]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Examine.c
2 * mdctl - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001 Neil Brown <neilb@cse.unsw.edu.au>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * Email: <neilb@cse.unsw.edu.au>
24 * School of Computer Science and Engineering
25 * The University of New South Wales
32 #if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN)
33 #error no endian defined
37 int Examine(char *dev
)
40 /* Read the raid superblock from a device and
41 * display important content.
43 * If cannot be found, print reason: too small, bad magic
46 * version, ctime, level, size, raid+spare+
53 int fd
= open(dev
, O_RDONLY
);
61 fprintf(stderr
,Name
": cannot open %s: %s\n",
62 dev
, strerror(errno
));
66 rv
= load_super(fd
, &super
);
70 fprintf(stderr
, Name
": cannot find device size for %s: %s\n",
71 dev
, strerror(errno
));
74 /* fprintf(stderr, Name ": %s is too small for md: size is %ld sectors\n",
77 fprintf(stderr
, Name
": %s is too small for md\n",
81 fprintf(stderr
, Name
": Cannot seek to superblock on %s: %s\n",
82 dev
, strerror(errno
));
85 fprintf(stderr
, Name
": Cannot read superblock on %s\n",
89 fprintf(stderr
, Name
": No super block found on %s (Expected magic %08x, got %08x)\n",
90 dev
, MD_SB_MAGIC
, super
.md_magic
);
93 fprintf(stderr
, Name
": Cannot interpret superblock on %s - version is %d\n",
94 dev
, super
.major_version
);
98 /* Ok, its good enough to try, though the checksum could be wrong */
100 printf(" Magic : %08x\n", super
.md_magic
);
101 printf(" Version : %02d.%02d.%02d\n", super
.major_version
, super
.minor_version
,
102 super
.patch_version
);
103 if (super
.minor_version
>= 90)
104 printf(" UUID : %08x:%08x:%08x:%08x\n", super
.set_uuid0
, super
.set_uuid1
,
105 super
.set_uuid2
, super
.set_uuid3
);
107 printf(" UUID : %08x\n", super
.set_uuid0
);
110 printf(" Creation Time : %.24s\n", ctime(&atime
));
111 c
=map_num(pers
, super
.level
);
112 printf(" Raid Level : %s\n", c
?c
:"-unknown-");
113 printf(" Size : %d\n", super
.size
);
114 printf(" Raid Disks : %d\n", super
.raid_disks
);
115 printf(" Total Disks : %d\n", super
.nr_disks
);
116 printf("Preferred Minor : %d\n", super
.md_minor
);
119 printf(" Update Time : %.24s\n", ctime(&atime
));
120 printf(" State : %s, %serrors\n",
121 (super
.state
&(1<<MD_SB_CLEAN
))?"clean":"dirty",
122 (super
.state
&(1<<MD_SB_ERRORS
))?"":"no-");
123 printf(" Active Drives : %d\n", super
.active_disks
);
124 printf(" Working Drives : %d\n", super
.working_disks
);
125 printf(" Failed Drives : %d\n", super
.failed_disks
);
126 printf(" Spare Drives : %d\n", super
.spare_disks
);
127 if (calc_sb_csum(&super
) == super
.sb_csum
)
128 printf(" Checksum : %x - correct\n", super
.sb_csum
);
130 printf(" Checksum : %x - expected %x\n", super
.sb_csum
, calc_sb_csum(&super
));
131 printf(" Events : %d.%d\n", super
.events_hi
, super
.events_lo
);
133 if (super
.level
== 5) {
134 c
= map_num(r5layout
, super
.layout
);
135 printf(" Layout : %s\n", c
?c
:"-unknown-");
137 switch(super
.level
) {
141 printf(" Chunk Size : %dK\n", super
.chunk_size
/1024);
144 printf(" Rounding : %dK\n", super
.chunk_size
/1024);
149 printf(" Number Major Minor RaidDisk State\n");
150 for (d
= -1; d
<(signed int)super
.nr_disks
; d
++) {
154 if (d
>=0) dp
= &super
.disks
[d
];
155 else dp
= &super
.this_disk
;
156 sprintf(nb
, "%4d", d
);
157 printf("%4s %5d %5d %5d %5d ", d
< 0 ? "this" : nb
,
158 dp
->number
, dp
->major
, dp
->minor
, dp
->raid_disk
);
159 if (dp
->state
& (1<<MD_DISK_FAULTY
)) printf(" faulty");
160 if (dp
->state
& (1<<MD_DISK_ACTIVE
)) printf(" active");
161 if (dp
->state
& (1<<MD_DISK_SYNC
)) printf(" sync");
162 if (dp
->state
& (1<<MD_DISK_REMOVED
)) printf(" removed");
163 if ((dv
=map_dev(dp
->major
, dp
->minor
)))