FreeBSD 9.0 and Intel MatrixRAID RAID5

[Alexander Motin]

On 17.01.2012 12:53, Alexander Pyhalov wrote:
> On my desktop I use Intel MatrixRAID RAID5 soft raid controller. RAID5
> is configured over 3 disks. FreeBSD 8.2 sees this as:
>
> ar0: 953874MB <Intel MatrixRAID RAID5 (stripe 64 KB)> status: READY
> ar0: disk0 READY using ad4 at ata2-master
> ar0: disk1 READY using ad6 at ata3-master
> ar0: disk2 READY using ad12 at ata6-master
>
> Root filesystem is on /dev/ar0s1.
> Today I've tried to upgrade to 9.0.
> It doesn't see this disk array. Here is dmesg. When I load geom_raid, it
> finds something, but doesn't want to work with RAID:
>
> GEOM_RAID: Intel-e922b201: Array Intel-e922b201 created.
> GEOM_RAID: Intel-e922b201: No transformation module found for Volume0.
> GEOM_RAID: Intel-e922b201: Volume Volume0 state changed from STARTING to
> UNSUPPORTED.
> GEOM_RAID: Intel-e922b201: Disk ada2 state changed from NONE to ACTIVE.
> GEOM_RAID: Intel-e922b201: Subdisk Volume0:2-ada2 state changed from
> NONE to ACTIVE.
> GEOM_RAID: Intel-e922b201: Disk ada1 state changed from NONE to ACTIVE.
> GEOM_RAID: Intel-e922b201: Subdisk Volume0:1-ada1 state changed from
> NONE to ACTIVE.
> GEOM_RAID: Intel-e922b201: Disk ada0 state changed from NONE to ACTIVE.
> GEOM_RAID: Intel-e922b201: Subdisk Volume0:0-ada0 state changed from
> NONE to ACTIVE.
> GEOM_RAID: Intel-e922b201: Array started.
>
> No new devices appear in /dev.
> How could I solve this issue?

ataraid(4) had mostly read-only support for RAID5 because it doesn't 
update parity data. I haven't thought anybody really using it in such 
condition. That's why geom_raid doesn't support RAID5 now at all.

-- 
Alexander Motin