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From: Brian J. Murrell
Date: Tue Aug 07 2007 - 12:55:01 EST

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I am using Ubuntu Gutsy, which is the in-development branch heading for
their next stable release.

I have noticed that since some kernel release post-2.6.20 I have been
unable to mount my /boot partition:

$ sudo strace -f mount /dev/hda1 /mnt/foo
execve("/bin/mount", ["mount", "/dev/hda1", "/mnt/foo"], [/* 41 vars*/])= 0
brk(0) = 0x8062000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fbc000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=91976, ...}) = 0
mmap2(NULL, 91976, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7fa5000
close(4) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/tls/i686/cmov/libc.so.6", O_RDONLY) = 4
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\260a\1"..., 512) = 512
fstat64(4, {st_mode=S_IFREG|0644, st_size=1339816, ...}) = 0
mmap2(NULL, 1349136, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0xb7e5b000
mmap2(0xb7f9f000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x143) = 0xb7f9f000
mmap2(0xb7fa2000, 9744, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb7fa2000
close(4) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7e5a000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7e5a6b0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0xb7f9f000, 4096, PROT_READ) = 0
munmap(0xb7fa5000, 91976) = 0
brk(0) = 0x8062000
brk(0x8083000) = 0x8083000
open("/usr/lib/locale/locale-archive", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/locale.alias", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=2586, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fbb000
read(4, "# Locale name alias data base.\n#"..., 1024) = 1024
read(4, "ies are case independent.\n\n# Not"..., 1024) = 1024
read(4, ".euc \tko_KR.eucKR\nko_KR\t\tko_KR.e"..., 1024) = 538
read(4, "", 1024) = 0
close(4) = 0
munmap(0xb7fbb000, 4096) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_IDENTIFICATION", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_IDENTIFICATION", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=363, ...}) = 0
mmap2(NULL, 363, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7fbb000
close(4) = 0
open("/usr/lib/gconv/gconv-modules.cache", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=25486, ...}) = 0
mmap2(NULL, 25486, PROT_READ, MAP_SHARED, 4, 0) = 0xb7fb4000
close(4) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_MEASUREMENT", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_MEASUREMENT", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=23, ...}) = 0
mmap2(NULL, 23, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7fb3000
close(4) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_TELEPHONE", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_TELEPHONE", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=51, ...}) = 0
mmap2(NULL, 51, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7fb2000
close(4) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_ADDRESS", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_ADDRESS", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=127, ...}) = 0
mmap2(NULL, 127, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7fb1000
close(4) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_NAME", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_NAME", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=62, ...}) = 0
mmap2(NULL, 62, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7fb0000
close(4) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_PAPER", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_PAPER", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=34, ...}) = 0
mmap2(NULL, 34, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7faf000
close(4) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_MESSAGES", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_MESSAGES", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
close(4) = 0
open("/usr/lib/locale/en_CA.utf8/LC_MESSAGES/SYS_LC_MESSAGES", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=54, ...}) = 0
mmap2(NULL, 54, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7fae000
close(4) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_MONETARY", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_MONETARY", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=286, ...}) = 0
mmap2(NULL, 286, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7fad000
close(4) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_COLLATE", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_COLLATE", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=880094, ...}) = 0
mmap2(NULL, 880094, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7d83000
