess segs */
    2 pad bit (26)) unal,
    2 lvname char (32),				/* Logical volume name */
    2 min_access_class bit (72),			/* Security stuff */
    2 max_access_class bit (72);			/* .. */

/*	END INCLUDE FILE ...disk_table.incl.pl1 */


*/
                                          -----------------------------------------------------------


Historical Background

This edition of the Multics software materials and documentation is provided and donated
to Massachusetts Institute of Technology by Group Bull including Bull HN Information Systems Inc. 
as a contribution to computer science knowledge.  
This donation is made also to give evidence of the common contributions of Massachusetts Institute of Technology,
Bell Laboratories, General Electric, Honeywell Information Systems Inc., Honeywell Bull Inc., Groupe Bull
and Bull HN Information Systems Inc. to the development of this operating system. 
Multics development was initiated by Massachusetts Institute of Technology Project MAC (1963-1970),
renamed the MIT Laboratory for Computer Science and Artificial Intelligence in the mid 1970s, under the leadership
of Professor Fernando Jose Corbato. Users consider that Multics provided the best software architecture for 
managing computer hardware properly and for executing programs. Many subsequent operating systems 
incorporated Multics principles.
Multics was distributed in 1975 to 2000 by Group Bull in Europe , and in the U.S. by Bull HN Information Systems Inc., 
as successor in interest by change in name only to Honeywell Bull Inc. and Honeywell Information Systems Inc. .

                                          -----------------------------------------------------------

Permission to use, copy, modify, and distribute these programs and their documentation for any purpose and without
fee is hereby granted,provided that the below copyright notice and historical background appear in all copies
and that both the copyright notice and historical background and this permission notice appear in supporting
documentation, and that the names of MIT, HIS, Bull or Bull HN not be used in advertising or publicity pertaining
to distribution of the programs without specific prior written permission.
    Copyright 1972 by Massachusetts Institute of Technology and Honeywell Information Systems Inc.
    Copyright 2006 by Bull HN Information Systems Inc.
    Copyright 2006 by Bull SAS
    All Rights Reserved

*/