分区表数据结构

struct fdisk_partition {
unsigned char bootid; /* bootable? 0=no, 128=yes */
unsigned char beghead; /* beginning head number */
unsigned char begsect; /* beginning sector number */
unsigned char begcyl; /* 10 bit nmbr, with high 2 bits put in begsect */
unsigned char systid; /* Operating System type indicator code */
unsigned char endhead; /* ending head number */
unsigned char endsect; /* ending sector number */
unsigned char endcyl; /* also a 10 bit nmbr, with same high 2 bit trick
*/
int relsect; /* first sector relative to start of disk */
int numsect; /* number of sectors in partition */
};