z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

unmount
Examples
Usage notes
codes. All data changes to files in the specified file system are
saved. If the data changes cannot be saved, the unmount request
fails.
force Also specifies that the system will unmount the file system
immediately. Any users accessing files in the specified file system
will receive failing return codes. If possible, all data changes to files
in the specified file system are saved. If the data changes to the
files cannot be saved, the unmount request continues and data is
lost.
Note: An unmount –o immediate request must be issued before
you can request an unmount –o force of a file system.
Otherwise, unmount –o force fails.
reset A reset request stops a previous unmount –o drain request.
Note: unmount –o reset is not supported in a sysplex.
–v Lists all file systems that are unmounted.
pathname... specifies the pathnames to use for locating the file system you want
unmounted. This may be the pathname for any file or directory within that file
system. For example, if the file system you want unmounted contains the file or
directory /u/wjs, you can issue:
unmount /u/wjs
and that will effectively unmount the file system.
1. The output of mount –q can be used for the input of unmount. For example:
mount -q /ict/hfsfir
can be used as input:
unmount $(mount -q /ict/hfsdir)
2. To unmount a file system that contains the file or directory /u/wjs:
unmount /u/wjs
3. To unmount a file system that contains the file or directory /u along with all other
file systems mounted over or below that file system:
unmount -R /u
v The path name for chmount/unmount is a node, symbolic links cannot be
followed unless a trailing slash is added to the symbolic link name. For example,
if /etc has been converted into a symbolic link, /etc -> $SYSNAME/etc, issuing
chmount -w /etc (without the trailing slash) will result in trying to chmount -w
/etc -> $SYSNAME/etc. This may result in RACF errors depending on the
security access for the symlinked file. However, adding the trailing slash, by
specifying chmount -w /etc/ the symlink will be followed and RACF will
determine the access from the symlinked file.
v The unmount shell command operates on the path name and its associated file
system. In the case where a path name has no file system mounted on it, the
associated file system is the one that contains the path. For example:
730 z/OS V1R9.0 UNIX System Services Command Reference