1xfs_admin(8)                System Manager's Manual               xfs_admin(8)
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NAME

6       xfs_admin - change parameters of an XFS filesystem
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SYNOPSIS

9       xfs_admin [ -eflu ] [ -L label ] [ -U uuid ] device
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DESCRIPTION

12       xfs_admin  uses the xfs_db(8) command to modify various parameters of a
13       filesystem.
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15       Devices that are  mounted  cannot  be  modified.   Administrators  must
16       unmount  filesystems  before xfs_admin or xfs_db(8) can convert parame‐
17       ters.  A number of parameters of a mounted filesystem can  be  examined
18       and modified using the xfs_growfs(8) command.
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OPTIONS

21       -e     Enables  unwritten  extent support on a filesystem that does not
22              already have this enabled.
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24       -f     Specifies that the filesystem image to be processed is stored in
25              a regular file at device (see the mkfs.xfs -d file option).
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27       -j     Enables  version  2 log format (journal format supporting larger
28              log buffers).
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30       -l     Print the current filesystem label.
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32       -u     Print the current filesystem UUID  (Universally  Unique  IDenti‐
33              fier).
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35       -L label
36              Set the filesystem label to label.  XFS filesystem labels can be
37              at most 12 characters long; if label is longer than  12  charac‐
38              ters,  xfs_admin  will  truncate it and print a warning message.
39              The filesystem label can be cleared using the special "--" value
40              for label.
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42       -U uuid
43              Set  the  UUID  of  the filesystem to uuid.  A sample UUID looks
44              like this: "c1b9d5a2-f162-11cf-9ece-0020afc76f16".  The uuid may
45              also  be  nil,  which  will  set the filesystem UUID to the null
46              UUID.  The uuid may also be generate, which will generate a  new
47              UUID for the filesystem.
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49       The mount(8) manual entry describes how to mount a filesystem using its
50       label or UUID, rather than its block special device name.
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SEE ALSO

53       mkfs.xfs(8), mount(8), xfs_db(8), xfs_growfs(8), xfs(5).
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