[CentOS] unable to umount

J Martin Rushton martinrushton56 at btinternet.com
Sun Feb 22 14:51:14 UTC 2015


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On 22/02/15 14:19, Leon Fauster wrote:
> Hi,
> 
> on an EL5 XEN DOM0 system I have following volume
> 
> $ df -h /srv Filesystem            Size  Used Avail Use% Mounted
> on /dev/sdc1             917G  858G   60G  94% /srv
> 
> that partition was used by virtual machines but they were all
> halted.
> 
> service xendomains stop
> 
> $ xm list Name                                      ID Mem(MiB)
> VCPUs State   Time(s) Domain-0                                   0
> 3000     2 r-----    695.1
> 
> $ service xend stop
> 
> 
> nothing is using the partition $ lsof |grep srv <empty>

Run as root:
# lsof +D /srv

> 
> $ fuser -m /srv <empty>
> 

Again, run this as root.  Compare (test example from my system):
$ fuser -m /boot 2>/dev/null | wc
      0      44     264
# fuser -m /boot 2>/dev/null | wc
      0     223    1338

That's 180 processes I'd miss as an ordinary user.

> $ fuser -km /srv <empty>
> 
> 
> but i can not umount /srv
> 
> $ umount /srv umount: /srv: device is busy umount: /srv: device is
> busy
> 

I'm sure you've checked, but where is your PWD?

> 
> what could keeping the device "busy" ... ?
> 
> __ Thanks,
> 
> LF
> 
> 
> _______________________________________________ CentOS mailing
> list CentOS at centos.org 
> http://lists.centos.org/mailman/listinfo/centos
> 
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