8.0RC1: panic: softdep_deallocate_dependencies: unrecovered I/O error

[John Baldwin]

On Thursday 22 October 2009 3:17:38 pm pluknet wrote:
> Hi.
> 
> I saw this panic just onсe during system shutdown, which
> runs under VirtualBox. Sorry, I don't remember more details.
> 
> Unread portion of the kernel message buffer:
> ad0: FAILURE - device detached
> g_vfs_done():ad0s1e[WRITE(offset=7380582400, length=131072)]error = 6
> /usr: got error 6 while accessing filesystem
> panic: softdep_deallocate_dependencies: unrecovered I/O error

Generally speaking UFS does not cope well with disk I/O errors and disks
going away (note that ad0 failed and detached before your panic).

-- 
John Baldwin