Re: atacontrol rebuild and iostat

but the hardware mirroring is disabled in bios ( Asus P4P800 deluxe ) ,
and I also have array from ad0 and ad2 disk, which are connected to normal 
ICH5 controller, also when rebuilding there is no i/o shown
there is no there mention about any raid support in them:

atapci0: <Intel ICH5 UDMA100 controller> port 
0xfc00-0xfc0f,0-0x3,0-0x7,0-0x3,0-0x7 at device 31.1 on pci0
atapci1: <Intel ICH5 SATA150 controller> port 
0xef90-0xef9f,0xefa8-0xefab,0xefa0-0xefa7,0xefac-0xefaf,0xefe0-0xefe7 irq 18 
at device 31.2 on pci0

----- Original Message ----- 
From: "Cy Schubert" <Cy.Schubert_at_komquats.com>
To: "Putinas Piliponis" <putinas.piliponis_at_icnspot.net>
Sent: Tuesday, February 03, 2004 2:55 PM
Subject: Re: atacontrol rebuild and iostat


> In message <04cf01c3ea3f$56394960$0464a8c0_at_spotripoli.local>, "Putinas
> Piliponi
> s" writes:
>> 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 ?
>
> Iostat doesn't see the I/Os because RAID rebuilds occur within the
> controller, the I/Os are not initiated in the O/S nor any of its 
> utilities,
> therefore the FreeBSDS kernel doesn't see them. The O/S doesn't see the
> I/Os. Atacontrol see 3% because it specifically queries the controller for
> that information.
>
> This is true of all hardware RAID controllers and true of all operating
> systems.
>
>
> Cheers,
> --
> Cy Schubert <Cy.Schubert_at_komquats.com>        http://www.komquats.com/
> BC Government                     .                       FreeBSD UNIX
> Cy.Schubert_at_osg.gov.bc.ca         .                     cy_at_FreeBSD.org
> http://www.gov.bc.ca/             .            http://www.FreeBSD.org/
>
>
>
>