Re: atacontrol and SATA RAID

Giovanni P. Tirloni wrote:
> Hi,
> 
>  I've a Intel SE7210TP1 motherboard with Adaptec HostRAID and I've 
> created a RAID1 array with 2 SATA disks using the following command:
> 
>   atacontrol create RAID1 ad4 ad6
> 
>  The system installed on /dev/ar0 just fine and I played a bit with 
> atacontrol detaching and attaching the disks.
> 
>  Detaching ad6 worked without problems with the following commands:
> 
>   atacontrol detach 3
>   atacontrol attach 3
>   atacontrol rebuild 0
> 
>  But when I tried to detach ad4 (after rebuilding array from previous 
> detachment) I got an error saying the array was broken. Now when booting 
> it shows this:
> 
>  ar0: 152627MB <ATA RAID1 array> [19457/255/63] status: DEGRADED subdisks:
>     disk0 READY on ad4 at ata2-master
>     disk1 DOWN no device found for this disk
> 
>  but atacontrol list shows ad6 there. So my question is: what's the 
> proper way of doing de attach/detach operation ?
> 

  I did a fresh install then turned the machine off and removed on 
disk. It booted again just fine. Then I turned it off again and 
inserted the disk I had removed. Now it will panic:

  panic: softdep_setup_inomapdep: found inode
  cpuid = 0
  boot() called on cpu#0
  Uptime: 2s

  If I removed the disk and boot again it will work and show the 
following message:

  ar0: 152627MB <ATA RAID1 array> [19457/255/63] status: DEGRADED 
subdisks:
  disk0 READY on ad4 at ata2-master
  disk1 DOWN no device found for this disk

  How can I replace a failed disk with this setup ? Given what I've 
read I'm not really using the controller's RAID support but only the 
RAID support present in the ata subsystem. Is that true ? In the BIOS 
I don't have any arrays.

Thank you,

-- 
Giovanni P. Tirloni