Sun Microsystems SUN STOREDGETM 5310 NAS - Manual (Page 342)

7-6 Sun StorEdge 5310 NAS Troubleshooting Guide • December 2004
3. Rotate the bezel towards the front.
4. Remove the bezel by pressing the hinges in and pulling it out.
FIGURE 7-3 Sun StorEdge 5310 NAS Expansion Unit
7.6.2 Memory
Caution – Before touching or replacing any component inside the server, disconnect
all external cables and follow the instructions in “Safety: Before You Remove the
Cover” on page 7-2 and “Removing and Replacing the Cover” on page 7-2. Always
place the server on a grounded ESD pad and wear a properly grounded antistatic
wrist strap.
The main board supports DDR-266 compliant registered ECC DIMMs operating at
266 MHz.
Each system contains four registered one gig DIMMS.
ECC single-bit errors are corrected and multiple-bit errors are detected.
■ Single bit error correction: If a single bit error is detected, the ECC logic generates
a new “recovered” 64 bit QWord with a pattern that corresponds to the originally
received 8 bit ECC parity code. The corrected data is returned to the requestor
(the processor or PCI master).
■
Multiple-bit error detection: Additional errors within the same QWord constitute
a multiple-bit error, which is unrecoverable. When a multiple-bit memory error is
detected, a non-maskable interrupt (NMI) is issued that instructs the system to
shut down to avoid data corruption. Multiple-bit errors are very rare.
Note – NMI is not currently supported.