SRPT is a SCSI RDMA Protocol (SRP) target implementation on top of SCST, a mid-level SCSI target subsystem for the Linux kernel. This software makes it possible for remote systems to access local storage over an InfiniBand network. This storage protocol target implementation offers a higher bandwidth and a lower latency than any other storage protocol target implementation available for Linux.
SCST is a mid-level SCSI target subsystem for Linux. This subsystem allows a remote host to access local storage devices through the SCSI protocol. SCST supports multiple network storage protocols, including iSCSI, SRP, and FCoE, and also supports Qlogic 22xx/23xx SCSI HBAs. Strong points of SCST are its stability, maturity, high performance, and low latency. See also the iSCSI-SCST, SRPT and scstqla2x00t projects, as well as open-fcoe.org.
rstash is a server and client for transferring files over a network into file drop boxes on the server. It is primarily aimed at transferring things such as backup files from one host to another without opening up complete shell accounts, NFS, FTP, or other full file transfer mechanisms. The server has a set of boxes into which the client can put named files in a write-only fashion. No access to any portions of the server's file system outside the configured drop boxes is permitted.
Hot Copy creates an instant point-in-time snapshot of any block device while the system is running without interrupting applications or requiring the use of LVM. As block level changes are made to the real device, hot copy makes a backup copy of the changed block. The changed blocks are efficiently stored in unused space on your hard disk. These stored changed blocks maintain a point-in-time snapshot and space is only needed when you make changes to the real device. You can even write to your snapshots.
fsarchiver is a system tool that allows you to save the contents of a filesystem to a compressed archive file. The filesystem can be restored on a partition that has a different size, and it can be restored on a different filesystem. Unlike tar/dar, fsarchiver also creates the filesystem when it extracts the data to partitions. Everything is checksummed in the archive in order to protect the data. If the archive is corrupt, you just lose the current file, not the whole archive.
Back In Time is a simple backup tool for Linux (Gnome & KDE4) inspired by the "flyback project" and "TimeVault". The backup is done by taking snapshots of a specified set of directories. All you have to do is configure: where to save snapshot, what directories to backup, and when a backup should be done (manually, every hour, every day, every week, or every month). It acts as a "user mode" backup system. This means that you can backup and restore only folders to which you have write access.