A.2.7.6 Growing a File System

To grow a striped or RAID5 volume containing a file system, you must have the free space on the same number of disks that are currently in the stripe or RAID5 volume. For example, if you have four 1GB disks striped together (giving you a 4GB file system), and you wish to add 1GB of space (to yield a 5GB filesystem), you must have four new disks, each with at least .25GB of free space. In other words, you can not add one disk to a 4-disk stripe.

The SSVM or CVM graphical user interface will choose the disks on which to grow your file system. To select the specific disks on which to grow the file system, use the command line interface instead.

UFS file systems cannot be shrunk. The only way to "shrink" a file system is to recreate the volume, run newfs on the volume, then restore the data from backup.