topic Re: storage in root is 100% usage, what to remove to free it in Operating System - Linux

storage in root is 100% usage, what to remove to free it

ArAgOnHaMz — Sun, 20 Apr 2014 23:05:38 GMT

Hi,

You can see below my space at '/' is 100% use.

Filesystem Size Used Avail Use% Mounted on

/dev/cciss/c0d0p6 20G 19G 0 100% /

/dev/cciss/c0d0p7 9.7G 151M 9.1G 2% /tmp

/dev/cciss/c0d0p5 20G 2.0G 17G 11% /usr

/dev/cciss/c0d0p3 20G 6.5G 12G 36% /var

/dev/cciss/c0d0p2 20G 3.5G 15G 19% /opt

/dev/cciss/c0d0p1 2.0G 41M 1.8G 3% /boot

/dev/mapper/vg0-lv0 8.8T 7.0G 8.3T 1% /global/home

/dev/mapper/vg1-lv1 7.6T 22G 7.2T 1% /global/apps

Im new to these things, please help me how to find out what is exactly causing this issue. I wanted to know maybe is there any hidden files or something that cause this problem. Or maybe is it a harddrive failure.?

Thanks in advance

Hamar

P.S. This thread has been moved from storage>General to Linux > sysadmin. -HP Forum Moderator

Re: storage in root is 100% usage, what to remove to free it

Johan Guldmyr — Sat, 19 Apr 2014 11:13:06 GMT

Hi,

you can use 'du' to find out what is using the most. For example this:

cd /

du -ch --max-depth=3 >> /tmp/listall

would give you a list in /tmp/listall that has all the directories within 3 levels and how large each is.

20G for /opt and /usr was perhaps a bit too much?

Re: storage in root is 100% usage, what to remove to free it

ArAgOnHaMz — Sat, 19 Apr 2014 20:55:38 GMT

I can do that and infact i have tried listed themout, but the problem is that whenever i use the command du, it just stops there on the screen and hang. Any other ways to see them.

Re: storage in root is 100% usage, what to remove to free it

Johan Guldmyr — Sun, 20 Apr 2014 04:48:38 GMT

If you run the command I showed then all the files should be listed in /tmp/listall, not on the screen.

If there's nothing in there either, check /var/log/messages (might vary, what OS are you running) for errors.

There are other tools than du to list files (find for example).

Re: storage in root is 100% usage, what to remove to free it

Matti_Kurkela — Sat, 26 Apr 2014 09:45:58 GMT

The "du" command will search through all the directories (optionally up to the requested depth) to check the disk space occupied by each file and directory. This can take a while, especially if you have a huge number of tiny files somewhere.

But if the du command really hangs forever, then there might be filesystem corruption and/or hard drive failure. Use "dmesg | less" to see a buffer of latest kernel messages: does the dmesg output contain anything that looks like a disk error?

The problem with the "dmesg" output is that it usually does not include timestamps for the messages. Usually, the important messages from dmesg are also stored to the syslog files in /var/log, which include a timestamp for each message. If you have a filesystem/disk problem, looking at the logs might allow you to determine when the problem started.

Note that if you have a filesystem/disk problem that causes processes to hang, any backups taken after the problem started might well be incomplete.

Re: storage in root is 100% usage, what to remove to free it

ymahesh81 — Fri, 22 Aug 2014 16:36:18 GMT

Hamar,

Compare the o/p of du -sh / & df -h / ; if there is any deleted files are still open which you can find by the command lsof | grep -i deleted and find top usage directories with command ; du -sh / | sort -n -r | head -n 10