JFS online backups

You can make a point-in-time image of a JFS file system that you can then use for backup purposes.

For a JFS file system, you can split off a read-only static copy of a mirrored copy of the file system. Typically, a mirrored copy is updated whenever the original file system is updated, but this point-in-time copy does not change. It remains a stable image of the point in time at which the copy was made. When this image is used for backing up, any modifications that begin after you begin the procedure to create the image might not be present in the backup copy. Therefore, it is recommended that file system activity be minimal while the split is taking place. Any changes that occur after the split is made will not be present in the backup copy.