[thirdparty/util-linux.git] / fdisk / fdiskbsdlabel.h

/*
 * Copyright (c) 1987, 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <linux/types.h>	/* for __u32, __u16, __u8, __s16 */

#ifndef BSD_DISKMAGIC	/* perhaps from <linux/genhd.h> */
#define BSD_DISKMAGIC     ((__u32) 0x82564557)
#endif

#ifndef BSD_MAXPARTITIONS
#define	BSD_MAXPARTITIONS 8
#endif

#define BSD_LINUX_BOOTDIR "/usr/ucb/mdec"

#if defined (i386) || defined (__sparc__) || defined (__arm__) || defined (__mips__)
#define BSD_LABELSECTOR   1
#define BSD_LABELOFFSET   0
#elif defined (__alpha__) || defined (__powerpc__) || defined (__ia64__)
#define BSD_LABELSECTOR   0
#define BSD_LABELOFFSET   64
#else
#error unknown architecture
#endif

#define	BSD_BBSIZE        8192		/* size of boot area, with label */
#define	BSD_SBSIZE        8192		/* max size of fs superblock */

struct xbsd_disklabel {
	__u32	d_magic;		/* the magic number */
	__s16	d_type;			/* drive type */
	__s16	d_subtype;		/* controller/d_type specific */
	char	d_typename[16];		/* type name, e.g. "eagle" */
	char	d_packname[16];			/* pack identifier */ 
			/* disk geometry: */
	__u32	d_secsize;		/* # of bytes per sector */
	__u32	d_nsectors;		/* # of data sectors per track */
	__u32	d_ntracks;		/* # of tracks per cylinder */
	__u32	d_ncylinders;		/* # of data cylinders per unit */
	__u32	d_secpercyl;		/* # of data sectors per cylinder */
	__u32	d_secperunit;		/* # of data sectors per unit */
	/*
	 * Spares (bad sector replacements) below
	 * are not counted in d_nsectors or d_secpercyl.
	 * Spare sectors are assumed to be physical sectors
	 * which occupy space at the end of each track and/or cylinder.
	 */
	__u16	d_sparespertrack;	/* # of spare sectors per track */
	__u16	d_sparespercyl;		/* # of spare sectors per cylinder */
	/*
	 * Alternate cylinders include maintenance, replacement,
	 * configuration description areas, etc.
	 */
	__u32	d_acylinders;		/* # of alt. cylinders per unit */

			/* hardware characteristics: */
	/*
	 * d_interleave, d_trackskew and d_cylskew describe perturbations
	 * in the media format used to compensate for a slow controller.
	 * Interleave is physical sector interleave, set up by the formatter
	 * or controller when formatting.  When interleaving is in use,
	 * logically adjacent sectors are not physically contiguous,
	 * but instead are separated by some number of sectors.
	 * It is specified as the ratio of physical sectors traversed
	 * per logical sector.  Thus an interleave of 1:1 implies contiguous
	 * layout, while 2:1 implies that logical sector 0 is separated
	 * by one sector from logical sector 1.
	 * d_trackskew is the offset of sector 0 on track N
	 * relative to sector 0 on track N-1 on the same cylinder.
	 * Finally, d_cylskew is the offset of sector 0 on cylinder N
	 * relative to sector 0 on cylinder N-1.
	 */
	__u16	d_rpm;			/* rotational speed */
	__u16	d_interleave;		/* hardware sector interleave */
	__u16	d_trackskew;		/* sector 0 skew, per track */
	__u16	d_cylskew;		/* sector 0 skew, per cylinder */
	__u32	d_headswitch;		/* head switch time, usec */
	__u32	d_trkseek;		/* track-to-track seek, usec */
	__u32	d_flags;		/* generic flags */
#define NDDATA 5
	__u32	d_drivedata[NDDATA];	/* drive-type specific information */
#define NSPARE 5
	__u32	d_spare[NSPARE];	/* reserved for future use */
	__u32	d_magic2;		/* the magic number (again) */
	__u16	d_checksum;		/* xor of data incl. partitions */
			/* filesystem and partition information: */
	__u16	d_npartitions;	        /* number of partitions in following */
	__u32	d_bbsize;	        /* size of boot area at sn0, bytes */
	__u32	d_sbsize;	        /* max size of fs superblock, bytes */
	struct xbsd_partition	 {	/* the partition table */
		__u32	p_size;	        /* number of sectors in partition */
		__u32	p_offset;       /* starting sector */
		__u32	p_fsize;        /* filesystem basic fragment size */
		__u8	p_fstype;       /* filesystem type, see below */
		__u8	p_frag;	        /* filesystem fragments per block */
		__u16	p_cpg;	        /* filesystem cylinders per group */
	} d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
};

