Hi all CentOS users,
I looked /var/log/messages log file and i realize something in "messages" files like below;
--- Oct 24 04:02:42 cube2 kernel: Buffer I/O error on device sdc, logical block 1545 ---
"sdc" is my storage and i switched off storage at 6 PM.
and when i checked messages log file,I saw faillog under /var/log directory like below:
-rw------- 1 root root 137438953440 Oct 24 15:39 faillog
its ~136 GB but my disk table size like below:
/dev/md1 497G 19G 453G 4% / /dev/md3 157G 15G 134G 10% /backup /dev/md0 243M 21M 210M 9% /boot tmpfs 32G 0 32G 0% /dev/shm /dev/sdc 805G 25G 739G 4% /mnt/sdc
Where is ~136 GB faillog file ? I tried force fsck but no error i have.
but i worried,Something is wrong ? I have a error about disk ?
If you help me,I will be happy.
Semih Gokalp wrote: ...
-rw------- 1 root root 137438953440 Oct 24 15:39 faillog
This is a file with "holes" in it, try
du /var/log/faillog
to get the size on disk.
Mogens
yes i did it before.
du /var/log/message
28 /var/log/faillog
but
ls -al /var/log/
-rw------- 1 root root 137438953440 Oct 24 17:37 faillog
but why it is different ?
2008/10/24 Mogens Kjaer mk@crc.dk:
Semih Gokalp wrote: ...
-rw------- 1 root root 137438953440 Oct 24 15:39 faillog
This is a file with "holes" in it, try
du /var/log/faillog
to get the size on disk.
Mogens
-- Mogens Kjaer, Carlsberg A/S, Computer Department Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark Phone: +45 33 27 53 25, Mobile: +45 22 12 53 25 Email: mk@crc.dk Homepage: http://www.crc.dk _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Semih Gokalp wrote:
yes i did it before.
du /var/log/message
28 /var/log/faillog
but
ls -al /var/log/
-rw------- 1 root root 137438953440 Oct 24 17:37 faillog
but why it is different ?
It is a sparse file. It has holes in it. Only a few blocks are actually allocated.
It is not an error.
Mogens
Thanks all for help.
Thanks again.
2008/10/24 Mogens Kjaer mk@crc.dk:
Semih Gokalp wrote:
yes i did it before.
du /var/log/message
28 /var/log/faillog
but
ls -al /var/log/
-rw------- 1 root root 137438953440 Oct 24 17:37 faillog
but why it is different ?
It is a sparse file. It has holes in it. Only a few blocks are actually allocated.
It is not an error.
Mogens
-- Mogens Kjaer, Carlsberg A/S, Computer Department Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark Phone: +45 33 27 53 25, Fax: +45 33 27 47 08 Email: mk@crc.dk Homepage: http://www.crc.dk _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On Fri, Oct 24, 2008 at 06:11:29PM +0300, Semih Gokalp enlightened us:
yes i did it before.
du /var/log/message
28 /var/log/faillog
but
ls -al /var/log/
-rw------- 1 root root 137438953440 Oct 24 17:37 faillog
but why it is different ?
It is what is called a "sparse file". Google should be able to tell you the details.
Matt
P.S. Please do not top post.
Semih Gokalp wrote:
yes i did it before.
du /var/log/message
28 /var/log/faillog
but
ls -al /var/log/
-rw------- 1 root root 137438953440 Oct 24 17:37 faillog
but why it is different ?
As already has been said: It's a sparse file with holes in it. As to why it has to be that big: Space is reserved for every user id which can possibly log in, depending on the *highest* uid which has ever logged in onto your system. You are on a 64bit system (I'm good, ain't I?) and you or some process has used a login shell with the user nfsnobody, which is UID_MAX - 1 on most, if not all, unix systems.
And that one has the id 4294967294, which means that there is some space reserved for all the other 4294967293 users which are below that uid.
Cheers,
Ralph
-
Matt Hyclak -
Mogens Kjaer -
Ralph Angenendt -
Semih Gokalp