Adaptec 2842 (AIC-7XXX) difficulties cache related?

Matthias Andree (mandree@sx1.HRZ.Uni-Dortmund.DE)
Sun, 7 Jun 1998 00:44:57 +0200 (CEST)


Fiddling a little bit with my AIC-7xxx based Adaptec 2842VL (Fast-SCSI, that
is) and several Linux versions (2.1.101, 2.0.33, 2.0.34), I tried several
setups and also suffered from trouble with the machine not booting,
sometimes not even from BIOS (I have a SCSI-only machine here).

After having a look at the 2842 documentation, I figured the 2842 requires a
"J5 jumper block setting" for machines that do write-back caching, but I
cannot find J5 anywhere on my 2842 board.

Now, setting my L2 cache to Write-Through worked around my "does not boot"
difficulties. This is not really Kernel-related, but might be worth a try if
someone is suffering from "cannot catch Oops since machine does not boot".

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