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Unmounting file systems on client nodes 4–7

4.6 Unmounting file systems on client nodes

You can use either the standard umount(8) command or the sfsumount command to unmount Lustre file

systems that have been mounted as follows:

• File systems mounted with the mount command

• File system mounted with the sfsmount command and the lnet: protocol

• File systems mounted with the sfsmount command and the http: protocol

You cannot use the umount command to unmount file systems that were mounted with the sfsmount

command and the ldap: protocol; in such cases, you must use the sfsumount command to unmount the

file systems.

To unmount a file system using the umount command, enter the command using the following syntax:

umount mountpoint [-o options]

The sfsumount command provides useful options that are not available with the standard umount

command—see Table 4-2 for a list of the options.

When unmounting file systems mounted with the lnet: protocol or the http: protocol, the sfsumount

command calls the umount command.

When unmounting file systems mounted with the ldap: protocol, the sfsumount command calls the

lconf command.

To unmount a file system on a client node using the sfsumount(8) command, enter the command using

the following syntax. The command unmounts the file system and unloads all Lustre kernel modules:

sfsumount filesystem|mountpoint [-o options]

sfsumount -a

where:

-a

Specifies that all Lustre file systems that are currently mounted on the client node are to be

unmounted.

fs=name N/A Specifies the name of the file system. This option is ignored

by the sfsmount command. The option allows the

sfsconfig command to process the appropriate file

system. It is good practice to use the fs option when using

the lnet: protocol; otherwise, it is hard to determine the

file system name. See Appendix A for a description of the

sfsconfig command.

keepurl N/A Specifies that an address is not to be converted to an

lnet: address. This option is ignored by the sfsmount

command. The option directs the sfsconfig command

not to automatically convert an entry that uses the ldap: or

http: protocol to the lnet: protocol.

ignoreif sfsmount This option is ignored by the sfsmount command. The

functionality of the option has been superseded by the use

of an appropriate options lnet setting in the /etc/

modprobe.conf.lustre or /etc/

modules.conf.lustre configuration files.

matchif sfsmount This option is ignored by the sfsmount command. The

functionality of the option has been superseded by the use

of an appropriate options lnet setting in the /etc/

modprobe.conf.lustre or /etc/

modules.conf.lustre configuration files.

Table 4-1 Mount options

Name mount and/or sfsmount Description

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 133 134

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