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- p: programmed
I/O
option
When this option is selected, all data I/O takes place
in the programmed I/O mode.
If the option is not used,
all SCSI bus data I/O is carried out in the DMAC mode.
Therefore, if the SCSI/Hard Disk command can be run
successfully with the -p option but generates an error
without it, tne DMAC should be suspected.
-nd: no disk option
This option allows checking of the system unit SCSI
controller only.
It is used if no hard disk drive is
present or if the open channel test was terminated with
an error.
If there are no errors when this option is
specified, but errors are generated when no options or
the -p option is used, either the SCSI controller or the
hard disk drive may be bad.
diag> scsi -v
SCSI/HARD DISK CHECK:
Open Channe
1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OK
Vender ID
CDC
(•)
Model name
: WRENS-Half Heifht
(*)
Rev. level
: 5457
(•)
Buffer size inquiry ..•...•................. OK
Buffer size : 32768 bytes
(•)
Data write • . . . • . . . • . • . • • • • . • . . . . . . . . • . . . . • . OK
Data read • . . • • • . • . . . . • . . . • . . • . . . . . . . • . . . . . • OK
Data verify • . . • • . . • . . . . . • . . . . • . . . . . . . • . . . . . OK
DISK read first 1 block .••.•.•••...•....•.. OK
dia.g>
!! -nd
scsi -v -nd
SCSI CHECK:
Initialize CID-1180 ........................ OK
Bus control for Initiator .................. OK
Bus control for Target ..................... OK
Interrupt . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OK
diag>
*
D1iiers uepending on model and version number.
NWS-1510/1530/1580
4-15
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