Virtual TapeServer SCSI-to-FC Adapter User Manual

GL-7

Glossary

reset SCSI For a specific SCSI bus, the host clears all inputs and outputs and

then resets the bus and all the devices connected to it.

responder The logical function in an N_Port responsible for supporting the

exchange initiated by the originator in another N_Port. A FC

responder is comparable to a SCSI target. The VT5900-SA is

often the responder.

router An intelligent device within the SAN (storage area network)

infrastructure that can handle multiple protocols, such as Fibre

Channel and SCSI. The routing decision is based on paths

between address mappings among dispersed initiators and

targets.

router-to-router Configuration involving at least two routers where one router is

in Initiator Mode and another in Target Mode.

SAN Storage Area Network

SCC addressing A menu item. SCSI-3 Controller Commands (SCC) addressing is

used to address SCSI devices attached to the VT5900-SA using

the SCC logical unit addressing method. In SCC addressing

mode, the VT5900-SA will respond to FCP commands as a SCC

controller device.

SCSI Small Computer System Interface. An industry standard for

connecting peripheral devices and their controllers to an initiator.

SCSI adapter A 16-bit fast/wide SE or Differential or LVD or 8-bit narrow

single-ended physical connection between the VT5900-SA and

the SCSI devices. Each SCSI adapter supports up to sixteen (for

fast/wide) or eight (for narrow) SCSI devices, including itself.

SCSI addressing A SCSI adapter supports up to 16 devices, including itself. Each

device has its own unique SCSI address. The SCSI address of a

device dictates the device’s priority when arbitrating for the

SCSI bus. SCSI address “7” has the highest priority. The next

highest priority address is “6” followed by 5, 4, 3, 2, 1, 0, 15, 14,

13, 12, 11, 10, 9, 8, with “8” being the lowest priority address.

The narrow SCSI adapter is factory set to address 7. A narrow

SCSI adapter supports up to eight devices, including itself. SCSI

address “7” has the highest priority followed by 6, 5, 4, 3, 2, 1,

and 0.