10/stable panic: softdep_deallocate_dependencies: dangling deps

[Dmitry Sivachenko]

On 01 июля 2014 г., at 11:57, Ronald Klop <ronald-lists at klop.ws> wrote:

> On Mon, 30 Jun 2014 14:22:02 +0200, Dmitry Sivachenko <trtrmitya at gmail.com> wrote:
> 
>> Hello!
>> 
>> I have several machines with rather fresh FreeBSD-10/stable.
>> 
>> They all have 4 SATA drives, I have small gmirrored root+var and the rest of the drive space is mounted as /disk1, /disk2, etc (UFS2+SU).
>> When a single disk fails, system panics with "softdep_deallocate_dependencies: dangling deps" message:
>> http://people.freebsd.org/~demon/softdep.png
>> 
>> Since all vital data (root+var) are mirrored, I expect OS to stay alive.
> 
> Hi,
> 
> So /disk1, /disk2 are not (g)mirrored? In that case the system cannot handle write failure. Because writes are not synchronous (for speed) there is no possibility to return an error to the application.


No, they are not (g)mirrored.
I expect read/write errors, but not kernel panic.  Actually I encountered disk I/O errors since 2.2.5 and it is first time I faced kernel panic.