/* d_type values: */
#define	BSD_DTYPE_SMD		1		/* SMD, XSMD; VAX hp/up */
#define	BSD_DTYPE_MSCP		2		/* MSCP */
#define	BSD_DTYPE_DEC		3		/* other DEC (rk, rl) */
#define	BSD_DTYPE_SCSI		4		/* SCSI */
#define	BSD_DTYPE_ESDI		5		/* ESDI interface */
#define	BSD_DTYPE_ST506		6		/* ST506 etc. */
#define	BSD_DTYPE_HPIB		7		/* CS/80 on HP-IB */
#define BSD_DTYPE_HPFL		8		/* HP Fiber-link */
#define	BSD_DTYPE_FLOPPY	10		/* floppy */

/* d_subtype values: */
#define BSD_DSTYPE_INDOSPART	0x8		/* is inside dos partition */
#define BSD_DSTYPE_DOSPART(s)	((s) & 3)	/* dos partition number */
#define BSD_DSTYPE_GEOMETRY	0x10		/* drive params in label */

#ifdef DKTYPENAMES
static char *xbsd_dktypenames[] = {
	"unknown",
	"SMD",
	"MSCP",
	"old DEC",
	"SCSI",
	"ESDI",
	"ST506",
	"HP-IB",
	"HP-FL",
	"type 9",
	"floppy",
	0
};
#define BSD_DKMAXTYPES	(sizeof(xbsd_dktypenames) / sizeof(xbsd_dktypenames[0]) - 1)
#endif

/*
 * Filesystem type and version.
 * Used to interpret other filesystem-specific
 * per-partition information.
 */
#define	BSD_FS_UNUSED	0		/* unused */
#define	BSD_FS_SWAP    	1		/* swap */
#define	BSD_FS_V6      	2		/* Sixth Edition */
#define	BSD_FS_V7      	3		/* Seventh Edition */
#define	BSD_FS_SYSV    	4		/* System V */
#define	BSD_FS_V71K    	5		/* V7 with 1K blocks (4.1, 2.9) */
#define	BSD_FS_V8      	6		/* Eighth Edition, 4K blocks */
#define	BSD_FS_BSDFFS	7		/* 4.2BSD fast file system */
#define	BSD_FS_BSDLFS	9		/* 4.4BSD log-structured file system */
#define	BSD_FS_OTHER	10		/* in use, but unknown/unsupported */
#define	BSD_FS_HPFS	11		/* OS/2 high-performance file system */
#define	BSD_FS_ISO9660	12		/* ISO-9660 filesystem (cdrom) */
#define BSD_FS_ISOFS	BSD_FS_ISO9660
#define	BSD_FS_BOOT	13		/* partition contains bootstrap */
#define BSD_FS_ADOS	14		/* AmigaDOS fast file system */
#define BSD_FS_HFS	15		/* Macintosh HFS */
#define BSD_FS_ADVFS	16		/* Digital Unix AdvFS */

/* this is annoying, but it's also the way it is :-( */
#ifdef __alpha__
#define	BSD_FS_EXT2	8		/* ext2 file system */
#else
#define	BSD_FS_MSDOS	8		/* MS-DOS file system */
#endif

#ifdef	DKTYPENAMES
static struct systypes xbsd_fstypes[] = {
        {BSD_FS_UNUSED, "unused"},
	{BSD_FS_SWAP,   "swap"},
	{BSD_FS_V6,     "Version 6"},
	{BSD_FS_V7,     "Version 7"},
	{BSD_FS_SYSV,   "System V"},
	{BSD_FS_V71K,   "4.1BSD"},
	{BSD_FS_V8,     "Eighth Edition"},
	{BSD_FS_BSDFFS, "4.2BSD"},
#ifdef __alpha__
	{BSD_FS_EXT2,   "ext2"},
#else
	{BSD_FS_MSDOS,  "MS-DOS"},
#endif
	{BSD_FS_BSDLFS, "4.4LFS"},
	{BSD_FS_OTHER,  "unknown"},
	{BSD_FS_HPFS,   "HPFS"},
	{BSD_FS_ISO9660,"ISO-9660"},
	{BSD_FS_BOOT,   "boot"},
	{BSD_FS_ADOS,   "ADOS"},
	{BSD_FS_HFS,    "HFS"},
	{BSD_FS_ADVFS,	"AdvFS"},
	{ 0, NULL }
};
#define BSD_FSMAXTYPES (SIZE(xbsd_fstypes)-1)

