Sun Microsystems SPARCstation 4, Руководство по обслуживанию

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Chapter 4 Troubleshooting Procedures 4-7
a. If the disk drive responds and a message is displayed, the system SCSI
controller has successfully probed the devices.
This indicates that the system board is working correctly.
b. If a disk doesn’t respond:
i. Make sure that every SCSI disk and other SCSI devices on the SCSI bus
have a different SCSI target ID (see Appendix C).
Note –
The internal SCSI hard drive is automatically assigned target 3.
ii. Verify that all SCSI cables and the SCSI terminator are connected securely.
iii. Check the SCSI cables to make sure that there are no bent pins.
iv. If you still have not found the problem, replace the unresponsive drive.
v. If the problem still occurs after replacing the drive, replace the system
board.
vi. If the problem persists, replace the internal disk drive cable assembly.
4.4 Determining Faulty DSIMM Locations
The SunDiag System Exerciser and POST diagnostics can report memory errors
encountered during program execution. For general information about diagnostics,
see Chapter 2, “Troubleshooting Overview.” Memory error messages on the video
monitor usually indicate a physical memory address where the error was detected.
Depending on the diagnostic program you are running, a DSIMM location number
(“J” number) or a memory address may be displayed.
If the error message displays the location number, see
FIGURE 4-2
for DSIMM location
numbers in the SPARCstation 4 system and see
FIGURE 4-3
for DSIMM location
numbers in the SPARC Xterminal 1 system. If the error message displays a physical
memory address, consult
TABLE 4-4
to see which memory slot contains the physical
address for the SPARCstation 4 system and consult
TABLE 4-5
for DSIMM location
numbers in the SPARC Xterminal 1 system.
For example, if an error is detected at physical memory address 12fe958, examining
TABLE 4-4
shows that the error occurred in the DSIMM in slot 0.
After you have identified the defective DSIMM, follow the instructions in
Section 11.3.1 “Removing the DSIMM,” to remove the defective DSIMM. To replace
the DSIMM, follow the directions in Section 11.4.2 “Replacing the VSIMM.