df does not show free space if using UUIDs

Thank you for your bug report.

I can't reproduce this problem in Feisty, coreutils-5.97-5.2ubuntu3. One difference between my setup and yours is that I'm using IDE rather than SCSI.

Are you using a RAID setup or anything? Is it true SCSI, or are you using SCSI emulation?
Please give (1) your coreutils package version, and (2) the output of your df command.

I am using a SATA system, which is SCSI emulation. No RAID. If you can't reproduce this bug in an IDE system, I guess that makes a difference. I am using Feisty stock coreutils. This bug was also present in Edgy, by the way.

Here comes the output of 'df', the output of 'mount' and a 'cat /etc/fstab'. As you can see, 'mount' fails to report UUID-mounted volumes, too:

pgquiles@pravetz:~$ df
Filesystem 1K-blocks Used Available Use% Mounted on
varrun 1037948 144 1037804 1% /var/run
varlock 1037948 0 1037948 0% /var/lock
procbususb 1037948 120 1037828 1% /proc/bus/usb
udev 1037948 120 1037828 1% /dev
devshm 1037948 0 1037948 0% /dev/shm
lrm 1037948 33788 1004160 4% /lib/modules/2.6.20-16-generic/volatile

pgquiles@pravetz:~$ mount
proc on /proc type proc (rw,noexec,nosuid,nodev)
/sys on /sys type sysfs (rw,noexec,nosuid,nodev)
varrun on /var/run type tmpfs (rw,noexec,nosuid,nodev,mode=0755)
varlock on /var/lock type tmpfs (rw,noexec,nosuid,nodev,mode=1777)
procbususb on /proc/bus/usb type usbfs (rw)
udev on /dev type tmpfs (rw,mode=0755)
devshm on /dev/shm type tmpfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
lrm on /lib/modules/2.6.20-16-generic/volatile type tmpfs (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
none on /proc/fs/vmblock/mountPoint type vmblock (rw)

pgquiles@pravetz:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/sda6
UUID=f83c0f6e-8336-4851-a899-183efe54791b / ext3 defaults,errors=remount-ro 0 1
# /dev/sda1
UUID=9877-489A /media/recovery vfat defaults,utf8,umask=007,gid=46 0 1
# /dev/sda2
UUID=0400-79EF /media/windows vfat defaults,utf8,umask=007,gid=46 0 1
# /dev/sda5
UUID=3f061cd1-70af-45de-9048-e5013dec6313 none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto 0 0

Thank you. Could you please also provide the contents of /proc/mounts, and /etc/mtab?

Here they come:

pgquiles@pravetz:~$ cat /proc/mounts
rootfs / rootfs rw 0 0
none /sys sysfs rw,nosuid,nodev,noexec 0 0
none /proc proc rw,nosuid,nodev,noexec 0 0
udev /dev tmpfs rw 0 0
/dev/disk/by-uuid/46dbf7b2-5708-44a4-b935-3430c8951a10 / ext3 rw,data=ordered 0 0
/dev/disk/by-uuid/46dbf7b2-5708-44a4-b935-3430c8951a10 /dev/.static/dev ext3 rw,data=ordered 0 0
tmpfs /var/run tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/lock tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /lib/modules/2.6.20-16-generic/volatile tmpfs rw 0 0
tmpfs /dev/shm tmpfs rw 0 0
devpts /dev/pts devpts rw 0 0
usbfs /dev/bus/usb/.usbfs usbfs rw 0 0
udev /proc/bus/usb tmpfs rw 0 0
usbfs /proc/bus/usb/.usbfs usbfs rw 0 0
tmpfs /var/run tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/lock tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/run tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/lock tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/run tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/lock tmpfs rw,nosuid,nodev,noexec 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
none /proc/fs/vmblock/mountPoint vmblock rw 0 0
tmpfs /var/run tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/lock tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/run tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/lock tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/run tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/lock tmpfs rw,nosuid,nodev,noexec 0 0

pgquiles@pravetz:~$ cat /etc/mtab
proc /proc proc rw,noexec,nosuid,nodev 0 0
/sys /sys sysfs rw,noexec,nosuid,nodev 0 0
varrun /var/run tmpfs rw,noexec,nosuid,nodev,mode=0755 0 0
varlock /var/lock tmpfs rw,noexec,nosuid,nodev,mode=1777 0 0
procbususb /proc/bus/usb usbfs rw 0 0
udev /dev tmpfs rw,mode=0755 0 0
devshm /dev/shm tmpfs rw 0 0
devpts /dev/pts devpts rw,gid=5,mode=620 0 0
lrm /lib/modules/2.6.20-16-generic/volatile tmpfs rw 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
none /proc/fs/vmblock/mountPoint vmblock rw 0 0

By my reading, those outputs show that the kernel is at least aware of / being mounted by the appropriate partition, and that mtab isn't. Probably a flaw in mount, rather than coreutils. However, I still show no sign of the /media/* drives. Are you absolutely sure those are mounted?

