Hi Neil,
Please check the followings.
What kernel are you running?
linux48:~ # uname -r
3.12.32-33-default
And 3.12.28-4-default kernel is ok.
Please use "strace" on mdadm in a case where it fails, and post the result.
linux48:~ # strace mdadm --grow --bitmap=none /dev/md127
execve("/sbin/mdadm", ["mdadm", "--grow", "--bitmap=none",
"/dev/md127"], [/* 58 vars */]) = 0
brk(0) = 0xfe8000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x7fcab07ad000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=93919, ...}) = 0
mmap(NULL, 93919, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fcab0796000
close(3) = 0
open("/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\34\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1978611, ...}) = 0
mmap(NULL, 3832352, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x7fcab01e6000
mprotect(0x7fcab0384000, 2097152, PROT_NONE) = 0
mmap(0x7fcab0584000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19e000) = 0x7fcab0584000
mmap(0x7fcab058a000, 14880, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fcab058a000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x7fcab0795000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x7fcab0794000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x7fcab0793000
arch_prctl(ARCH_SET_FS, 0x7fcab0794700) = 0
mprotect(0x7fcab0584000, 16384, PROT_READ) = 0
mprotect(0x677000, 4096, PROT_READ) = 0
mprotect(0x7fcab07ae000, 4096, PROT_READ) = 0
munmap(0x7fcab0796000, 93919) = 0
getpid() = 6000
brk(0) = 0xfe8000
brk(0x1009000) = 0x1009000
open("/dev/md127", O_RDWR) = 3
fstat(3, {st_mode=S_IFBLK|0660, st_rdev=makedev(9, 127), ...}) = 0
ioctl(3, RAID_VERSION, 0x7fff2e10d160) = 0
open("/etc/mdadm.conf", O_RDONLY) = -1 ENOENT (No such file or
directory)
open("/etc/mdadm/mdadm.conf", O_RDONLY) = -1 ENOENT (No such file or
directory)
open("/etc/mdadm.conf.d", O_RDONLY) = -1 ENOENT (No such file or
directory)
uname({sys="Linux", node="linux48", ...}) = 0
geteuid() = 0
fstat(3, {st_mode=S_IFBLK|0660, st_rdev=makedev(9, 127), ...}) = 0
ioctl(3, RAID_VERSION, 0x7fff2e10c060) = 0
ioctl(3, GET_BITMAP_FILE, 0x7fff2e10c1f0) = 0
ioctl(3, GET_ARRAY_INFO, 0x7fff2e10c1a0) = 0
ioctl(3, SET_ARRAY_INFO, 0x7fff2e10c1a0) = -1 EINVAL (Invalid argument)
write(2, "mdadm: failed to remove internal"..., 41mdadm: failed to
remove internal bitmap.
) = 41
exit_group(1) = ?
+++ exited with 1 +++
Thanks,
gary
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