Hi! I have one problem. One of my HDD have many errors by smarctl, on this HDD was one of aufs branches. I just removed record for this branch in /etc/fstab and executed mount -o remount /storage and directly copied all data to other branches.
# mount /dev/md0 on / type ext3 (rw,noatime,errors=remount-ro) tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) udev on /dev type tmpfs (rw,mode=0755) tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620) /dev/sdc3 on /storage1 type ext3 (rw) /dev/sdd3 on /storage2 type ext3 (rw) /dev/sdg1 on /storage3 type ext3 (rw) /dev/sdh1 on /storage4 type ext3 (rw) /dev/sda1 on /storage5 type ext3 (rw) /dev/sdb1 on /storage6 type ext3 (rw) /dev/sde1 on /storage7 type ext3 (rw) /dev/sdf1 on /storage8 type ext3 (rw) none on /storage type aufs (rw,udba=reval,sum,create=mfsrr:209715200,br:/storage1=rw:/storage2=rw:/storage3=rw:/storage5=rw:/storage6=rw:/storage7=rw:/storage8=rw) But, # ls -la /sys/fs/aufs/si_ffad3e78c78e249b/ total 0 drwxr-xr-x 2 root root 0 Апр 19 14:20 . drwxr-xr-x 3 root root 0 Апр 19 14:20 .. -r--r--r-- 1 root root 4096 Апр 19 14:51 br0 -r--r--r-- 1 root root 4096 Апр 19 14:51 br1 -r--r--r-- 1 root root 4096 Апр 19 14:51 br2 -r--r--r-- 1 root root 4096 Апр 19 14:51 br3 -r--r--r-- 1 root root 4096 Апр 19 14:51 br4 -r--r--r-- 1 root root 4096 Апр 19 14:51 br5 -r--r--r-- 1 root root 4096 Апр 19 14:51 br6 -r--r--r-- 1 root root 4096 Апр 19 14:51 br7 -r--r--r-- 1 root root 4096 Апр 19 14:51 xi_path and # cat /sys/fs/aufs/si_ffad3e78c78e249b/br3 /storage4=rw I did umount -l /storage4 and then mount -o remount /storage yet: # mount /dev/md0 on / type ext3 (rw,noatime,errors=remount-ro) tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) udev on /dev type tmpfs (rw,mode=0755) tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620) /dev/sdc3 on /storage1 type ext3 (rw) /dev/sdd3 on /storage2 type ext3 (rw) /dev/sdg1 on /storage3 type ext3 (rw) /dev/sda1 on /storage5 type ext3 (rw) /dev/sdb1 on /storage6 type ext3 (rw) /dev/sde1 on /storage7 type ext3 (rw) /dev/sdf1 on /storage8 type ext3 (rw) none on /storage type aufs (rw,udba=reval,sum,create=mfsrr:209715200,br:/storage1=rw:/storage2=rw:/storage3=rw:/storage5=rw:/storage6=rw:/storage7=rw:/storage8=rw) # ls -la /sys/fs/aufs/si_ffad3e78c78e249b/ итого 0 drwxr-xr-x 2 root root 0 Апр 19 14:20 . drwxr-xr-x 3 root root 0 Апр 19 14:20 .. -r--r--r-- 1 root root 4096 Апр 19 14:51 br0 -r--r--r-- 1 root root 4096 Апр 19 14:51 br1 -r--r--r-- 1 root root 4096 Апр 19 14:51 br2 -r--r--r-- 1 root root 4096 Апр 19 14:51 br3 -r--r--r-- 1 root root 4096 Апр 19 14:51 br4 -r--r--r-- 1 root root 4096 Апр 19 14:51 br5 -r--r--r-- 1 root root 4096 Апр 19 14:51 br6 -r--r--r-- 1 root root 4096 Апр 19 14:51 br7 -r--r--r-- 1 root root 4096 Апр 19 14:51 xi_path and # cat /sys/fs/aufs/si_ffad3e78c78e249b/br3 /=rw This is not all. New files which uploaded on /storage turn out on /storage4 (I think so), it can be found on /storage, but no on any branch directly. # modinfo aufs filename: /lib/modules/2.6.38-1-amd64/kernel/fs/aufs/aufs.ko staging: Y version: 2.1-standalone.tree-38-rcN-20110228 description: aufs -- Advanced multi layered unification filesystem author: Junjiro R. Okajima <aufs-users@lists.sourceforge.net> license: GPL srcversion: 577F3DED7669D8EF6E422A5 depends: intree: Y vermagic: 2.6.38-1-amd64 SMP mod_unload modversions parm: brs:use <sysfs>/fs/aufs/si_*/brN (int) # uname -a Linux Host-2 2.6.38-1-amd64 #1 SMP Wed Mar 16 17:38:02 UTC 2011 x86_64 GNU/Linux -- WBR, Andrey Vasilishin CDIG1-UANIC, CDIG1-RIPE ------------------------------------------------------------------------------ Benefiting from Server Virtualization: Beyond Initial Workload Consolidation -- Increasing the use of server virtualization is a top priority.Virtualization can reduce costs, simplify management, and improve application availability and disaster protection. Learn more about boosting the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev
