Resolving Stale Nfs File Systems; Checking User And Server Authentication Issues; Resolving The "Missing Srv Record In Dns" Error - IBM Storwize V7000 Unified Problem Determination Manual

Resolving stale NFS file systems

You can resolve problems with stale NFS file systems on Storwize V7000 Unified
file modules. A file module might have the file system mounted, but the file
system remains inaccessible due to a stale NFS file handle.
Procedure
To identify and resolve stale file handle problems, perform this procedure:
1. To identify stale NFS file handle problems, log in to the active management
2. If the command reports a stale NFS file handle on a particular file system, see

Checking user and server authentication issues

If you cannot log in or if a connection cannot be established between servers, such
issues could occur as a result of authentication failure.
About this task
If you are sure that you have used the correct user ID and password, your user
account might have been deleted or corrupted.
Refer to these topics in the IBM Storwize V7000 Unified Information Center "Planning
for user authentication", "Verifying the authentication configuration", "Establishing
user and group mapping for client access", and "chkauth".
If you cannot resolve the issue, contact the authentication server administrator to
validate or reestablish your account.
Refer to "Managing authentication server integration" for more information about
authentication and server configuration.

Resolving the "Missing SRV record in DNS" error

About this task
If the "Missing SRV record in DNS" error displays when you configure the active
directory (AD) using the cfgad command, similar to the following example, verify
If you find input/output errors and messages about a failure to read the
super block, the problem is with the DMAPI clients of the TSM/HSM
system.
Check for disk-related problems, such as errors reading from a disk or
errors showing a non-existent disk. For these errors, check whether the
path to the storage system is working. If it is, verify that the system
itself is in working order.
b. For additional information, refer to the "Diagnostics: Troubleshooting
tables" information in "Troubleshooting the System x3650" in the IBM
Storwize V7000 Unified Information Center.
c. If file systems remain unmounted, contact IBM support.
node as root user and enter the onnode all df | grep NFS command:
# onnode all df | grep NFS
df: `/ibm/gpfs0': Stale NFS file handle
"Working with file modules that report a stale NFS file handle" on page 276 for
instructions on file system recovery.
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Chapter 4. File module