Neil -
You are the man; the array went w/o force - and is rebuilding now!
-(root@abyss)-(/)- # mdadm --detail /dev/md0
/dev/md0:
Version : 01.00.01
Creation Time : Wed Dec 31 19:00:00 1969
Raid Level : raid5
Array Size : 1935556992 (1845.89 GiB 1982.01 GB)
Device Size : 71687296 (68.37 GiB 73.41 GB)
Raid Devices : 28
Total Devices : 28
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Thu Jul 14 22:07:18 2005
State : active, resyncing
Active Devices : 28
Working Devices : 28
Failed Devices : 0
Spare Devices : 0
Layout : left-asymmetric
Chunk Size : 128K
Rebuild Status : 0% complete
UUID : 4e2b6b0a8e:92e91c0c:018a4bf0:9bb74d
Events : 172760
Number Major Minor RaidDevice State
0 8 0 0 active sync /dev/evms/.nodes/sda
1 8 16 1 active sync /dev/evms/.nodes/sdb
2 8 32 2 active sync /dev/evms/.nodes/sdc
3 8 48 3 active sync /dev/evms/.nodes/sdd
4 8 64 4 active sync /dev/evms/.nodes/sde
5 8 80 5 active sync /dev/evms/.nodes/sdf
6 8 96 6 active sync /dev/evms/.nodes/sdg
7 8 112 7 active sync /dev/evms/.nodes/sdh
8 8 128 8 active sync /dev/evms/.nodes/sdi
9 8 144 9 active sync /dev/evms/.nodes/sdj
10 8 160 10 active sync /dev/evms/.nodes/sdk
11 8 176 11 active sync /dev/evms/.nodes/sdl
12 8 192 12 active sync /dev/evms/.nodes/sdm
13 8 208 13 active sync /dev/evms/.nodes/sdn
14 8 224 14 active sync /dev/evms/.nodes/sdo
15 8 240 15 active sync /dev/evms/.nodes/sdp
16 65 0 16 active sync /dev/evms/.nodes/sdq
17 65 16 17 active sync /dev/evms/.nodes/sdr
18 65 32 18 active sync /dev/evms/.nodes/sds
19 65 48 19 active sync /dev/evms/.nodes/sdt
20 65 64 20 active sync /dev/evms/.nodes/sdu
21 65 80 21 active sync /dev/evms/.nodes/sdv
22 65 96 22 active sync /dev/evms/.nodes/sdw
23 65 112 23 active sync /dev/evms/.nodes/sdx
24 65 128 24 active sync /dev/evms/.nodes/sdy
25 65 144 25 active sync /dev/evms/.nodes/sdz
26 65 160 26 active sync /dev/evms/.nodes/sdaa
27 65 176 27 active sync /dev/evms/.nodes/sdab
-- David M. Strang
----- Original Message -----
From: Neil Brown
To: David M. Strang
Cc: linux-raid@xxxxxxxxxxxxxxx
Sent: Thursday, July 14, 2005 9:43 PM
Subject: Re: Raid5 Failure
On Thursday July 14, dstrang@xxxxxxxxxxxxxx wrote:
It looks like the first 'segment of discs' sda->sdm are all marked clean;
while sdn->sdab are marked active.
What can I do to resolve this issue? Any assistance would be greatly
appreciated.
Apply the following patch to mdadm-2.0-devel2 (it fixes a few bugs and
particularly make --assemble work) then try:
mdadm -A /dev/md0 /dev/sd[a-z] /dev/sd....
Just list all 28 SCSI devices, I'm not sure what their names are.
This will quite probably fail.
