Help with IDE RAID
Ryan Merrick
sandshrimp at attbi.com
Wed Apr 2 13:51:46 PST 2003
David Olbersen wrote:
>Here's the history:
>
>I installed a Promise TX2000 IDE RAID along with 2 drives. Booted into the BIOS of the TX2000 and defined a RAID-1 array using both drives.
>
>Then, due to circumstances, I had to take out the card and replace it with a plain IDE controller (Promise Ultra 100).
>
>Now when I boot I see the following in dmesg:
>
>===snip!===
>atapci1: <Promise ATA100 controller> port 0xef00-0xef3f,0xefa4-0xefa7,0xefa8-0xefaf,0xeff0-0xeff3,0xefe0-0xefe7 mem 0xffac0000-0xffadffff irq 11 at device 20.0 on pci0
>===snip!===
>ar0: 117301MB <ATA RAID1 array> [14953/255/63] status: DEGRADED subdisks:
> 0 FREE ad6: 117800MB <IC35L120AVV207-0> [239340/16/63] at ata3-master UDMA100
> 1 READY ad4: 117800MB <IC35L120AVV207-0> [239340/16/63] at ata2-master UDMA100
>===snip!===
>
>So it looks like I have an array (ar0) even though I don't have the RAID controller any more!
>
>`atacontrol list` gives the following:
>ATA channel 0:
> Master: no device present
> Slave: no device present
>ATA channel 1:
> Master: no device present
> Slave: no device present
>ATA channel 2:
> Master: ad4 <IC35L120AVV207-0/V24OA63A> ATA/ATAPI rev 6
> Slave: no device present
>ATA channel 3:
> Master: ad6 <IC35L120AVV207-0/V24OA63A> ATA/ATAPI rev 6
> Slave: no device present
>
>So I tried `atacontrol detach 3`. Then rebooted. The dmesg about above is from after that boot. The array is still there, but degraded. I'd like to just get rid of it and have my two drives (ad4 and ad6) to use with vinum.
>
>This machine is running 4.5-STABLE #1, any suggestions?
>
>--------------------------
>David Olbersen
>iGuard Engineer
>11415 West Bernardo Court
>San Diego, CA 92127
>1-858-676-2277 x2152
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>
>
>
I have not used a IDE RAID controler, But I do know RAID. When you
create a RAID disk the configuration of the RAID is copied to all of the
drives and the controller.
I guess, for your problem to use fdisk (8) to regenerate the MBR on one
of the disks and boot from it.
-Ryan
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