The Planet Forums > No space left creating a new TMP partition

Full Version: No space left creating a new TMP partition

The Planet Forums > System Administration > General Support Questions

Sh4ka

Dec 15 2006, 03:06 PM

Hello,

Iam securing /tmp and /devh/shm directories, /dev/shm is already secure, but I'm getting some erros when I'm trying to create a new tmp partition, it seems it is blocked at 256 MBs.

CODE

[root@hostingX11.com:~]cd /dev/; dd if=/dev/zero of=tmpMnt bs=1024 count=800000

dd: writing `tmpMnt': No space left on device

249477+0 records in

249476+0 records out

[root@hostingX11.com:~]ls -alh tmpMnt

-rw-r--r-- 1 root root 244M Dec 15 21:20 tmpMnt

[root@hostingX11.com:~]pwd

/dev

[root@hostingX11.com:~]df -ah

Filesystem Size Used Avail Use% Mounted on

/dev/sda3 150G 60G 83G 42% /

none 0 0 0 - /proc

none 0 0 0 - /sys

none 0 0 0 - /dev/pts

usbfs 0 0 0 - /proc/bus/usb

/dev/sda1 99M 7.1M 87M 8% /boot

none 245M 0 245M 0% /dev/shm

none 0 0 0 - /proc/sys/fs/binfmt_misc

sunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs

[root@hostingX11.com:~]

How can I increment space in this partition, or be able to create a new one bigger than this size?

Thanks.

James Jhurani

Dec 21 2006, 05:41 PM

first off... "df -i" make sure your inodes are not all used up.

second, create the tmpMnt, the try and create another one, and see if it fails before 256MB. If so, fsck the drive. If not its probably time to open a ticket with tech support.

ScottPO

Dec 21 2006, 07:11 PM

Hi Sh4ka,
The following only applies if you are running RHES4, which uses tmpfs for /dev. Check /etc/redhat-release to be sure if this is you.

The problem is that I think /dev is a tmpfs mount. df is lying to you, it only reads /etc/mtab. However, /dev was mounted before /etc, so its mount isn't in /etc/mtab (chicken and the egg thing, I think). It would be more accurate to read /proc/mounts. There you should find /dev is a tmpfs. If this is the case, then dev can only be one half the size of available RAM. This makes sense, dev was not intended to be a file store, rather, it was just supposed to store a whole bunch of block and character devices, which take up very little space. Here's what I mean about df vs. /proc/mounts:

QUOTE

[scott@localhost tmp]$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda2 4956316 4450040 250444 95% /
/dev/hda1 101086 12958 82909 14% /boot
tmpfs 322648 0 322648 0% /dev/shm
/dev/hda5 10434156 8687328 1208252 88% /home
/dev/hda6 1984016 333516 1548088 18% /tmp
[scott@localhost tmp]$

Notice how df left out /dev. Now look at /proc/mounts:

QUOTE

[scott@localhost tmp]$ cat /proc/mounts
rootfs / rootfs rw 0 0
/dev/root / ext3 rw,data=ordered 0 0
/dev /dev tmpfs rw 0 0 <----------------------THIS LINE HERE
/proc /proc proc rw 0 0
/sys /sys sysfs rw 0 0
none /selinux selinuxfs rw 0 0
/proc/bus/usb /proc/bus/usb usbfs rw 0 0
devpts /dev/pts devpts rw 0 0
/dev/hda1 /boot ext3 rw,data=ordered 0 0
tmpfs /dev/shm tmpfs rw 0 0
/dev/hda5 /home ext3 rw,data=ordered 0 0
/dev/hda6 /tmp ext3 rw,data=ordered 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0
[scott@localhost tmp]$

Oh, how magical, it's there! Now, if this is what your system is doing, you'll need to use a different location for for that tmpMnt file. Maybe in /? I don't know, it's up to you to find a mount point that has space.

Hope this helps.

Scott

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