Additional to my previous informations.
# egrep -v '^#|^$' /etc/fstab
proc /proc
proc defaults
0 0
/dev/mapper/movax2_vg-movax2_lv_root / ext3
noatime,errors=remount-ro 0 1
LABEL=MOVAX-DEV-BOOT
/boot ext3 nosuid,nodev,relatime
0 2
/dev/mapper/movax2_vg-movax2_lv_home /home_local
reiserfs nosuid,nodev,noatime,acl,user_xattr 0 2
/dev/mapper/movax2_vg-movax2_lv_tmp /tmp ext3
nosuid,nodev,noatime 0
2
/dev/mapper/movax2_vg-movax2_lv_usr /usr
reiserfs noatime
0 2
/dev/mapper/movax2_vg-movax2_lv_var /var
reiserfs noatime
0 2
/dev/mapper/movax2_vg-movax2_lv_swap none swap
sw,pri=1
0 0
LABEL=WB_ZEW_SWAP none
swap sw,pri=1
0 0
/dev/ramzswap0 none
swap sw,pri=100
0 0
/dev/cdrom3
/media/cdrom0 udf,iso9660 user,noauto
0 0
/dev/scd0
/media/cdrom2 udf,iso9660 user,noauto
0 0
nodev /debug debugfs defaults 0 0
#
# cat /etc/mtab
/dev/mapper/movax2_vg-movax2_lv_root / ext3 rw 0 0
tmpfs /lib/init/rw tmpfs rw,nosuid,mode=0755 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
sysfs /sys sysfs rw,noexec,nosuid,nodev 0 0
udev /dev tmpfs rw,mode=0755 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev,size=600m 0 0
devpts /dev/pts devpts rw,noexec,nosuid,gid=5,mode=620 0 0
fusectl /sys/fs/fuse/connections fusectl rw 0 0
/dev/mapper/movax2_vg-movax2_lv_home /home_local reiserfs
rw,nosuid,nodev,noatime,acl,user_xattr 0 0
/dev/mapper/movax2_vg-movax2_lv_tmp /tmp ext3 rw,nosuid,nodev,noatime 0 0
/dev/mapper/movax2_vg-movax2_lv_usr /usr reiserfs rw,noatime 0 0
/dev/mapper/movax2_vg-movax2_lv_var /var reiserfs rw,noatime 0 0
nodev /debug debugfs rw 0 0
wbzewzfs/Backup /wbzewzfs/Backup fuse rw,allow_other 0 0
wbzewzfs/Books /wbzewzfs/Books fuse rw,allow_other 0 0
wbzewzfs/Download /wbzewzfs/Download fuse rw,allow_other 0 0
wbzewzfs/Download2 /wbzewzfs/Download2 fuse rw,allow_other 0 0
wbzewzfs/Films /wbzewzfs/Films fuse rw,allow_other 0 0
wbzewzfs/ISO /wbzewzfs/ISO fuse rw,allow_other 0 0
wbzewzfs/Music /wbzewzfs/Music fuse rw,allow_other 0 0
wbzewzfs/Photos /wbzewzfs/Photos fuse rw,allow_other 0 0
rpc_pipefs /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0
automount(pid2182) /home autofs rw,fd=4,pgrp=2182,minproto=2,maxproto=4 0 0
nfsd /proc/fs/nfsd nfsd rw 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,noexec,nosuid,nodev 0 0
automount(pid31443) /scratch-remote autofs
rw,fd=5,pgrp=31443,minproto=2,maxproto=4 0 0
automount(pid31497) /cdrom-remote autofs
rw,fd=5,pgrp=31497,minproto=2,maxproto=4 0 0
/dev/sda1 /boot ext3 rw,nosuid,nodev,relatime 0 0
#
probing /boot works.
# /usr/sbin/grub-probe --target=device /boot
/dev/sda1
#
I think this is becuase /boot is on /dev/sda1,
but / is on encrypted (LUKS) LVM volume as /dev/mapper/movax2_vg-movax2_lv_root
# ls -l /dev/mapper/movax2_vg-movax2_lv_root
lrwxrwxrwx 1 root root 7 07-08 04:32 /dev/mapper/movax2_vg-movax2_lv_root ->
../dm-0
# ls -l /dev/dm-0
brw-rw---- 1 root disk 254, 0 07-08 05:35 /dev/dm-0
#
# strace /usr/sbin/grub-probe -v --target=device /
...
...
chdir("mapper") = 0
getdents64(4, /* 9 entries */, 32768) = 368
lstat64("movax2_vg-movax2_lv_swap", {st_mode=S_IFLNK|0777, st_size=7, ...}) = 0
lstat64("movax2_vg-movax2_lv_root", {st_mode=S_IFLNK|0777, st_size=7, ...}) = 0
lstat64("movax2_vg-movax2_lv_tmp", {st_mode=S_IFLNK|0777, st_size=7, ...}) = 0
lstat64("movax2_vg-movax2_lv_var", {st_mode=S_IFLNK|0777, st_size=7, ...}) = 0
lstat64("movax2_vg-movax2_lv_usr", {st_mode=S_IFLNK|0777, st_size=7, ...}) = 0
lstat64("movax2_vg-movax2_lv_home", {st_mode=S_IFLNK|0777, st_size=7, ...}) = 0
lstat64("control", {st_mode=S_IFCHR|0600, st_rdev=makedev(10, 59), ...}) = 0
getdents64(4, /* 0 entries */, 32768) = 0
chdir("/dev") = 0
close(4) = 0
lstat64("disk", {st_mode=S_IFDIR|0755, st_size=120, ...}) = 0
open("disk", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = 4
...
...
It looks tht grub-probe ignore first files is they are symlinks!
Why grub-probe cannot just open /dev/mapper/movax2_vg-movax2_lv_root (as it is
is mtab and /proc/mount)?
I just do not understand why grub-probe is enumerating all devices.
Not only this is error prone, but can be slow.
Thanks.
--
Witold Baryluk
JID: witold.baryluk // jabster.pl
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