#endif

/*
 * flags shared by various drives:
 */
#define	BSD_D_REMOVABLE	0x01		/* removable media */
#define	BSD_D_ECC      	0x02		/* supports ECC */
#define	BSD_D_BADSECT	0x04		/* supports bad sector forw. */
#define	BSD_D_RAMDISK	0x08		/* disk emulator */
#define	BSD_D_CHAIN    	0x10		/* can do back-back transfers */
#define	BSD_D_DOSPART	0x20		/* within MSDOS partition */
Commit	Line	Data
726f69e2 KZ	1	/*
	2	* Copyright (c) 1987, 1988 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
66ee8158	34	#include <linux/types.h> /* for __u32, __u16, __u8, __s16 */
2b6fc908	35
fd6b7a7f KZ	36	#ifndef BSD_DISKMAGIC /* perhaps from <linux/genhd.h> */
	37	#define BSD_DISKMAGIC ((__u32) 0x82564557)
	38	#endif
	39
	40	#ifndef BSD_MAXPARTITIONS
726f69e2	41	#define BSD_MAXPARTITIONS 8
fd6b7a7f KZ	42	#endif
fd6b7a7f KZ	43
726f69e2 KZ	44	#define BSD_LINUX_BOOTDIR "/usr/ucb/mdec"
726f69e2 KZ	45
22853e4a	46	#if defined (i386) \|\| defined (__sparc__) \|\| defined (__arm__) \|\| defined (__mips__)
726f69e2 KZ	47	#define BSD_LABELSECTOR 1
726f69e2 KZ	48	#define BSD_LABELOFFSET 0
22853e4a	49	#elif defined (__alpha__) \|\| defined (__powerpc__) \|\| defined (__ia64__)
726f69e2	50	#define BSD_LABELSECTOR 0
fd6b7a7f	51	#define BSD_LABELOFFSET 64
726f69e2 KZ	52	#else
	53	#error unknown architecture
	54	#endif
	55
2b6fc908 KZ	56	#define BSD_BBSIZE 8192 /* size of boot area, with label */
	57	#define BSD_SBSIZE 8192 /* max size of fs superblock */
	58
fd6b7a7f KZ	59	struct xbsd_disklabel {
	60	__u32 d_magic; /* the magic number */
	61	__s16 d_type; /* drive type */
	62	__s16 d_subtype; /* controller/d_type specific */
726f69e2	63	char d_typename[16]; /* type name, e.g. "eagle" */
726f69e2	64	char d_packname[16]; /* pack identifier */
726f69e2	65	/* disk geometry: */
fd6b7a7f KZ	66	__u32 d_secsize; /* # of bytes per sector */
	67	__u32 d_nsectors; /* # of data sectors per track */
	68	__u32 d_ntracks; /* # of tracks per cylinder */
	69	__u32 d_ncylinders; /* # of data cylinders per unit */
	70	__u32 d_secpercyl; /* # of data sectors per cylinder */
	71	__u32 d_secperunit; /* # of data sectors per unit */
726f69e2 KZ	72	/*
	73	* Spares (bad sector replacements) below
	74	* are not counted in d_nsectors or d_secpercyl.
	75	* Spare sectors are assumed to be physical sectors
	76	* which occupy space at the end of each track and/or cylinder.
	77	*/
fd6b7a7f KZ	78	__u16 d_sparespertrack; /* # of spare sectors per track */
fd6b7a7f KZ	79	__u16 d_sparespercyl; /* # of spare sectors per cylinder */
726f69e2 KZ	80	/*
	81	* Alternate cylinders include maintenance, replacement,
	82	* configuration description areas, etc.
	83	*/
fd6b7a7f	84	__u32 d_acylinders; /* # of alt. cylinders per unit */
726f69e2 KZ	85
	86	/* hardware characteristics: */
	87	/*
	88	* d_interleave, d_trackskew and d_cylskew describe perturbations
	89	* in the media format used to compensate for a slow controller.
