Operating Manual
U42093-J-Z716-1-74
Glossary
SCC Addressing
SCSI-3 Controller Commands (SCC) addressing is used to address SCSI
devices attached to the PSFR-CP41 using the SCC logical unit addressing
method. In SCC addressing mode, the PSFR-CP41 will respond to FCP
commands as in 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 differential or 8-bit narrow single-ended physical
connection between the PSFR-CP41 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 fast/wide 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 fast/wide 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.
SCSI Bus
The means of transferring SCSI data between SCSI devices. It is an 8-bit or
16-bit bus that supports up to eight or sixteen devices (including itself), in
any mix of initiators and targets, with the limitation that at least one initiator
and one target must be present.
SCSI Device
A single unit on the SCSI bus, identifiable by a unique SCSI address. A SCSI
device can act as an initiator or target. For SCSI-3, each SCSI device
supports up to sixteen LUNs.
SCSI Port
An opening at the back of the PSFR-CP41 providing connection between
the SCSI adapter and the SCSI bus.
