Quantum Scalar 218FC User Manual page 119

RMA number
SCSI
SCSI Adapter
SCSI Admin
SCSI ID
SCSI bus
SCSI Device
SCSI Port
Short Wave
Single-Ended
slot
SNMP
An identifying number given to a customer who needs to return
equipment for repair, whether under warranty or not.
Small Computer System Interface. An industry standard for connecting
peripheral devices and their controllers to a microprocessor. The SCSI
defines both hardware and software standards for communication between
a host computer and a peripheral.
A 16-bit fast/wide differential or 8-bit narrow single-ended physical
connection between the FCR100 and the SCSI devices. Each SCSI
adapter supports up to sixteen (for fast/ wide) or eight (for narrow) SCSI
devices, including itself.
A menu name used to reset the SCSI bus or take the SCSI bus offline.
A fast/wide SCSI adapter supports up to 16 devices, including itself. Each
device has its own unique SCSI ID. The SCSI ID of a device dictates the
device's priority when arbitrating for the SCSI bus. SCSI ID "7" has the
highest priority. The next highest priority ID is "6" followed by 5, 4, 3, 2,
1, 0, 15, 14, 13, 12, 11, 10, 9, 8, with "8" being the lowest priority ID.
The fast/wide SCSI adapter is factory set to ID 7. A narrow SCSI adapter
supports up to eight devices, including itself. SCSI ID "7" has the highest
priority followed by 6, 5, 4, 3, 2, 1, and 0.
Signal path or line shared by the devices on the same SCSI channel.
Information is often sent to all devices throughout the same bus; only the
device to which it is addressed will accept it.
A single unit on the SCSI bus, identifiable by a unique SCSI ID. A SCSI
device can act as an initiator or target. For SCSI-2, each SCSI device
supports up to eight LUNs.
An opening at the back of the FCR100 providing connection between the
SCSI adapter and the SCSI bus.
Lasers or LEDs that emit light with wavelengths around 780 nm or 850
nm. Short wave lasers are used for FC links up to ~700 m. They are
typically used with multimode fibre. The preferred fibre core size is 50
micron as this fibre has large bandwidth so that the distance is limited by
the fibre attenuation. A 62.5-micron core size is also supported for
compatibility with existing FDDI installations. Fibre of this type has
smaller bandwidth and, in this case, the distance is limited by the fibre
bandwidth.
An electrical signal configuration using a single line for each signal
referenced to a ground path common to the other signal lines. The
advantage of single-ended configuration compared to differential is in
using less circuitry and PCA area. Its disadvantage is higher vulnerability
to common mode noise and limited cable distance.
A slot is the place within the cartridge storage area where the media is
placed. Each slot has a reference position, i.e. position 1 through position
18.
Simple Network Management Protocol.
Glossary 109