More SATA disk detection issues with MCP65 et al

[Johan Ihren <johani%johani.org@localhost>]

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As reported yesterday a fix was committed that forces ahcisata to  
attach to the Nvidia MCP65 as it doesn't work with viaide. So for so  
good, viaide doesn't work for me either with the MCP65.

My problem is that even with this fix there's a bit of randomness as  
to how many disks are detected, and particularly annoying is that if  
there is more than one disk attached then usually the last disk to be  
detected is completely wrongly matched. I.e. in a system with 4  
identical Seagate 160GB disks I get this:

...
ahcisata0 port 0: device present, speed: 1.5Gb/s
ahcisata0 port 1: device present, speed: 1.5Gb/s
ahcisata0 port 2: device present, speed: 1.5Gb/s
ahcisata0 port 3: device present, speed: 1.5Gb/s
wd0 at atabus0 drive 1: <ST3160023A>             # this is another  
disk, on an IDE bus, don't worry about it
wd0: ...
wd0: ...
wd1 at atabus1 drive 0: <ST3160827AS>            # first SATA disk
wd1: quirks 2<FORCE_LBA48>
wd1: 149 GB, 310101 cyl, 16 head, 63 sec, 512 bytes/sect x 31258108  
sectors
wd2: at atabus1 drive 0: <ST506>                 # second SATA disk
wd2: 69632 KB, 1024 cyl, 8 head, 17 sec, 512 bytes/sect x 139264 sectors
wd2d: device timeout reading fsbn 0 (wd1 bn 0; cn 0 tn 0 sn 0), retrying

and that's the end of it (we never get to wd3 and wd4). If I reboot  
without changing ANYTHING I sometimes get wd1, wd2 and wd3 correctly  
matched and then the bogus ST506 match on wd4 (and the same hang at  
"retrying" as above).

I've managed to get the system up with all four SATA disks attached a  
few times, but that is unusual, most attempts have ended with a hang  
at "retrying" on a wrongly matched disk "wdN" for varying values of "N".

Anyone else seen anything like this? Known problem? Any suggestions?

This is with i386 currrent as of an hour ago, i.e. 4.99.72 on an MSI  
K9N Neo V3, i.e. with an Nvidia MCP65.

Regards,

Johan


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