Re: BYTE Magazine Pentomino Article

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#621098

From: Scott Lurndal
Date: Wed, 07 Mar 2018 14:13

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Jorgen Grahn <grahn...@snipabacken.se> writes:
>On Tue, 2018-03-06, Mike Spencer wrote:
>...
>> Digressing here, the IBM P4 has an odd quirk.  It came with an IDE HD
>> but has mobo plugs for 2 SATA drives.  After a HD failure, I used one
>> mobo plug for a new SATA drive.  Works but there's something weird
>> with the handling of large (say, 1G+) transfers.  CPU bogs down enough
>> to make the (Linux K2.4, X twm but no desktop) console unresponsive
>> for many seconds at a time.  Never managed to figure it out.

I would guess that the BIOS AHCI settings were set to treat the
SATA drive as a legacy IDE drive, and thus DMA wasn't being used.

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Subject: Re: BYTE Magazine Pentomino Article
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