Kernel Dump when accessing second drive

[Dylan Reinhold]

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.