Not recognizing raid controller Adaptec AIC7901

[enid]

Hi all,

I'm having some problems installing FreeBSD on my Supermicro server 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
cd,
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.
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[Justin T. Gibbs-3]

enid vx wrote:
> Hi all,
>
> I'm having some problems installing FreeBSD on my Supermicro server equipped
> with :
>
> Single channel Adaptec® AIC-7901 controller for Ultra320 SCSI
> Host RAID 0, 1, 10 support

...

> the problem is when I try to install FreeBSd from the installer cd, it shows
> only the separated disks.

The Adaptec U320 controllers have no built-in support for RAID.  SW RAID
support is provided by the BIOS and the windows drivers.  Unfortunately
FreeBSD does not support the Adaptec SW RAID meta-data, hence the disks
are reported individually instead of as a single volume.

--
Justin
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[enid]

Thank you for answering,

So if I have no possibility to install FreeBSD on aic-7901, but I want to
use RAID can I user mirroring with gmirror.
Is this a good idea, can you give me an advice how to add redundancy to my
data.

Also is there a plan in the future to support this kind of controller?

Enid

On Tue, Oct 6, 2009 at 2:37 PM, Justin T. Gibbs <gibbs@...> wrote:

> enid vx wrote:
>
>> Hi all,
>>
>> I'm having some problems installing FreeBSD on my Supermicro server
>> equipped
>> with :
>>
>> Single channel Adaptec® AIC-7901 controller for Ultra320 SCSI
>> Host RAID 0, 1, 10 support
>>
>
> ...
>
>  the problem is when I try to install FreeBSd from the installer cd, it
>> shows
>> only the separated disks.
>>
>
> The Adaptec U320 controllers have no built-in support for RAID.  SW RAID
> support is provided by the BIOS and the windows drivers.  Unfortunately
> FreeBSD does not support the Adaptec SW RAID meta-data, hence the disks
> are reported individually instead of as a single volume.
>
> --
> Justin
>

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