close(4) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_TIME", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_TIME", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=2451, ...}) = 0
mmap2(NULL, 2451, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7fac000
close(4) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_NUMERIC", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_NUMERIC", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=54, ...}) = 0
mmap2(NULL, 54, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7fab000
close(4) = 0
open("/usr/lib/locale/en_CA.UTF-8/LC_CTYPE", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/en_CA.utf8/LC_CTYPE", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=238336, ...}) = 0
mmap2(NULL, 238336, PROT_READ, MAP_PRIVATE, 4, 0) = 0xb7d48000
close(4) = 0
umask(022) = 022
open("/dev/null", O_RDWR|O_LARGEFILE) = 4
close(4) = 0
getuid32() = 0
geteuid32() = 0
lstat64("/etc/mtab", {st_mode=S_IFREG|0644, st_size=1136, ...}) = 0
stat64("/dev/hda1", {st_mode=S_IFBLK|0660, st_rdev=makedev(3, 1), ...}) = 0
rt_sigprocmask(SIG_BLOCK, ~[TRAP SEGV RTMIN RT_1], NULL, 8) = 0
open("/dev/hda1", O_RDONLY|O_LARGEFILE) = 4
ioctl(4, BLKGETSIZE64, 0xbf80f540) = 0
_llseek(4, 41025536, [41025536], SEEK_SET) = 0
read(4, "#=\353\177\374A\305\366d\332&\230\373\222\\\353\3331\r"..., 2048) = 2048
brk(0x80aa000) = 0x80aa000
_llseek(4, 0, [0], SEEK_SET) = 0
read(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 2048) = 2048
_llseek(4, 0, [0], SEEK_SET) = 0
read(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 6144) = 6144
_llseek(4, 41093632, [41093632], SEEK_SET) = 0
read(4, "e\262\321\332\273j\242\335\317*\nlb\237T\237\212\236\247"..., 512) = 512
_llseek(4, 41093120, [41093120], SEEK_SET) = 0
read(4, ">\270\20XK\177\307\233\334j\315\357ac\235\360\225\276\234"..., 512) = 512
_llseek(4, 41093632, [41093632], SEEK_SET) = 0
read(4, "e\262\321\332\273j\242\335\317*\nlb\237T\237\212\236\247"..., 512) = 512
_llseek(4, 41093120, [41093120], SEEK_SET) = 0
read(4, ">\270\20XK\177\307\233\334j\315\357ac\235\360\225\276\234"..., 512) = 512
_llseek(4, 41061888, [41061888], SEEK_SET) = 0
read(4, "\327\312Z\320s/\201\322\241\274\216\374*\263\1\7\\\220"..., 512) = 512
_llseek(4, 40963584, [40963584], SEEK_SET) = 0
read(4, "ODUX\237\253{I\24\216\372\204\213\3525\316\20\341\274\327"..., 512) = 512
_llseek(4, 40963072, [40963072], SEEK_SET) = 0
read(4, ":<\217\6\371F\16M\267f\260\265?uH\3656gNJ\v\30\253\350"..., 512) = 512
_llseek(4, 41085952, [41085952], SEEK_SET) = 0
read(4, "~\360\373F>\247\346bp\266gA\231\373\24\v0\307\37\222G$"..., 512) = 512
_llseek(4, 40889856, [40889856], SEEK_SET) = 0
read(4, "KD\276\330\26\36\266U\373\332\255=\3440\22c\323\276\266"..., 512) = 512
_llseek(4, 41088512, [41088512], SEEK_SET) = 0
read(4, "o\331\251yn\365\25669S!} \1\303\334\31\264K\27A)p\341s"..., 512) = 512
_llseek(4, 41093632, [41093632], SEEK_SET) = 0
read(4, "e\262\321\332\273j\242\335\317*\nlb\237T\237\212\236\247"..., 512) = 512
_llseek(4, 0, [0], SEEK_SET) = 0
read(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 8192) = 8192
_llseek(4, 0, [0], SEEK_SET) = 0
read(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16384) = 16384
brk(0x8099000) = 0x8099000
brk(0x8089000) = 0x8089000
close(4) = 0
stat64("/sbin/mount.ext3", 0xbf80f484) = -1 ENOENT (No such file or directory)
mount("/dev/hda1", "/mnt/foo", "ext3", MS_MGC_VAL, NULL) = -1 EBUSY (Device or resource busy)
rt_sigprocmask(SIG_UNBLOCK, ~[TRAP SEGV RTMIN RT_1], NULL, 8) = 0
write(2, "mount: /dev/hda1 already mounted"..., 50mount: /dev/hda1 already mounted or /mnt/foo busy) = 50
umask(077) = 022
open("/etc/mtab", O_RDONLY|O_LARGEFILE) = 4
umask(022) = 077
fstat64(4, {st_mode=S_IFREG|0644, st_size=1136, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7d47000
read(4, "/dev/dm-20 / ext3 rw,errors=remo"..., 1024) = 1024
read(4, "ib/nfs/rpc_pipefs rpc_pipefs rw "..., 1024) = 112
read(4, "", 1024) = 0
close(4) = 0
munmap(0xb7d47000, 4096) = 0
exit_group(32) = ?
Process 27016 detached

All other block devices (all LVM LVs) seem to mount with no problems.

Certainly I leave open the possibility of pilot error (by either me or
Ubuntu) but I don't know how to even see why/where/what could be going
wrong.

/proc/mounts does not show the device mounted:

$ grep hda /proc/mounts
$

and fuser and lsof doesn't show anything using the mount point:

$ fuser /mnt/foo
$ sudo lsof | grep /mnt/foo
$

Nor does lsof show /dev/hda (device 3,1) in use:

$ sudo lsof | grep -e hda -e 3,1
$

So I'm kind of perplexed as to what to try next in how to debug
this?

Any ideas? Thanx in advance.

b.

--
A day in the yard with my son is just like a day at work. He goes
hunting around for stuff and brings it back to me and says: "Hey Dad,
look what I found. The money is for me and the screw is for you."

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