Re: Kernel Dump when accessing second drive

[Dylan Reinhold <dylan@xxxxxxxxxxxxxxxx>]

On 05/16/2010 11:47 PM, YONETANI Tomokazu wrote:
>     358  ad_done(struct ata_request *request)
>     359  {
>     360      struct ad_softc *adp = device_get_ivars(request->dev);
>     361      struct bio *bp = request->bio;
>     362      struct buf *bbp = bp->bio_buf;
>     363
>     364      /* finish up transfer */
>     365      if ((bbp->b_error = request->result))
>     366          bbp->b_flags |= B_ERROR;
>     367      bbp->b_resid = bbp->b_bcount - request->donecount;
> *  368      devstat_end_transaction_buf(&adp->stats, bbp);
>
> I'm under the impression that the machine was panicked because
> the interrupt was delivered after ad6 was detached for some reason.
> ad_detach() in fact sets NULL to the device's ivars.
>
> So probably you need to look into the log and find out why it was
> detached in the first place.
>
>    
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