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From: Ivan Voras <ivoras@freebsd.org>
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Subject: Re: DELL R200 afd0?/geom panic
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Luiz Otavio O Souza wrote:
> I'm running current (from beta-1 to head) in this system and looks like 
> the virtual floppy support is breaking geom somehow.
> 
> Sometimes the system boots fine, but normally after a reboot the system 
> refuses to boot again with this panic:
> 
> (a few more errors from afd0)
> afd0: FAILURE - READ_CAPACITY_RESERVED asc=0x0d ascq=0xbf
> afd0: FAILURE - TEST_UNIT_READY ABORTED COMMAND asc=0x09 ascq=0x3f
> panic: g_read_data(): invalid length 4174017282
> 
> (hand transcribed again...)
> 
> The length isn't fixed (i see a different value every time).
> 
> Does anyone knows how to disable the support for this device (afd0) ? I 
> don't care about it...
> 
> I'll appreciated any suggestions.

I don't know about the specifics but it looks like it might be a part of 
the IPMI remote management or a similar system. Try looking at remote 
console configuration.