From owner-freebsd-alpha  Wed Dec  4  1:59:29 2002
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Reply-To: "alex" <lex@adelaide.on.net>
From: "alex" <lex@adelaide.on.net>
To: <alpha@freebsd.org>
Subject: UDMA ICRC error reading fsbn 78165297
Date: Wed, 4 Dec 2002 09:13:02 +1030
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Hi all,

I have installed a Promise TX2 Ultra ATA/100 controller into my Alpha pws
500au.
The kernel seems to probe and attach a driver to the device:

/var/run/dmesg.boot

....
atapci1: <Promise TX2 ATA100 controller> port
0x8100-0x810f,0x8110-0x8113,0x8120-0x8127,0x8130-0x8133,0x8140-0x8147 mem
0x80914000-0

However, further into the process of booting, when the ATA driver is
attached to ad0 I get these errors:

Timecounter "alpha"  frequency 499864662 Hz
ad0: UDMA ICRC error reading fsbn 78165297 of 0-3 (ad0 bn 78165297; cn 77544
tn 15 sn 0) retrying
ad0: UDMA ICRC error reading fsbn 78165297 of 0-3 (ad0 bn 78165297; cn 77544
tn 15 sn 0) retrying
ad0: UDMA ICRC error reading fsbn 78165297 of 0-3 (ad0 bn 78165297; cn 77544
tn 15 sn 0) retrying
ad0: UDMA ICRC error reading fsbn 78165297 of 0-3 (ad0 bn 78165297; cn 77544
tn 15 sn 0) falling back to PIO mode
ad0: 38166MB <WDC WD400JB-00ENA0> [77545/16/63] at ata3-master PIO4

I'm worried about the line "falling back to PIO mode". Does this mean that
ad0 is running at ATA33 ?

I'm not sure if or how the ATA disk and ATA controller are related to
causing the ATA disk to go into PIO mode.

Can anyone sugest a solution to get the disk to usemode rather than PIO mode
?

Thanks

 - aW




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