Not recognizing raid controller Adaptec AIC7901

Jason jhelfman at
Fri Jul 31 17:36:50 UTC 2009

You may want to try using the Adaptec drivers from Adaptec, and not the
native freebsd drivers.

Edit /boot/loader.conf, and that may be it.

I've found great success with them.


On Fri, Jul 31, 2009 at 06:39:56PM +0200, enid vx thus spake:
>Hi all,
>I'm having some problems installing FreeBSD 6.3 on my machine equipped with
>Single channel Adaptec? AIC-7901 controller for Ultra320 SCSI
>Host RAID 0, 1, 10 support
>I have 4 disks which are configured in 2 Raid1,
>the problem is when I try to install FreeBSd from the installer cd, it shows
>only the separated disks.
>I've added also ahd_load="YES" into /boot/loader.conf on the installation
>also on the boot prompt
>load ahd
>load ahd.ko
>and then boot
>but again with no success .
>It were recognized only the 4 disks as separated.
>How can I make it recognize the raid ?
>Thanks in advance.
>freebsd-questions at mailing list
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