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JonnyFunFun
n00b
Joined: 12 Nov 2007
Posts: 2
Location: Olean, NY
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 Posted: Mon Dec 22, 2008 6:30 pm Post subject: fdisk reports 80gb, df shows only 16gb? |
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Hello everybody! I have a little server that was kicking around collecting dust for a while now running Gentoo with a software RAID mirror (it's a Promise PDC20276 MBFastTrak133). The mirror is done with two 80gb drives, so the entire disk is 80gb. I have the drive showing up in /dev/mapper just fine and there is only one partition on it (mounted as /). Fdisk shows the partition just fine as using up all 80gb, however when I run df, it only shows that the partition is 16gb. Is this just simply a bug with df, or does the system really think that partition is only 16gb? Any help would be appreciated as this is my first time really dealing with dmraid with Gentoo.
| Code: | valhalla jenzinna # fdisk -l /dev/mapper/pdc_gbehfaii
Disk /dev/mapper/pdc_gbehfaii: 80.0 GB, 80000000000 bytes
255 heads, 63 sectors/track, 9726 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x40e92dcf
Device Boot Start End Blocks Id System
/dev/mapper/pdc_gbehfaii1 1 9726 78124063+ 83 Linux
valhalla jenzinna # df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/pdc_gbehfaii1
16G 7.0G 8.0G 47% /
udev 10M 168K 9.9M 2% /dev
/dev/hda2 34G 1.9G 31G 6% /opt
shm 506M 0 506M 0% /dev/shm
valhalla jenzinna # uname -a
Linux valhalla 2.6.26-gentoo-r3 #1 SMP Tue Nov 25 21:58:02 EST 2008 i686 Intel(R) Pentium(R) 4 CPU 2.40GHz GenuineIntel GNU/Linux
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mgrela
Tux's lil' helper
Joined: 26 Jul 2008
Posts: 123
Location: Polska
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| Posted: Mon Dec 22, 2008 7:26 pm Post subject: |
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The filesystem size in its superblock may be inconsistent with the underlaying block device length. You need to check the block count of the filesystem like so (assuming you have ext2/3):
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4pll00555 ~ # dumpe2fs /dev/sda1 | grep "Block count"
dumpe2fs 1.41.3 (12-Oct-2008)
Block count: 96356
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If the fs is smaller than 80 GB (it probably will be) you can grow it using resize2fs.
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Maciej Grela
You just keep on trying till you run out of cake. |
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JonnyFunFun
n00b
Joined: 12 Nov 2007
Posts: 2
Location: Olean, NY
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| Posted: Tue Dec 23, 2008 2:13 am Post subject: |
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| I did not expect that to be as easy. Thank you for the help - I simply ran "resize2fs /dev/mapper/pdc_gbehfaii1" and all is well. I wonder why when I originally created the file system it only created the partition 16gb in size, instead of the 80gb I wanted - but it's a moot point now. |
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mgrela
Tux's lil' helper
Joined: 26 Jul 2008
Posts: 123
Location: Polska
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| Posted: Wed Dec 24, 2008 10:07 pm Post subject: |
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| JonnyFunFun wrote: | | I did not expect that to be as easy. Thank you for the help - I simply ran "resize2fs /dev/mapper/pdc_gbehfaii1" and all is well. I wonder why when I originally created the file system it only created the partition 16gb in size, instead of the 80gb I wanted - but it's a moot point now. |
That's great ! If only all linux problems were this easy  . If you consider your problem solved please add the keyword [closed] to this topic to make it easier to filter. You can do this by editing the subject of your first post in this topic. Thank you.
Best regards,
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Maciej Grela
You just keep on trying till you run out of cake. |
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