Help with XFS

[Thomas Førde <thomas.forde@xxxxxxxxxxxx>]

during the other day our XFS filesystem
had a unexpected shutdown according to logs.

un 16 15:48:42 strmng04 kernel: 0x0:
00 00 c0 46 01 00 c0 46 77 02 c0 46 fe 7d 00 40
Jun 16 15:48:42 strmng04 kernel: Filesystem
"sdf1": XFS internal error xfs_da_do_buf(2) at line 2276 of file
/home/buildcentos/rpmbuild/BUILD/xfs-kmod-0.4/_kmod_build_smp/xfs_da_bt$
Jun 16 15:48:42 strmng04 kernel:
Jun 16 15:48:42 strmng04 kernel: Call
Trace:<ffffffffa0211762>{:xfs:xfs_corruption_error+236} <ffffffffa023c7cc>{:xfs:kmem_zone_alloc+66}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffffa0202526>{:xfs:xfs_da_do_buf+1335} <ffffffffa0202653>{:xfs:xfs_da_read_buf+21}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffffa0202653>{:xfs:xfs_da_read_buf+21} <ffffffffa0207210>{:xfs:xfs_dir2_block_lookup_int+71}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffffa0207210>{:xfs:xfs_dir2_block_lookup_int+71}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffffa0207359>{:xfs:xfs_dir2_block_lookup+19}
<ffffffffa0206457>{:xfs:xfs_dir2_lookup+200}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffff801347b0>{__wake_up+54} <ffffffff801ef3a1>{__up_read+16}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffffa0229d22>{:xfs:xfs_dir_lookup_int+53}
<ffffffffa022e47d>{:xfs:xfs_lookup+74}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffffa02371e0>{:xfs:linvfs_lookup+48} <ffffffff80189fc5>{__lookup_hash+263}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffff8018a04f>{lookup_one_len+94} <ffffffffa03bd2bc>{:nfsd:nfsd_lookup+936}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffffa03c55fa>{:nfsd:nfsd3_proc_lookup+198}
<ffffffffa03ba7dc>{:nfsd:nfsd_dispatch+219}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffffa03474ac>{:sunrpc:svc_process+1227}
<ffffffff80134709>{default_wake_function+0}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffffa03ba31b>{:nfsd:nfsd+0} <ffffffffa03ba553>{:nfsd:nfsd+568}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffff80133470>{schedule_tail+55} <ffffffff80110fd3>{child_rip+8}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffffa03ba31b>{:nfsd:nfsd+0} <ffffffffa03ba31b>{:nfsd:nfsd+0}
Jun 16 15:48:42 strmng04 kernel:  
     <ffffffff80110fcb>{child_rip+0}

many of those. and at the end

Jun 16 15:50:13 strmng04 kernel: xfs_force_shutdown(sdf1,0x8)
called from line 4092 of file /home/buildcentos/rpmbuild/BUILD/xfs-kmod-0.4/_kmod_build_smp/xfs_bmap.c.
 Return address
 = 0xffffffffa01f7fb4
Jun 16 15:50:13 strmng04 kernel: Filesystem
"sdf1": Corruption of in-memory data detected.  Shutting
down filesystem: sdf1
Jun 16 15:50:13 strmng04 kernel: Please
umount the filesystem, and rectify the problem(s)


i have run xfs_check without any verbos
information given
i have run xfs_repair without any information
errors fixed.

when i try to mount the XFS filesystem
of 10TB, my 7.8 TB of data is now gone.

before:        
       /dev/sdf1        
   10527858560 8801101708 1726756852  84% /D5
after:        
       /dev/sdf1        
   10527858560       528 10527858032   1%
/D5

help, where did my data go, and how can
i get it back.