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- /* @(#)dkbad.h 1.1 86/09/27 SMI; from UCB 4.3 81/05/10 */
-
-
- /*
- * Definitions needed to perform bad sector
- * revectoring ala DEC STD 144.
- *
- * The bad sector information is located in the
- * first 5 even numbered sectors of the last
- * track of the disk pack. There are five
- * identical copies of the information, described
- * by the dkbad structure.
- *
- * Replacement sectors are allocated starting with
- * the first sector before the bad sector information
- * and working backwards towards the beginning of
- * the disk. A maximum of 126 bad sectors are supported.
- * The position of the bad sector in the bad sector table
- * determines which replacement sector it corresponds to.
- *
- * The bad sector information and replacement sectors
- * are conventionally only accessible through the
- * 'c' file system partition of the disk. If that
- * partition is used for a file system, the user is
- * responsible for making sure that it does not overlap
- * the bad sector information or any replacement sector.s
- */
-
- struct dkbad {
- long bt_csn; /* cartridge serial number */
- u_short bt_mbz; /* unused; should be 0 */
- u_short bt_flag; /* -1 => alignment cartridge */
- struct bt_bad {
- u_short bt_cyl; /* cylinder number of bad sector */
- u_short bt_trksec; /* track and sector number */
- } bt_bad[126];
- };
-
- #define ECC 0
- #define SSE 1
- #define BSE 2
- #define CONT 3
-