atacontrol Raid, cannot re-add member to array

Conrad Burger conrad.burger at swistgroup.com
Tue Jun 29 04:40:41 PDT 2004


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Hi all,

I'm investigating atacontrol raid as an alternative to vinum.
So far it has worked great.

That's until I unplugged one of the array members.
The system boots up fine from the second disk, 
but the problem ... I can't get atacontrol to rebuild the mirror onto the disk
that was removed. 

I have tried every command on the atacontrol man page, but to no avail.

OS : FreeBSD 4.10 
System : P3
IDE controller : Intel ICH2 ATA100 controller 
and 2 x 40 GB disks.

On FreeBSD 5  atacontrol has an additional command "addspare" that I have used
with success to 
add a disk to a RAID1 array and rebuild it.

Now that you know some of the details,
here are the questions
1.. How "safe" is the atacontrol raid feature? 
2.. How do I rebuild an atacontrol RAID1 array on FreeBSD 4.10?


Any help would be appreciated, I have been at it the whole day!

Regards 
Conrad Burger 
Support Engineer 
TEBiVO Business Continuity 
Cell: +27 82 442 8760 
conrad[at]tebivo[dot]com 
Tel: +27 21 888 7956 Fax: +27 21 888 7979 
 

Click here to view our e-mail legal notice: 
http://www.tebivo.com/email.htm or call: +27 21 888 7920 



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