Answer Posted / dillip palai
SCSI - Small Computer System Interface
SCSI is an industry standard system interface, which allows
multiple peripheral devices to be installed on the system.
The number of devices that can be installed depends on the
type of SCSI Host adapter that you have installed in your
system. Most SCSI systems have an older "Narrow" 8-bit SCSI
host adapter, which have 8-bit data paths and allow for up
to 7 devices to be installed on the same channel. Newer
"Wide" Host adapters have 16-bit wide data paths and provide
support for up to 15 devices.
A SCSI ID is a unique identifier assigned to each SCSI
device on the bus. It determines the SCSI device's priority.
There are 16 IDs, ranging from 0 to 15. The order of the
priorities is a bit unusual. From highest priority to lowest
they are: 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12 ,11, 10, 9,
8. ID 7 is almost always reserved for the SCSI Host Adapter.
The other IDs are free to be assigned as desired, although
your computer may have assigned them automatically.
Never assign the same ID to more than one device
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