Silicon Graphics CHALLENGE CMN A012B, Owner'S Manual

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New Addressing Scheme for Drives
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Addressing Drives Using the PROM
The previous PROM drive addressing format remains in place; for example:
dksc(a,b,c)
where a represents the SCSI bus number, b refers to the drive number, and c
refers to the drive’s partition number. The dksc designation is the monitor’s
name for SCSI.
Note:
The PROM can address only the master IO4 board in a system. In a
deskside system, the master IO4 resides in either slot 3 (Onyx) or slot 5
(CHALLENGE). In a rackmount system, the master IO4 resides in slot 15. If
you need to address a drive connected to another IO4 board, you must do so
under IRIX.
Addressing Drives Under IRIX
Under IRIX, the addressing scheme has changed as shown in the following
new format:
/dev/dsk/dksSSSdDsP
where /dev/dsk references the IRIX file directory of the drives and dks
designates SCSI. The SSS designator represents the slot number of the IO4
board and/or the SCSI bus number (see Note below), dD refers to the drive
number, and sP refers to the drive’s partition number.
Note:
If you are addressing a drive on the master IO4 board system, you
need to specify only the applicable SCSI bus number. If you are addressing a
drive on another IO4 board, you must specify both the slot number of the
board and the applicable SCSI bus number.
If, for example, you are addressing a drive connected to an IO4 board in slot
4 and SCSI bus number 5 (on a deskside system), the
SSS number would be
45.
With the earlier IO3 boards, the software required only single digits to
differentiate drives; however, with the IO4 and new version of the software,
the SCSI bus or
SSS number can contain up to three digits. If SSS is a two- or