Compaq AlphaServer ES40 User Manual

Error Logs 5-13
Table 5–1 Compaq AlphaServer ES40 Fault Detection and Correction
Component Fault Detection/Correction Capability
Alpha 21264 (EV6)
microprocessor
Contains error checking and correction (ECC)
logic for data cycles. Check bits are associated
with all data entering and exiting the
microprocessor.
A single-bit error on any of the four longwords
being read can be corrected (per cycle). A
double-bit error on any of the four longwords
being read can be detected (per cycle).
Backup cache (B-cache)
ECC check bits on the data store, and parity on
the tag address store and tag control store.
Memory DIMMs ECC logic protects data by detecting and
correcting data cycle errors. A single-bit error
on any of the four longwords can be corrected
(per cycle). A double-bit error on any of the four
longwords being read can be detected (per
cycle).
PCI SCSI controller
adapter
SCSI data parity is generated.

Compaq AlphaServer ES40 Specifications

General

Brand	Compaq
Model	AlphaServer ES40
Category	Server
Language	English