atacontrol rebuild and iostat

Hmm, another notice...
I created array, right now it's rebuilding

atacontrol status ar0
ar0: ATA RAID1 subdisks: ad4 ad6 status: REBUILDING 3% completed

to check is it really doing what I expect I run
iostat ad4 ad6 1
and I see 0 transfer to devices:
pilkis_at_freebsd:/usr/src# iostat ad4 ad6 1
      tty             ad4              ad6             cpu
 tin tout  KB/t tps  MB/s   KB/t tps  MB/s  us ni sy in id
   1 1219  0.50   0  0.00   0.50   0  0.00  17  0  6  1 76
   0  180  0.00   0  0.00   0.00   0  0.00   0  0  2  3 96
   0   60  0.00   0  0.00   0.00   0  0.00   0  0  2  2 97
   0   60  0.00   0  0.00   0.00   0  0.00   0  0  2  2 95
   0   60  0.00   0  0.00   0.00   0  0.00   0  0  0  0 99
   0   60  0.00   0  0.00   0.00   0  0.00   1  0  1  2 96

to be sure what I didn't miss something I also run
iostat ar0
also no transfers 0.00MB/s

Why nothing ?


----- Original Message ----- 
From: "Doug White" <dwhite_at_gumbysoft.com>
To: "Putinas Piliponis" <putinas.piliponis_at_icnspot.net>
Cc: <current_at_freebsd.org>
Sent: Tuesday, February 03, 2004 00:36
Subject: Re: atacontrol problems


> On Mon, 2 Feb 2004, Putinas Piliponis wrote:
>
>> just playing with raids on 5.2.1-RC
>> atacontrol create RAID1 ad6 ad6
>> ar0 created
>> atacontrol detach 3
>> gives panic
>
> Feeding invalid configurations to ATA RAID is a good way to end up with a
> bloody foot.  It would be nice to sanity-check something like that,
> though.
>
> ATARAID is known to not be wonderfully stable in the face of bizarre
> setups and failure; its a known limitation. The future plan is to replace
> the current framework with something more robust.
>
> -- 
> Doug White                    |  FreeBSD: The Power to Serve
> dwhite_at_gumbysoft.com          |  www.FreeBSD.org
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>