Could you please give me the output of "sudo mount -av"?

Thanks very much for your help.

Interestingly, Filelight also fails to display the space used by UUID-mounted filesystems. Maybe the bug is not in coreutils. I am attaching a screenshot.

The /media/* partitions are not mounted because I am not mounting them but that is not the point of this bug report. The problem is 'df' does not show the free space in '/'.

Oops! Forget the comment about Filelight, it was just I had forgot to scan the hard disk.

Since mount is apparently not recording the mounted / to /etc/mtab, the fault is probably mount's, rather than coreutils (reassigning).

Could you please tell me what happens when you attempt "sudo mount -av"?

pgquiles@pravetz:~$ sudo mount -av
mount: proc already mounted on /proc
mount: mount point /media/recovery does not exist
mount: special device /dev/disk/by-uuid/0400-79EF does not exist

Pau Garcia i Quiles:
What is the output of
blkid
?

pgquiles@pravetz:~$ /sbin/blkid
/dev/sda1: TYPE="ntfs"
/dev/sda2: TYPE="swap" UUID="1e2e4074-e819-4beb-8155-10a6029f871f"
/dev/sda3: UUID="46dbf7b2-5708-44a4-b935-3430c8951a10" SEC_TYPE="ext2" TYPE="ext3"

Confirmed.

guest@rajeev2:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
/dev/cdrom /media/cdrom0 udf,iso9660 user,noauto 0 0

# UUID based mounting
UUID=c4d20f5d-15b5-403e-81a3-afaed84f7428 / ext3 defaults,errors=remount-ro 0 1
UUID=709ceeae-7651-4aa2-8ff4-0e19565895c7 none swap sw 0 0

-------------------
guest@rajeev2:~$ cat /etc/mtab
proc /proc proc rw,noexec,nosuid,nodev 0 0
/sys /sys sysfs rw,noexec,nosuid,nodev 0 0
varrun /var/run tmpfs rw,noexec,nosuid,nodev,mode=0755 0 0
varlock /var/lock tmpfs rw,noexec,nosuid,nodev,mode=1777 0 0
procbususb /proc/bus/usb usbfs rw 0 0
udev /dev tmpfs rw,mode=0755 0 0
devshm /dev/shm tmpfs rw 0 0
devpts /dev/pts devpts rw,gid=5,mode=620 0 0
lrm /lib/modules/2.6.20-16-generic/volatile tmpfs rw 0 0
nfsd /proc/fs/nfsd nfsd rw 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
----------------
guest@rajeev2:~$ blkid
/dev/sdb1: TYPE="ntfs"
/dev/sdb5: UUID="709ceeae-7651-4aa2-8ff4-0e19565895c7" TYPE="swap"
-----------------
guest@rajeev2:~$ cat /proc/mounts
rootfs / rootfs rw 0 0
none /sys sysfs rw,nosuid,nodev,noexec 0 0
none /proc proc rw,nosuid,nodev,noexec 0 0
udev /dev tmpfs rw 0 0
/dev/disk/by-uuid/c4d20f5d-15b5-403e-81a3-afaed84f7428 / ext3 rw,data=ordered 0 0
/dev/disk/by-uuid/c4d20f5d-15b5-403e-81a3-afaed84f7428 /dev/.static/dev ext3 rw,data=ordered 0 0
tmpfs /var/run tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/lock tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /lib/modules/2.6.20-16-generic/volatile tmpfs rw 0 0
tmpfs /dev/shm tmpfs rw 0 0
devpts /dev/pts devpts rw 0 0
usbfs /dev/bus/usb/.usbfs usbfs rw 0 0
udev /proc/bus/usb tmpfs rw 0 0
usbfs /proc/bus/usb/.usbfs usbfs rw 0 0
tmpfs /var/run tmpfs rw,nosuid,nodev,noexec 0 0
tmpfs /var/lock tmpfs rw,nosuid,nodev,noexec 0 0
nfsd /proc/fs/nfsd nfsd rw 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0

----------------------

Note that "mount -f /" appears to fix but "mount -af" does not.
Changing /etc/fstab to specify a by device instead off uuid fixes.

I cannot reproduce this on gutsy. df shows the free space for my drives, all of which are mounted using UUID..

I am seeing this bug under 8.04. I just changed my ftab entries from using UUIDs to LABELs and df now again displays free space correctly.

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