Messages in this thread | | | Date | Tue, 03 May 2005 07:38:33 -0500 | From | Davy Durham <> | Subject | Re: ext3 issue.. |
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I was thinking about delving into this problem a bit. I don't have any unpartitioned free space on my physical drive. I was going to ask if it's possible to create a virtual device in RAM or in a file that I could then create an ext3 file system on for testing.. I'm at least trying to recreate the situation of the negative diskspace usage.. then maybe try to debug ext3 a bit. At first I thought "oh RAMFS!", then "no wait, I couldn't create an EXT3 file system that way".. I need a non-physical (block? or character?) device.
Thanks, Davy
Davy Durham wrote:
> Greetings, > I'm having an issues with ext3. For about 3 months the /home > partition has had low-to-medium use/activity.. adding files, nightly > log rotations, some mysql dbs coming and going at a slow pace.. Well, > yesterday after I had migrated everything off of it (no files in /home > anymore) the df output looked like this: > > # uptime > 10:35:54 up 96 days, 14:22, 1 user, load average: 0.00, 0.00, 0.00 > # df -h > Filesystem Size Used Avail Use% Mounted on > /dev/ide/host0/bus0/target0/lun0/part1 > 2.0G 483M 1.4G 26% / > /dev/ide/host0/bus0/target0/lun0/part6 > 33G -64Z 31G 101% /home > > I did notice that if I created a file (cat /dev/zero >/home/foo) of > significant size that I could make it look normal again.. So I figure > it's an underflow in some count. > > Crazy huh? Well, I unmounted /home and did an fsck -f on the > partition and remounted it. Then everything looked okay. > > --- > > Well today on a different server (that I have not cleaned off yet) > that has been up and running for 6 months is saying the same thing: > > # uptime > 10:39:16 up 181 days, 2:42, 2 users, load average: 0.00, 0.00, 0.00 > # df -h > Filesystem Size Used Avail Use% Mounted on > /dev/ide/host0/bus0/target0/lun0/part1 > 2.0G 483M 1.4G 26% / > /dev/ide/host0/bus0/target0/lun0/part6 > 33G -64Z 31G 101% /home > > Now, this server is still in production. I could bring it down for a > brief time to fsck or reboot it, but I'd be afraid to. du -h /home > shows that really only 268M is used. > > If I create a large file (176M) in /home it then don't underflow on > the df, but is still incorrect. > > > Is this a known issue with ext3? Or ext2? Anything I should or should > not do about it? > > Thanks, > Davy > > > > > > BTW- df -k looks like > # df -k > Filesystem 1K-blocks Used Available Use% Mounted on > /dev/ide/host0/bus0/target0/lun0/part1 > 2054064 493660 1454380 26% / > /dev/ide/host0/bus0/target0/lun0/part6 > 33690964 -73786976294838186940 31971456 101% /home > > - > To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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