FC15 - Rescue Mtab

[belcenter]

Hello

When you installed a fresh 15. After that you run the FC15 Rescue Disc
and reboot to the FC15, the Mtab file has been corrupted with old value
of mounted partitions from Rescue Disc.

How can we repair that ?
Reinstall is not an option.

Issue of that my root partition is mounted twice +
Error on the startup

My Fstab is OK

/dev/sda1 / ext4 defaults 1 1
/dev/sda3 /home ext4 defaults 1 2
/dev/sda2 /var ext4 defaults 1 2
UUID=33a08ed1-4240-4de4-b50c-b242169d48c7 swap swap defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0



My mtab


rootfs / rootfs rw 0 0
/proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
/sys /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
udev /dev devtmpfs rw,nosuid,relatime,size=1968012k,nr_inodes=492003, mode=755 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode= 000 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0
tmpfs /run tmpfs rw,nosuid,nodev,noexec,relatime,mode=755 0 0

>> Beginning is from Rescue Disc.


Next is related to FSTAB.

/dev/sda1 / ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0
/proc/bus/usb /proc/bus/usb usbfs rw,relatime 0 0
/dev/sda3 /home ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0
/dev/sda2 /var ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0
sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw,relatime 0 0


It's the second time it happens. For the first server, i reinstalled on scratch.

Running a FC16 beta Rescue crashed

[jpollard]

/etc/mtab on F15 is a symbolic link to /proc/mounts

It cannot be a file corruption issue. Now if you tried deleting the /etc/mtab file, then you broke the link and will have to put it back.

Having multiple mounts show up is normal - this indicates that you have "bind" mounts (read manpage on mount).

Frequently this is due to sandboxing being enabled - that uses bind mounts to eliminate the need to make duplicate files of various things, which makes system updates more difficult.

There is no need to reinstall.

[belcenter]

Hello

The file is correctly linked to /proc/mounts but it's that file who is not created
when the server boots.

Seems that it's not a file creation but an append to the file. > We see the previous mounts
of the rescue CD.

---------- Post added at 05:35 PM ---------- Previous post was at 05:34 PM ----------

[root@ns2 ~]# cat /proc/mounts
rootfs / rootfs rw 0 0
/proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
/sys /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
udev /dev devtmpfs rw,nosuid,relatime,size=1968012k,nr_inodes=492003, mode=755 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode= 000 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0
tmpfs /run tmpfs rw,nosuid,nodev,noexec,relatime,mode=755 0 0
/dev/sda1 / ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0
/proc/bus/usb /proc/bus/usb usbfs rw,relatime 0 0
/dev/sda3 /home ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0
/dev/sda2 /var ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0
sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw,relatime 0 0

---------- Post added at 05:39 PM ---------- Previous post was at 05:35 PM ----------

Originally Posted by jpollard

/etc/mtab on F15 is a symbolic link to /proc/mounts

It cannot be a file corruption issue. Now if you tried deleting the /etc/mtab file, then you broke the link and will have to put it back.

Having multiple mounts show up is normal - this indicates that you have "bind" mounts (read manpage on mount).

Frequently this is due to sandboxing being enabled - that uses bind mounts to eliminate the need to make duplicate files of various things, which makes system updates more difficult.

There is no need to reinstall.

I checked on an other server and it seems i have delinked.
the mtab to /proc/mounts
[root@ns1 ~]# ls -lh /etc/mtab
-rw-r--r-- 1 root root 199 Oct 19 00:21 /etc/mtab

---------- Post added at 05:43 PM ---------- Previous post was at 05:39 PM ----------

Hum OK
Seems the solution is to delink the mtab , next boot mtab was recreated with correct values

[root@ns2 ~]# cat /etc/mtab
/dev/sda1 / ext4 rw 0 0
proc /proc proc rw 0 0
sysfs /sys sysfs rw 0 0
devpts /dev/pts devpts rw,gid=5,mode=620 0 0
tmpfs /dev/shm tmpfs rw 0 0
/dev/sda3 /home ext4 rw 0 0
/dev/sda2 /var ext4 rw 0 0
sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0

But i'm pretty sure that a fresh install didn't create partition mounted twice
+ lot of errors on the boot ! (Partition /sys already mounted, etc)

---------- Post added at 05:50 PM ---------- Previous post was at 05:43 PM ----------

Thanks For your Help

[Gareth Jones]

/etc/mtab is supposed to be a symlink to /proc/mounts, and the mtab you originally posted is normal (if a little minimal even). See http://forums.fedoraforum.org/showthread.php?t=271089 and http://forums.fedoraforum.org/showthread.php?t=269319 for example. I don't know if using a "real" /etc/mtab will work properly any more.

Gareth