If it does, try again with
--force
NeilBrown
Signed-off-by: Neil Brown <neilb@xxxxxxxxxxxxxxx>
### Diffstat output
./Assemble.c | 13 ++++++++++++-
./Query.c | 33 +++++++++++++++++++--------------
./mdadm.h | 2 +-
./super0.c | 1 +
./super1.c | 4 ++--
5 files changed, 35 insertions(+), 18 deletions(-)
diff ./Assemble.c~current~ ./Assemble.c
--- ./Assemble.c~current~ 2005-07-15 10:13:04.000000000 +1000
+++ ./Assemble.c 2005-07-15 10:37:59.000000000 +1000
@@ -473,6 +473,7 @@ int Assemble(struct supertype *st, char
if (!devices[j].uptodate)
continue;
info.disk.number = i;
+ info.disk.raid_disk = i;
info.disk.state = desired_state;
if (devices[j].uptodate &&
@@ -526,7 +527,17 @@ int Assemble(struct supertype *st, char
/* Almost ready to actually *do* something */
if (!old_linux) {
- if (ioctl(mdfd, SET_ARRAY_INFO, NULL) != 0) {
+ int rv;
+ if ((vers % 100) >= 1) { /* can use different versions */
+ mdu_array_info_t inf;
+ memset(&inf, 0, sizeof(inf));
+ inf.major_version = st->ss->major;
+ inf.minor_version = st->minor_version;
+ rv = ioctl(mdfd, SET_ARRAY_INFO, &inf);
+ } else
+ rv = ioctl(mdfd, SET_ARRAY_INFO, NULL);
+
+ if (rv) {
fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
mddev, strerror(errno));
return 1;
diff ./Query.c~current~ ./Query.c
--- ./Query.c~current~ 2005-07-07 09:19:53.000000000 +1000
+++ ./Query.c 2005-07-15 11:38:18.000000000 +1000
@@ -105,26 +105,31 @@ int Query(char *dev)
if (superror == 0) {
/* array might be active... */
st->ss->getinfo_super(&info, super);
- mddev = get_md_name(info.array.md_minor);
- disc.number = info.disk.number;
- activity = "undetected";
- if (mddev && (fd = open(mddev, O_RDONLY))>=0) {
- if (md_get_version(fd) >= 9000 &&
- ioctl(fd, GET_ARRAY_INFO, &array)>= 0) {
- if (ioctl(fd, GET_DISK_INFO, &disc) >= 0 &&
- makedev((unsigned)disc.major,(unsigned)disc.minor) == stb.st_rdev)
- activity = "active";
- else
- activity = "mismatch";
+ if (st->ss->major == 0) {
+ mddev = get_md_name(info.array.md_minor);
+ disc.number = info.disk.number;
+ activity = "undetected";
+ if (mddev && (fd = open(mddev, O_RDONLY))>=0) {
+ if (md_get_version(fd) >= 9000 &&
+ ioctl(fd, GET_ARRAY_INFO, &array)>= 0) {
+ if (ioctl(fd, GET_DISK_INFO, &disc) >= 0 &&
+ makedev((unsigned)disc.major,(unsigned)disc.minor) == stb.st_rdev)
+ activity = "active";
+ else
+ activity = "mismatch";
+ }
+ close(fd);
}
- close(fd);
+ } else {
+ activity = "unknown";
+ mddev = "array";
}
- printf("%s: device %d in %d device %s %s md%d. Use mdadm --examine for
more detail.\n",
+ printf("%s: device %d in %d device %s %s %s. Use mdadm --examine for more
detail.\n",
dev,
info.disk.number, info.array.raid_disks,
activity,
map_num(pers, info.array.level),
- info.array.md_minor);
+ mddev);
}
return 0;
}
diff ./mdadm.h~current~ ./mdadm.h
--- ./mdadm.h~current~ 2005-07-07 09:19:53.000000000 +1000
+++ ./mdadm.h 2005-07-15 10:15:51.000000000 +1000
@@ -73,7 +73,7 @@ struct mdinfo {
mdu_array_info_t array;
mdu_disk_info_t disk;
__u64 events;
- unsigned int uuid[4];
+ int uuid[4];
};
#define Name "mdadm"
diff ./super0.c~current~ ./super0.c
--- ./super0.c~current~ 2005-07-07 09:19:53.000000000 +1000
+++ ./super0.c 2005-07-15 11:27:12.000000000 +1000
@@ -205,6 +205,7 @@ static void getinfo_super0(struct mdinfo
info->disk.major = sb->this_disk.major;
info->disk.minor = sb->this_disk.minor;
info->disk.raid_disk = sb->this_disk.raid_disk;
+ info->disk.number = sb->this_disk.number;
info->events = md_event(sb);
diff ./super1.c~current~ ./super1.c
--- ./super1.c~current~ 2005-07-07 09:19:53.000000000 +1000
+++ ./super1.c 2005-07-15 11:25:04.000000000 +1000
@@ -278,7 +278,7 @@ static void getinfo_super1(struct mdinfo
info->disk.major = 0;
info->disk.minor = 0;
-
+ info->disk.number = __le32_to_cpu(sb->dev_number);
if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) ||
__le32_to_cpu(sb->max_dev) > 512)
role = 0xfffe;
@@ -303,7 +303,7 @@ static void getinfo_super1(struct mdinfo
for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
role = __le16_to_cpu(sb->dev_roles[i]);
- if (role == 0xFFFF || role < info->array.raid_disks)
+ if (/*role == 0xFFFF || */role < info->array.raid_disks)
working++;
}
-
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