	90	* Interleave is physical sector interleave, set up by the formatter
	91	* or controller when formatting. When interleaving is in use,
	92	* logically adjacent sectors are not physically contiguous,
	93	* but instead are separated by some number of sectors.
	94	* It is specified as the ratio of physical sectors traversed
	95	* per logical sector. Thus an interleave of 1:1 implies contiguous
	96	* layout, while 2:1 implies that logical sector 0 is separated
	97	* by one sector from logical sector 1.
	98	* d_trackskew is the offset of sector 0 on track N
	99	* relative to sector 0 on track N-1 on the same cylinder.
	100	* Finally, d_cylskew is the offset of sector 0 on cylinder N
	101	* relative to sector 0 on cylinder N-1.
	102	*/
fd6b7a7f KZ	103	__u16 d_rpm; /* rotational speed */
	104	__u16 d_interleave; /* hardware sector interleave */
	105	__u16 d_trackskew; /* sector 0 skew, per track */
	106	__u16 d_cylskew; /* sector 0 skew, per cylinder */
	107	__u32 d_headswitch; /* head switch time, usec */
	108	__u32 d_trkseek; /* track-to-track seek, usec */
	109	__u32 d_flags; /* generic flags */
726f69e2	110	#define NDDATA 5
fd6b7a7f	111	__u32 d_drivedata[NDDATA]; /* drive-type specific information */
726f69e2	112	#define NSPARE 5
fd6b7a7f KZ	113	__u32 d_spare[NSPARE]; /* reserved for future use */
	114	__u32 d_magic2; /* the magic number (again) */
	115	__u16 d_checksum; /* xor of data incl. partitions */
726f69e2	116	/* filesystem and partition information: */
fd6b7a7f KZ	117	__u16 d_npartitions; /* number of partitions in following */
	118	__u32 d_bbsize; /* size of boot area at sn0, bytes */
	119	__u32 d_sbsize; /* max size of fs superblock, bytes */
	120	struct xbsd_partition { /* the partition table */
	121	__u32 p_size; /* number of sectors in partition */
	122	__u32 p_offset; /* starting sector */
	123	__u32 p_fsize; /* filesystem basic fragment size */
	124	__u8 p_fstype; /* filesystem type, see below */
	125	__u8 p_frag; /* filesystem fragments per block */
	126	__u16 p_cpg; /* filesystem cylinders per group */
726f69e2 KZ	127	} d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
	128	};
	129
	130	/* d_type values: */
	131	#define BSD_DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */
	132	#define BSD_DTYPE_MSCP 2 /* MSCP */
	133	#define BSD_DTYPE_DEC 3 /* other DEC (rk, rl) */
	134	#define BSD_DTYPE_SCSI 4 /* SCSI */
	135	#define BSD_DTYPE_ESDI 5 /* ESDI interface */
	136	#define BSD_DTYPE_ST506 6 /* ST506 etc. */
	137	#define BSD_DTYPE_HPIB 7 /* CS/80 on HP-IB */
	138	#define BSD_DTYPE_HPFL 8 /* HP Fiber-link */
	139	#define BSD_DTYPE_FLOPPY 10 /* floppy */
	140
	141	/* d_subtype values: */
	142	#define BSD_DSTYPE_INDOSPART 0x8 /* is inside dos partition */
	143	#define BSD_DSTYPE_DOSPART(s) ((s) & 3) /* dos partition number */
	144	#define BSD_DSTYPE_GEOMETRY 0x10 /* drive params in label */
	145
	146	#ifdef DKTYPENAMES
fd6b7a7f	147	static char *xbsd_dktypenames[] = {
726f69e2 KZ	148	"unknown",
