On Wed, 5 Apr 2000, Richard B. Johnson wrote:
...
> Well. It may be useless on most modern RAM. I haven't seen any
> RAM, rated at 100MHz or higher (P100) that even has the extra bit.
any nontrivial vendor will supply you with Nx72b dimms.
> None of the PC stuff ever corrected RAM errors with a CRC, even though
nonsense. the BX chipset, for instance, most definitely supports SECDED;
see section 3.3.28 in the datasheet. I believe the LX did as well,
and the HX back in the P5 era. RDRAM seems to be _only_ available in ECC.
> ECC RAM just accumulated bits from multiple columns to save parity
> bits. It still hit MNI when it detected an error. Alpha and Suns
BX is normally configured (if ECCing) to report only uncorrected errors.
there's a chipset register to report the problem address, and you can
tell it to report even corrected, single-bit errors. AFAIK none of this
is touched by Linux.
regards, mark hahn.
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This archive was generated by hypermail 2b29 : Fri Apr 07 2000 - 21:00:15 EST