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Date:      Fri, 07 Sep 2001 11:16:33 GMT
From:      Neil Darlow <neil@darlow.co.uk>
To:        freebsd-questions@freebsd.org
Subject:   UDMA question
Message-ID:  <20010907.11163300@ideal.darlow.co.uk>

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Hi All,

I have upgraded my FreeBSD 4.3-RELENG_4_3 system to the following:

  /dev/ad0  - UDMA/66 drive
  /dev/ad2  - UDMA/66 drive
  /dev/acd0 - UDMA/33 cdrom

The cdrom drive is slave to /dev/ad0 and bios says it's in PIO4.

The system runs fine but /dev/ad0 drops to UDMA/33 operation which I
assume is caused by the presence of the cdrom.

Is there any way I can restore UDMA/66 operation to /dev/ad0 with the
setting of driver flags etc?

Please don't say remove the cdrom and, yes, UDMA/66 cables are used
for both drive chains.

Regards,
Neil Darlow.
--
1024D/531F9048 1999-09-11 Neil Darlow <neil@darlow.co.uk>
GPG fingerprint =3D 359D B8FF 6273 6C32 BEAA  43F9 E579 E24A 531F 9048


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