You can use the fssnap command to create a read-only snapshot of a file system while the file system is mounted. A snapshot is a point-in-time image of a file system that provides a stable and unchanging device interface for backups. We refer to this snapshot as the backing-store file.
Unlike ufsdump, a UFS snapshot enables you to keep the file system mounted and the system in multiuser mode during backups. The snapshot is stored to disk, and then you can use Solaris backup commands like ufsdump, tar, and cpio to back up the UFS snapshot. The result is a more reliable backup.
When you use the fssnap command to create a file-system snapshot, observe how much disk space the backing-store file consumes. The backing-store file itself uses ...