Reorganizing a file system


Reorganizing a file system
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You can reorganize or compact a fragmented file system using fsadm, even while the file system is mounted. This may help shrink a file system that could not previously be decreased.

To reorganize a VxFS file system

Use the fsadm command to reorganize a VxFS file system:

  fsadm [-t vxfs] [-e] [-d] [-E] [-D] [-H] [-r rawdev] mount_point

vxfs	The file system type.
-d	Reorders directory entries to put subdirectory entries first, then all other entries in decreasing order of time of last access. Also compacts directories to remove free space.
-D	Reports on directory fragmentation.
-e	Minimizes file system fragmentation. Files are reorganized to have the minimum number of extents.
-E	Reports on extent fragmentation.
-H	Displays the storage size in human-friendly units (KB/MB/GB/TB/PB/EB), when used with the -E and -D options.
mount_point	The file system's mount point.
-r rawdev	Specifies the path name of the raw device if there is no entry in `/etc/fstab` and fsadm cannot determine the raw device.

To perform free space defragmentation

Use the fsadm command to perform free space defragmentation of a VxFS file system:
```
  fsadm [-t vxfs] [-C] mount_point
```

vxfs	The file system type.
-C	Minimizes file system free space fragmentation. This attempts to generate bigger chunks of free space in the device.
mount_point	The file system's mount point.

The following example reorganizes the file system mounted at /mnt1.

Example of reorganizing a VxFS file system

Reorganize the VxFS file system mounted at /mnt1:
```
  # fsadm -t vxfs -EeDd /mnt1
```

The following example minimizes the free space fragmentation of the file system mounted at /mnt1.

Example of running free space defragmentation

Minimize the free space of the the VxFS file system mounted at /mnt1:
```
  # fsadm -t vxfs -C /mnt1
```

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