Compaq AlphaServer 1200 User Manual page 163

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SCSI controller information — Describes the physical characteristics of the
selected SCSI controller. This line includes:
Controller — Brand and model of SCSI chip used on the SCSI controller.
Controller number — Based on the number of SCSI controllers of a particular
type in the system. The first controller of a type is always numbered 0.
SCSI ID number — A unique number assigned to the SCSI controller. The
standard scheme in numbering controllers is for controllers to be SCSI ID 7.
SCSI bus number — Indicates if the controller is first or second in the system.
The first controller is tied to SCSI bus 0, and the second to SCSI bus 1.
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SCSI ID — A unique number you assign to each SCSI device in the system.
This is usually done with jumpers or a thumb wheel attached to the drive
housing.
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Device type — Displays whether the device is a hard disk, CD-ROM, scanner,
or other type.
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Size — The raw capacity of the drive. Formatting the drive with different file
systems (for example, FAT and NTFS) may result in different usable sizes
because of differences in the way those file systems manage storage. This field
is left blank if it is not applicable to a device (for example, a scanner).
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Description — The name and model of the d evice as recorded in the device's
firmware.
AlphaBIOS Console 5-17