For a list of supported configurations, see the HP Data Protector product announcements, software notes, and references or http://www.hp.com/support/ manuals.
This topology allows the connecting of two nodes, typically a server and a backup device. It provides the basic benefit of improved performance and longer distances between nodes.
Loop topology
The loop topology is based on the Fibre Channel Arbitrated Loop
LIP
A Loop Initialization Primitive (Protocol) (LIP) may be triggered by a number of causes, most common being the introduction of a new device. The new device could be a former participant that has been powered on or an active device that has been moved from one switch port to another. A LIP occurrence can cause an undesirable disruption of an ongoing process on the SAN, for example, a tape backup operation. It resets the SCSI bus connecting the SCSI/FC Bridge and the node (SCSI device). See Figure 52 on page 174.
In the case of a backup or restore, a SCSI bus reset is registered as a write error. Data Protector aborts all operations upon write errors. In the case of backups, it is recommended to (copy the information already backed up on the medium and then) reformat the medium and restart the backup.
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