Troubleshooting7–6
7.2.5 Troubleshooting stalled mount operations
If a mount operation stalls, you can troubleshoot the problem on the HP SFS system. Refer to Chapter 9 of
the HP StorageWorks Scalable File Share System User Guide (specifically the Troubleshooting client mount
failures section) for more information.
7.3 O p e r a t i o n a l i s s u e s
This section deals with issues that may arise when client nodes are accessing data on Lustre file systems. The
section is organized as follows:
• A find search executes on the global file system on all client nodes (Section 7.3.1)
• Investigating file system problems (Section 7.3.2)
• Reset client nodes after an LBUG error (Section 7.3.3)
• Access to a file system hangs (Section 7.3.4)
• Access to a file hangs (ldlm_namespace_cleanup() messages) (Section 7.3.5)
• Troubleshooting a dual Gigabit Ethernet interconnect (Section 7.3.6)
7.3.1 A find search executes on the global file system on all client nodes
If a find command executes on the global file system on all client nodes simultaneously, it may be because
the slocate package is installed on client nodes. See Section 2.2.3.4 or Section 3.3.4.5 for instructions
on how to configure the slocate package to prevent this problem.
7.3.2 Investigating file system problems
This section provides some useful tips for investigating and solving potential problems with file systems.
To determine how a file is striped across OST services, enter the command shown in the following example,
where the file is called scratch:
# lfs getstripe scratch
OBDS:
0: OST_south2_UUID
1: OST_south2_2_UUID
2: OST_south2_3_UUID
3: OST_south2_4_UUID
./scratch
obdidx objid objid group
1 2 0x2 0
You cannot change the striping configuration on an existing file; however, you can recreate a file and
change the striping configuration on the new file.
To recreate a file with a new striping configuration, perform the following steps:
1. Use the cp command to copy the incorrectly striped file to a new file name, as shown in the following
example, where the incorrectly striped file is called scratch:
# cp scratch scratch.new
# lfs getstripe scratch.new
OBDS:
0: ost1_UUID
1: ost2_UUID
2: ost3_UUID
3: ost4_UUID
./scratch.new
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