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matroskin
Apprentice
Joined: 21 Jan 2003
Posts: 214
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 Posted: Sun Nov 04, 2012 8:01 am Post subject: disk utilization question |
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Hi
I have strange situation: I can not write new data to the disk, so actually disk is full, but linux thinks that 14G is still available
Here is my df output after cleaning some space
| Code: |
$ df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 15G 5.2G 8.8G 37% /
/dev/root 15G 5.2G 8.8G 37% /
tmpfs 3.9G 196K 3.9G 1% /run
rc-svcdir 1.0M 88K 936K 9% /lib64/rc/init.d
cgroup_root 10M 0 10M 0% /sys/fs/cgroup
udev 10M 0 10M 0% /dev
shm 3.9G 0 3.9G 0% /dev/shm
/dev/sdb3 292G 256G 22G 93% /home
none 1000M 0 1000M 0% /var/tmp/portage
none 300M 8.0K 300M 1% /tmp
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As you can see available and used sizes for home partition do not sum up to the total.
22G+256G=278G != 292G.
14G are missing
Home partition mounted as
| Code: | /dev/sdb3 on /home type ext4 (rw,noatime)
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Any ideas?
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aCOSwt
Bodhisattva
Joined: 19 Oct 2007
Posts: 2537
Location: Hilbert space
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| Posted: Sun Nov 04, 2012 9:42 am Post subject: |
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You can post the output of dumpe2fs -h /dev/sdb3 so that we can confirm my interpretation.
Be aware that if you created your filesystem with default features, you get 5% of the space reserved for root. (And not counted as "used")
(In order for your entire system not to be completely locked if an important partition was being actually 100% full)
=> Your filesystem will be said full for you as user from 95%)
Additionally, you get another default feature that keeps some free space on the filesystem in order for you to be able to increase the size of the table of inodes. I think this makes another 1%...
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Bigun
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Joined: 21 Sep 2003
Posts: 2196
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| Posted: Sun Nov 04, 2012 11:16 am Post subject: |
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Also post the output of df -ih please
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matroskin
Apprentice
Joined: 21 Jan 2003
Posts: 214
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| Posted: Sun Nov 04, 2012 3:30 pm Post subject: |
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Thank you for replies
dumpe2fs output (while mounted)
| Code: | $ dumpe2fs -h /dev/sdb3
dumpe2fs 1.42 (29-Nov-2011)
Filesystem volume name: home
Last mounted on: /var
Filesystem UUID: 06bce740-2ef6-46da-9a15-25cadbe8934b
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Filesystem flags: signed_directory_hash
Default mount options: (none)
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 19415040
Block count: 77651456
Reserved block count: 3882572
Free blocks: 9552141
Free inodes: 19001400
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 1005
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 8192
Inode blocks per group: 512
Flex block group size: 16
Filesystem created: Sun Mar 25 18:45:42 2012
Last mount time: Sun Nov 4 11:00:20 2012
Last write time: Sun Nov 4 11:00:20 2012
Mount count: 1
Maximum mount count: 36
Last checked: Sun Nov 4 10:58:07 2012
Check interval: 15552000 (6 months)
Next check after: Fri May 3 11:58:07 2013
Lifetime writes: 1740 GB
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 256
Required extra isize: 28
Desired extra isize: 28
Journal inode: 8
First orphan inode: 15864334
Default directory hash: half_md4
Directory Hash Seed: 4e17be98-e447-44c6-9617-d8a6cbe99002
Journal backup: inode blocks
Journal features: journal_incompat_revoke
Journal size: 128M
Journal length: 32768
Journal sequence: 0x000ea802
Journal start: 16952
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df output
| Code: | $ df -ih
Filesystem Inodes IUsed IFree IUse% Mounted on
rootfs 952K 263K 689K 28% /
/dev/root 952K 263K 689K 28% /
tmpfs 988K 324 987K 1% /run
rc-svcdir 988K 73 987K 1% /lib64/rc/init.d
cgroup_root 988K 5 988K 1% /sys/fs/cgroup
udev 988K 497 987K 1% /dev
shm 988K 1 988K 1% /dev/shm
/dev/sdb3 19M 407K 19M 3% /home
none 1.0M 1 1.0M 1% /var/tmp/portage
none 988K 12 988K 1% /tmp
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fschk (while unmounted) shows clean state
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Bigun
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Joined: 21 Sep 2003
Posts: 2196
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| Posted: Sun Nov 04, 2012 3:51 pm Post subject: |
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You seem to have enough free inodes.
How are you figuring that you can't write to the partition? Are you getting an error?
What happens when you run this command in a terminal?
| Code: | | touch ~/deleteme.txt |
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aCOSwt
Bodhisattva
Joined: 19 Oct 2007
Posts: 2537
Location: Hilbert space
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| Posted: Sun Nov 04, 2012 7:29 pm Post subject: |
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| matroskin wrote: | dumpe2fs output (while mounted)
$ dumpe2fs -h /dev/sdb3
Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Reserved block count: 3882572
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Ok, these confirm the suggestions I had made for your "lost" free space.
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