Re: Kernel Dump when accessing second drive

[Max Herrgård <herrgard@xxxxxxxxx>]

17 maj 2010 kl. 09.13 skrev Dylan Reinhold:
> Ah I think I was assuming the detach was from the panic, not causing  
> the panic.
>
> From the logs before the panic
> May 15 15:53:37 backup_a kernel: ad6: TIMEOUT - READ_DMA retrying (1  
> retry left) LBA=49814018
> May 15 15:53:38 backup_a kernel: ad6: WARNING - READ_DMA soft error  
> (ECC corrected) LBA=49871650
> May 15 15:53:38 backup_a kernel: ad6: WARNING - READ_DMA UDMA ICRC  
> error (retrying request) LBA=49871682
> May 15 15:53:38 backup_a kernel: ad6: timeout waiting to issue command
> May 15 15:53:38 backup_a kernel: ad6: error issuing READ_DMA command
> May 15 15:53:39 backup_a kernel: ad6: WARNING - READ_DMA UDMA ICRC  
> error (retrying request) LBA=49871682
> May 15 15:53:39 backup_a kernel: ad6: FAILURE - READ_DMA  
> status=5<CORRECTABLE,ERROR>  
> error=61<UNCORRECTABLE,MEDIA_CHANGED,ILLEGAL_LENGTH> LBA=49871682
> May 15 15:53:39 backup_a kernel: ad6: WARNING - READ_DMA soft error  
> (ECC corrected) LBA=12671810
> May 15 15:53:39 backup_a kernel: ad6: WARNING - READ_DMA soft error  
> (ECC corrected) LBA=12671842
> May 15 15:53:39 backup_a kernel: ad6: WARNING - READ_DMA soft error  
> (ECC corrected) LBA=12671906
> May 15 15:55:42 backup_a syslogd: kernel boot file is /boot/kernel
> May 15 15:55:42 backup_a kernel: ad6: FAILURE - device detached
> May 15 15:55:42 backup_a kernel: subdisk6: detached
> May 15 15:55:42 backup_a kernel: ad6: detached
>
>
> Does this mean the controller is reporting the disk is gone?
>
> Dylan

I got similar messages using two disks with an old WD sata disk (among  
the first 250 GB disks I think) and nata during boot. Sometimes the  
disk attached, but mostly not. It attached ok in OpenBSD and NetBSD  
but it took quite some time there to get done (error handling?).

However, as far as I can remember, it worked ok in DragonFly as long  
as it attached during boot. I don't think came up with a good  
solution. Using a different disk or an AHCI controller is probably  
easiest ;-)

Keep digging though,
Max