Product Fault Management,
Continued
Correctable
Memory Error
Entries
Correctable memory error entries have a memory (single-bit error)
SBE reduction subpacket (Figure 5–13). This subpacket, unlike
all others, is of variable length. It consists solely of software
registers from state maintained by the error handler, as well as
hardware state transformed into a more usable format.
Figure 5–13 Memory SBE Reduction Subpacket (Correctable
Memory Errors)
3 1
0 0
Memory SBE Reduction Subpacket
CRD Entry Subpacket Header
CRD Entry #1
CRD Entry #2
.
.
.
CRD Entry n
Max n = 16
MLO-007267
Correctable
Reset Data
Buffer
The VMS error handler maintains a correctable read data (CRD)
buffer internally within memory that is flushed asynchronously
for high-level events to the error log file. The CRD buffer and
resultant error log entry are maintained and organized as follows:
Each entry has a subpacket header (Figure 5–14) consisting
of LOGGING REASON, PAGE MAPOUT CNT, MEMCON,
VALID ENTRY CNT, and CURRENT ENTRY. MEMCON
contains memory configuration information, but no error
status as is done for the memory subpacket.
Continued on next page
5–65