	149	"SMD",
	150	"MSCP",
	151	"old DEC",
	152	"SCSI",
	153	"ESDI",
	154	"ST506",
	155	"HP-IB",
	156	"HP-FL",
	157	"type 9",
	158	"floppy",
	159	0
	160	};
fd6b7a7f	161	#define BSD_DKMAXTYPES (sizeof(xbsd_dktypenames) / sizeof(xbsd_dktypenames[0]) - 1)
726f69e2 KZ	162	#endif
	163
	164	/*
	165	* Filesystem type and version.
	166	* Used to interpret other filesystem-specific
	167	* per-partition information.
	168	*/
	169	#define BSD_FS_UNUSED 0 /* unused */
	170	#define BSD_FS_SWAP 1 /* swap */
	171	#define BSD_FS_V6 2 /* Sixth Edition */
	172	#define BSD_FS_V7 3 /* Seventh Edition */
	173	#define BSD_FS_SYSV 4 /* System V */
	174	#define BSD_FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
	175	#define BSD_FS_V8 6 /* Eighth Edition, 4K blocks */
	176	#define BSD_FS_BSDFFS 7 /* 4.2BSD fast file system */
726f69e2 KZ	177	#define BSD_FS_BSDLFS 9 /* 4.4BSD log-structured file system */
	178	#define BSD_FS_OTHER 10 /* in use, but unknown/unsupported */
	179	#define BSD_FS_HPFS 11 /* OS/2 high-performance file system */
	180	#define BSD_FS_ISO9660 12 /* ISO-9660 filesystem (cdrom) */
	181	#define BSD_FS_ISOFS BSD_FS_ISO9660
	182	#define BSD_FS_BOOT 13 /* partition contains bootstrap */
	183	#define BSD_FS_ADOS 14 /* AmigaDOS fast file system */
	184	#define BSD_FS_HFS 15 /* Macintosh HFS */
22853e4a	185	#define BSD_FS_ADVFS 16 /* Digital Unix AdvFS */
726f69e2	186
fd6b7a7f KZ	187	/* this is annoying, but it's also the way it is :-( */
fd6b7a7f KZ	188	#ifdef __alpha__
22853e4a	189	#define BSD_FS_EXT2 8 /* ext2 file system */
fd6b7a7f KZ	190	#else
	191	#define BSD_FS_MSDOS 8 /* MS-DOS file system */
	192	#endif
	193
726f69e2	194	#ifdef DKTYPENAMES
fd6b7a7f	195	static struct systypes xbsd_fstypes[] = {
726f69e2 KZ	196	{BSD_FS_UNUSED, "unused"},
	197	{BSD_FS_SWAP, "swap"},
	198	{BSD_FS_V6, "Version 6"},
	199	{BSD_FS_V7, "Version 7"},
	200	{BSD_FS_SYSV, "System V"},
	201	{BSD_FS_V71K, "4.1BSD"},
	202	{BSD_FS_V8, "Eighth Edition"},
	203	{BSD_FS_BSDFFS, "4.2BSD"},
fd6b7a7f KZ	204	#ifdef __alpha__
	205	{BSD_FS_EXT2, "ext2"},
	206	#else
726f69e2	207	{BSD_FS_MSDOS, "MS-DOS"},
fd6b7a7f	208	#endif
726f69e2 KZ	209	{BSD_FS_BSDLFS, "4.4LFS"},
	210	{BSD_FS_OTHER, "unknown"},
	211	{BSD_FS_HPFS, "HPFS"},
	212	{BSD_FS_ISO9660,"ISO-9660"},
	213	{BSD_FS_BOOT, "boot"},
	214	{BSD_FS_ADOS, "ADOS"},
2b6fc908	215	{BSD_FS_HFS, "HFS"},
22853e4a	216	{BSD_FS_ADVFS, "AdvFS"},
2b6fc908	217	{ 0, NULL }
726f69e2	218	};
2b6fc908	219	#define BSD_FSMAXTYPES (SIZE(xbsd_fstypes)-1)
726f69e2	220
726f69e2 KZ	221	#endif
	222
	223	/*
	224	* flags shared by various drives:
	225	*/
	226	#define BSD_D_REMOVABLE 0x01 /* removable media */
	227	#define BSD_D_ECC 0x02 /* supports ECC */
	228	#define BSD_D_BADSECT 0x04 /* supports bad sector forw. */
	229	#define BSD_D_RAMDISK 0x08 /* disk emulator */
	230	#define BSD_D_CHAIN 0x10 /* can do back-back transfers */
	231	#define BSD_D_DOSPART 0x20 /* within MSDOS partition */