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From: "Claude B." <cbaud@laposte.net>
To: freebsd-questions@freebsd.org
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Date: Sat, 11 Dec 2004 14:54:02 +0000
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Subject: PDC20319 4 ports SATA and the RAID1
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Here the reply from Søren Schmidt freebsd-current@freebsd.org:

Le sam 11/12/2004 à 12:19, Søren Schmidt a écrit :
> Claude B. wrote:
> 
>  kernel: atapci0: <Promise PDC20319 SATA150 controller> port
>  0xb400-0xb47f,0xb800-0xb80f,0xbc00-0xbc3f mem
>  0xfc960000-0xfc97ffff,0xfc99f000-0xfc99ffff irq 27 at device 5.0 on
pci2
>  kernel: atapci0: failed: rid 0x20 is memory, requested 4
>  kernel: ata2: channel #0 on atapci0
>  kernel: ata3: channel #1 on atapci0
>  kernel: ata4: channel #2 on atapci0
>  kernel: ata5: channel #3 on atapci0
>  
>  What means this kernel message :"atapci0: failed: rid 0x20 is memory,
>  requested 4" and how to make sure the RAID1 works fine?
 
Its just a warning from the kernel (which IMHO shouldn't be there).
The reason is that "normal" ATA controllers has port space there and
the  generic part of ATA probes it as part of the generic probe code.
Later  in the probe where ATA knows it deals with a Promise chip it also
knows  how to use that resource as memory space.