NFS Services Administrator Guide (5900-3045, March 2013)

5 Troubleshooting NFS Services

This chapter describes tools and procedures for troubleshooting the NFS Services. This chapter

addresses the following topics:

• “Common Problems with NFS” (page 93)

• “Performance Tuning” (page 100)

• “Logging and Tracing of NFS Services” (page 102)

Common Problems with NFS

This section lists the following common problems encountered with NFS and suggests ways to

correct them.

• “Sharing a mounted filesystem as NFS filesystem through LOFS is not recommended” (page 93)

• “NFS “Server Not Responding” Message” (page 94)

• ““Access Denied” Message” (page 95)

• ““Permission Denied” Message” (page 96)

• ““Device Busy” Message” (page 96)

• ““Stale File Handle” Message” (page 97)

• “A Program Hangs” (page 98)

• “Data is Lost Between the Client and the Server” (page 98)

• ““Too Many Levels of Remote in Path” Message” (page 99)

Sharing a mounted filesystem as NFS filesystem through LOFS is not recommended

Problem

Sharing a mounted filesystem as NFS filesystem through LOFS creates a non-unique file handle for

the filesystem. Sharing multiple such filesystems may cause the following issues at the NFS server

and NFS client:

• Incorrect file contents at the NFS server and NFS client.

• Incorrect directory listing at the NFS client. The NFS client may show directories from another

LOFS filesystem.

• Data corruption when writing a file, as the NFS server may write to the wrong file and

filesystem.

For these reasons, HP does not recommend sharing a mounted filesystem as NFS filesystem through

LOFS.

NOTE: A LOFS filesystem without any filesystems under it can be exported correctly as it will

have a unique file handle.

Workaround

While sharing a mounted filesystem through LOFS, manually assign a unique device-id using the