Promise TX2 Rebuild via atacontrol??

Edgar Martinez emartinez at
Tue Apr 5 08:20:33 PDT 2005

I apologize...I usually am the one complaining to others about bad...

I do not think that the drive is at fault as much as the controller. I have
had to deploy well over one hundred of the exact same configuration, and
historically, it's always been the controller that just drops the drive for
some reason. I usually end up re-mirroring the array on the old "dead" drive
and the system will continue on its merry way (last one is over 1 year old
since last resync)...hence you see why I am curious if I could just use
atacontrol instead of taking the unit offline and spending 45min waiting for
the resync....

######## TECHNOJARGON BELOW ######## 

Promise TX2 Orig BIOS

ad4: 114473MB <WDC WD1200JB-00DUA3/75.13B75> [232581/16/63] at ata2-master

ad6: 114473MB <WDC WD1200JB-00DUA3/75.13B75> [232581/16/63] at ata3-master

ar0: 114440MB <ATA RAID1 array> [14589/255/63] status: READY subdisks:
 disk0 READY on ad4 at ata2-master
 disk1 READY on ad6 at ata3-master

Mounting root from ufs:/dev/ar0s1a

ad4: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=5861119
ad4: FAILURE - WRITE_DMA timed out
ar0: WARNING - mirror lost

-----Original Message-----
From: Emanuel Strobl [mailto:emanuel.strobl at] 
Sent: Tuesday, April 05, 2005 4:15 AM
To: freebsd-questions at; emartinez at
Subject: Re: Promise TX2 Rebuild via atacontrol??

Am Montag, 4. April 2005 23:29 schrieb Edgar Martinez:
> All,
> I have a failed member in a RAID1 array and using atacontrol can see that
> the status is degraded. I am curious if I can use atacontrol to rebuild
> array if the original array was built using the Promise BIOS utility. If I
> tell atacontrol to rebuild.will it corrupt my data or catch fire and
> explode??

You don't tell us what version you use, but promise is supported very well, 
even in atamkII in 6-current.
If you replace the failed drive it sould be automatically rebuilt, the 
`atacontrol rebuild ar0` doesn't work as long as you (in 5.x) used
or the controller found a good "spare" drive.
In 4.x you don't have the addspare option, you have to `atacontrol detach 3`

and reattach it the same way to get recognized and inserted as spare in an 
existing array.


> Cheers!
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