2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2002-2009 Neil Brown <neilb@suse.de>
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@suse.de>
31 /* Give a brief description of the device,
32 * whether it is an md device and whether it has
35 int fd = open(dev, O_RDONLY);
40 mdu_array_info_t array;
41 struct supertype *st = NULL;
43 unsigned long long larray_size;
50 pr_err("cannot open %s: %s\n",
51 dev, strerror(errno));
55 vers = md_get_version(fd);
56 if (ioctl(fd, GET_ARRAY_INFO, &array)<0)
62 if (vers>=9000 && !ioctlerr) {
63 if (!get_dev_size(fd, NULL, &larray_size))
68 printf("%s: is not an md array\n", dev);
70 printf("%s: is an md device, but kernel cannot provide details\n", dev);
71 else if (ioctlerr == ENODEV)
72 printf("%s: is an md device which is not active\n", dev);
74 printf("%s: is an md device, but gives \"%s\" when queried\n",
75 dev, strerror(ioctlerr));
77 printf("%s: %s %s %d devices, %d spare%s. Use mdadm --detail for more detail.\n",
79 human_size_brief(larray_size,IEC),
80 map_num(pers, array.level),
82 array.spare_disks, array.spare_disks==1?"":"s");
85 if (st && st->ss->compare_super != NULL)
86 superror = st->ss->load_super(st, fd, dev);
91 /* array might be active... */
93 struct map_ent *me, *map = NULL;
94 st->ss->getinfo_super(st, &info, NULL);
95 st->ss->uuid_from_super(st, uuid);
96 me = map_by_uuid(&map, uuid);
99 disc.number = info.disk.number;
100 activity = "undetected";
101 if (mddev && (fd = open(mddev, O_RDONLY))>=0) {
102 if (md_get_version(fd) >= 9000 &&
103 ioctl(fd, GET_ARRAY_INFO, &array)>= 0) {
104 if (ioctl(fd, GET_DISK_INFO, &disc) >= 0 &&
105 makedev((unsigned)disc.major,(unsigned)disc.minor) == stb.st_rdev)
108 activity = "mismatch";
113 activity = "inactive";
116 printf("%s: device %d in %d device %s %s %s. Use mdadm --examine for more detail.\n",
118 info.disk.number, info.array.raid_disks,
120 map_num(pers, info.array.level),
122 if (st->ss == &super0)