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
$ fuser -m /srv
$ fuser -km /srv
but i can not umount /srv
$ umount /srv umount: /srv: device is busy umount: /srv: device is busy
what could keeping the device “busy” … ?