DEC 4000 AXP Service Manual page 5

4 Error Log Analysis
Fault Detection and Reporting . . . . . . . . . . . . . . . . . . . . . .
4.1
Machine Check/Interrupts . . . . . . . . . . . . . . . . . . . . . .
4.1.1
4.1.2 System Bus Transaction Cycle . . . . . . . . . . . . . . . . . . .
4.2 Error Logging and Event Log Entry Format . . . . . . . . . . .
4.3 Event Record Translation . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.1 OpenVMS AXP Translation . . . . . . . . . . . . . . . . . . . . .
DEC OSF/1 Translation . . . . . . . . . . . . . . . . . . . . . . . .
4.3.2
Interpreting System Faults Using ERF and UERF . . . . . .
4.4
4.4.1 Note 1: System Bus Address Cycle Failures . . . . . . . .
4.4.2 Note 2: System Bus Write-Data Cycle Failures . . . . . .
4.4.3 Note 3: System Bus Read Parity Error . . . . . . . . . . . .
4.4.4 Note 4: Backup Cache Uncorrectable Error . . . . . . . . .
Note 5: Data Delivered to I/O Is Known Bad . . . . . . . .
4.4.5
Note 6: Futurebus+ DMA Parity Error . . . . . . . . . . . .
4.4.6
4.4.7 Note 7: Futurebus+ Mailbox Access Parity Error . . . .
4.4.8 Note 8: Multi-Event Analysis of Command/Address
Parity, Write-Data Parity, or Read-Data Parity
Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sample System Error Report (ERF) . . . . . . . . . . . . . . .
4.4.9
Sample System Error Report (UERF) . . . . . . . . . . . . .
4.4.10
5 Repairing the System
5.1 General Guidelines for FRU Removal and Replacement . .
Front FRUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2
Operator Control Panel . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1
5.2.2 Vterm Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.3 Fixed-Media Storage . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.3.1 3.5-Inch Fast-SCSI Disk Drives (RZ26, RZ27,
RZ35) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5-Inch SCSI Disk Drives . . . . . . . . . . . . . . . . . . .
5.2.3.2
5.2.3.3 5.25-Inch SCSI Disk Drive . . . . . . . . . . . . . . . . . . .
5.2.3.4 SCSI Storageless Tray Assembly . . . . . . . . . . . . . .
5.2.3.5 3.5-Inch DSSI Disk Drive . . . . . . . . . . . . . . . . . . . .
5.2.3.6 5.25-Inch DSSI Disk Drive . . . . . . . . . . . . . . . . . . .
DSSI Storageless Tray Assembly . . . . . . . . . . . . . .
5.2.3.7
Removable-Media Storage (Tape and Compact
5.2.4
Disc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.4.1 SCSI Bulkhead Connector . . . . . . . . . . . . . . . . . . .
5.2.4.2 SCSI Continuity Card . . . . . . . . . . . . . . . . . . . . . .
5.2.5 Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1
4-2
4-4
4-4
4-6
4-6
4-7
4-7
4-12
4-13
4-14
4-14
4-15
4-15
4-16
4-16
4-16
4-18
5-1
5-4
5-4
5-4
5-4
5-4
5-5
5-6
5-6
5-7
5-7
5-8
5-8
5-8
5-8
5-9
vii