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Operating Systems AIX NIM NFS file system cannot unmount Post 302746819 by MichaelFelt on Thursday 20th of December 2012 04:29:18 AM
Old 12-20-2012
I am guessing you are running a
Code:
nim -o define -t mksysb ...

command to perform these backups and it is the client that is not able to unmount.

To debug - you could start with using rpcinfo -p <NIM> | grep nfs to see if the nfs demons are recognized.

The other question I would have is whethr this client has more than one IP address and/or nim route back to the nim server. If it is, the way I debugged the interface being used by default is the telnet/ssh to the nim server (use the <NIM> name as hostname, and then after login, use the command "who" to show which IP address/hostname is recognized as originating IP address.

Compare these values to what a "working" client returns.

My gut feeling, if I read corrently it is the same client that fails, is that there is a configuration difference between this client and the one that succeed.
 

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mountd(8)						      System Manager's Manual							 mountd(8)

NAME
mountd - Services remote NFS compatible mount requests SYNOPSIS
mountd [-d] [-i] [-n] [-s] [exportsfile] FLAGS
Verifies the Internet addresses of hosts that make mount and unmount requests. If a client's address cannot be translated into a host name by the gethostbyaddr() function and then translated back into the same Internet address by the gethostbyname() function, the request is rejected. This option requires the BIND service for Internet address resolution. It offers the highest level of security, especially when combined with the -i option. Turns on Internet address verification and domain checking. If you are running the BIND service, mountd verifies that a host making a mount or unmount request is in the server's domain. Allows non-root mount requests to be served. This should only be specified if there are clients such as PC's that require it. ULTRIX BSD is allowed non-root mount requests by default. Use the -n flag to allow non-root mount requests. Verifies the Internet address of hosts that make mount and unmount requests. If a client's address cannot be translated into a host name by the gethostbyaddr() function, the request is rejected. If you are running the BIND service, the BIND server is used to translate the address. If you are not, the /etc/hosts file is used. If the -i option is not used and a client's address cannot be translated, the address is converted to a string of the form xx.xx.xx.xx. This allows access to exported file systems that do not specify a list of allowed hostnames. The -i option is automatically enabled when either the -d or the -s option is specified. Turns on Internet address verification and subdomain checking. If you are running the BIND service, mountd verifies that a host making a mount or unmount request is in the server's domain or subdomain. DESCRIPTION
The mountd daemon is the server for NFS protocol mount requests from clients. The mountd daemon responds to requests from remote computer systems to mount directories. When it receives a SIGHUP signal, mountd rereads the exports file. If you are on an NFS client and want to have changes to the export options on existing NFS client mounts take effect immediately, issue the showmount -e command and specify the name of the host that is exporting the directory or file system (where the exports file is located). This ensures that NFS is aware of the export list and options. The optional exportsfile argument specifies an alternate location for the exports file. /etc/exports is the default. Note, NFS Version 2 can export partitions that are greater than 2 gigabytes. However, they appear as 2 gigabyte partitions when viewed from NFS clients. FILES
Specifies the command path Contains a list of directories that can be exported Contains a table of local file systems mounted by remote NFS clients Contains errors logged by the mountd daemon RELATED INFORMATION
Commands: nfsstat(8), nfsd(8), portmap(8), showmount(8) Files: exports(4), mountdtab(4) delim off mountd(8)
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