Re: XLT366 Memory Compatiblity...

[Jan-Benedict Glaw <jbglaw@lug-owl.de>]

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On Tue, 2004-06-08 05:46:54 -0600, Ryan Kirkpatrick <linux@rkirkpat.net>
wrote in message <Pine.LNX.4.21.0406080536550.13212-100000@magellan.rkirkpat.net>:
> 16Mbit in size. The SIMMs are parity (from the chip count). There is also

So they have an extra parity bit...

> a sticker on one of chips that has '3163667/23BT S023039 64MB'. I was told
> they came out of a Compaq Proliant server (don't know the model). All of
> this seems to indicate they _should_ be compatible with the XLTs.
> 
> One XLT366 is able to post AlpahBIOS with either four or eight of these
> SIMMs installed, and the memory count is either 256MB or 512MB
> respectively. Yet, when I boot Linux, I get an endless stream of ECC
> errors and corrections, slowing the system down so badly Linux is never
> able to fully boot. AlphaBIOS version is 5.66.

...but ECC requires more than one:)

> Lastly, I tested them in a Sparc LX (which also takes 72pin parity
> SIMMs). I installed the maximum of six SIMMs (384MB), and it was able to
> see the maximum 96MB it supports. Furthermore it was able to boot and run
> Linux without issue. It appears that as long as the SIMMs are not fully
> utilized they work fine. When fully utilized, they just don't work.

As I said, parity != ECC.

MfG, JBG

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