usr/include/disktab.h

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *      @(#)disktab.h   5.2 (Berkeley) 10/1/85
 */

/*
 * Disk description table, see disktab(5)
 */
#define DISKTAB         "/etc/disktab"

struct  disktab {
        char    *d_name;                /* drive name */
        char    *d_type;                /* drive type */
        int     d_secsize;              /* sector size in bytes */
        int     d_ntracks;              /* # tracks/cylinder */
        int     d_nsectors;             /* # sectors/track */
        int     d_ncylinders;           /* # cylinders */
        int     d_rpm;                  /* revolutions/minute */
        int     d_badsectforw;          /* supports DEC bad144 std */
        int     d_sectoffset;           /* use sect rather than cyl offsets */
        struct  partition {
                int     p_size;         /* #sectors in partition */
                short   p_bsize;        /* block size in bytes */
                short   p_fsize;        /* frag size in bytes */
        } d_partitions[8];
};

struct  disktab *getdiskbyname();