Problems with PCI RAID installation on FreeBSD 4.8

Jason Stewart jstewart at
Thu Aug 21 08:22:52 PDT 2003

Christopher Raven wrote:

> Hi,
> I am trying to install FreeBSD 4.8 onto an Intel ISP2150 that I have 
> ripped the SCSI cabling and boards from in place of a PCI RAID system. 
> All seems to have gone well and I can boot and configure the RAID card 
> locally (4x80GB). However, FreeBSD insists in seeing the RAID 
> (supposedly striped and mirrored) as 4 separate disks... ad4 -> 7.
> Is this correct? Do I need to change something here in FreeBSD as I 
> can't see anything obvious in the docs or from searching the web on this? 

It could be correct if you haven't set up your RAID card correctly. Is 
it a hardware or software controlled RAID card. If it's hardware 
controlled, you have to set up your RAID configuration in the card so 
FreeBSD recognizes it as 1 disk. If it's software controlled, cou can 
use something like ccd or vinum.
See this articles for more info on vinum:
Or the RAID section from the trusty handbook:

Good Luck,

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