Can't *write* to a hard disk, problem related to GEOM(4)?

[Søren Schmidt]

Julien Gabel wrote:
>>>/dev/ad10 was previously part of a hardware miror (ar(4) device with a
>>>HighPoint HPT374 (channel 2+3) UDMA133 controller), but since it was
>>>broken for an unknown reason, thid drive is no more usable, even alone.
>>>For example, I am not be able to create a new slice on it.
> 
> 
>>Could you try to compile a kernel without the ar(4) driver in it ?
>>It may still be latching on to this disk...
> 
> 
> Since the ar(4) driver is part of ata(4) generic ATA/ATAPI disk controller
> driver, I don't think it is possible to do that without shooting myself
> on the foot. Any ideas?

In -current and 5.something you can disable ATA RAID support by 
commenting out the "device ataraid" line.

-- 
-Søren