DEC DECstation 5000 Model 100 Series, Maintenance Manual

Page: 247 / 269

SCSI Buffer Test
The SCSI buffer test checks the SCSI buffer’s operation. To run
the SCSI buffer test, type x12 P1 P2 and press Return.
When you type this command,
Replace x with the unit number of the SCSI controller you
want to test.
Replace the optional parameter P1 with the address at
which you want the test to start.
Replace the optional parameter P2 with the increment by
which you want the next test pass’s starting address to
increase.
SCSI buffer test parameters and error codes
Table F-54 describes the parameters used in SCSI buffer test
commands and error messages. Table F-55 lists error codes
used in SCSI buffer test error messages.
Table F-54. SCSI Buffer Test Parameters
Parameter Description
P1 Test’s starting address.
P2 Increment by which each test pass’s starting address
increases.
Table F-55. SCSI Buffer Test Error Codes
Error Code Description
1 Write to SCSI RAM failed.
2 Read and write values from first pass did not match.
3 Read and write values from second pass did not match.
Test Commands and Messages Produced by Version PDE3 ROM Chips F–41