Compaq AlphaServer ES40 Technické informace stáhnout pdf (Strana 421)

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101

Isolating Failing DIMMs E-5

Use the following table to determine the proper set. Bits<27,28,29,30,31,32>

are from the failing address.

Configuration Type Bits <7:4> from DPR

Array

Size

4 & 5 9 D & F

256MB Lower Set Upper Set Bit <27> == 0 – Lower Set, 1– Upper Set

512MB Lower Set Upper Set Bit <28> == 0 – Lower Set, 1– Upper Set

1GB Lower Set Upper Set Bit <29> == 0 – Lower Set, 1– Upper Set

2GB Lower Set Upper Set Bit <30> == 0 – Lower Set, 1– Upper Set

4GB Lower Set Upper Set Bit <31> == 0 – Lower Set, 1– Upper Set

8GB Lower Set Upper Set Bit <32> == 0 – Lower Set, 1– Upper Set

Now that you have the real array, the failing Data/Check bits, and the

correct set, use Table E–4 to find the failing DIMM or DIMMs.

The table shows data bits 0–255 and check bits 0–31. These data bits indicate a

single-bit error. An SROM compare error would yield address and data bits

from 0–63. When you convert the address to be in the correct range, the failing

data would be somewhere between 0 and 255.

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