User`s guide

System Troubleshooting and Diagnostics
5.2 Product Fault Management and Symptom-Directed Diagnosis
Example 5–5 Using ANALYZE/SYSTEM to Check the Physical Address in
Memory for a Replaced Page
$ ANALYZE/SYSTEM
VAX/OpenVMS System analyzer
SDA> SHOW PFN /BAD
Bad page list
-------------
Count: 1
Lolimit: -1
High limit: 1073741824
PFN PTE ADDRESS BAK REFCNT FLINK BLINK TYPE STATE
---- ----------- -------- ------ ----- ----- ---------- ----------
0005FFB8 00000000 00000000 0 00000000 00000000 20 PROCESS 02 BADLIST
SDA> EVAL 5ffb8 * 200
Hex = 0BFF7000 Decimal = 201289728
SDA> EXIT
$
5.2.6.2 Correctable ECC Errors
Refer to Example 5–6, which provides an error log showing correctable ECC
errors.
For correctable ECC errors, a Single-Bit Error (SBE) Memory Subpacket will
be logged as indicated by "memory sbe reduction subpacket" listed in the third
column of the FLAGS software register ( ).
The Memory SBE Reduction Subpacket header contains a CURRENT ENTRY
register ( ) that displays the number of the Memory CRD Entry that caused
the error notification. If CURRENT ENTRY > 0, examine which bits are set in
the STATUS register ( ) for this entry—GENERATE REPORT should be set.
Note
If CURRENT ENTRY = 0, then the entry was logged for something
other than a single-bit memory correctable error Footprint. You will
need to examine all of the Memory CRD Entries and Footprints to try
to determine the likely FRU.
Check for the following:
• SCRUBBED ( )—If SCRUBBED is the only bit set in the STATUS
register, memory modules should NOT generally be replaced.
5–22 System Troubleshooting and Diagnostics