[Lustre-discuss] version 1.4 mount 1.6

[Aaron Knister]

I have a client running 1.4.11 and i want to mount a filesystem that's  
running on 1.6.4.1 servers. On the client I can ping the servers using  
lctl however a mount fails with an LBUG on the mds.

The mount command on the 1.4.11 client is --

mount -t lustre 192.168.64.70 at o2ib:/data-mdtlov/client /mnt/lustre

The error on the server is --

LustreError: 7369:0:(lov_obd.c:227:lov_connect()) ASSERTION(lov- 
 >lov_connects == 1) failed
LustreError: 7369:0:(tracefile.c:431:libcfs_assertion_failed()) LBUG
ll_mdt_24     R  running task       0  7369      1          7370  7368  
(L-TLB)
  ffff81026e92ddd0 ffff8102ba45045c ffff810418438dc0 ffff8102823e0200
  0000000000000000 ffff810296765000 0000000000000000 ffff81041c2fd280
  ffffffff888c029f 0000000000000286 ffffffff8003cd0e ffff810418438140
Call Trace:
  [<ffffffff888c029f>] :mds:mds_handle+0xe7f/0x56ff
  [<ffffffff8003cd0e>] lock_timer_base+0x1b/0x3c
  [<ffffffff8001c1a2>] __mod_timer+0xb0/0xbe
  [<ffffffff885dcfb0>] :obdclass:class_conn2export+0x250/0x2d0
  [<ffffffff8868e277>] :ptlrpc:ptlrpc_main+0x1437/0x1df0
  [<ffffffff800867b0>] default_wake_function+0x0/0xe
  [<ffffffff8005bc25>] child_rip+0xa/0x11
  [<ffffffff8868ce40>] :ptlrpc:ptlrpc_main+0x0/0x1df0
  [<ffffffff8005bc1b>] child_rip+0x0/0x11

I thought 1.4 could mount a 1.6 filesystem.

Aaron Knister
Associate Systems Analyst
Center for Ocean-Land-Atmosphere Studies

(301) 595-7000
aaron at iges.org