Confirmation Of Drive Failure

Adam Vande More amvandemore at
Sat Nov 9 01:42:43 UTC 2013

On Fri, Nov 8, 2013 at 6:43 PM, Adam Vande More <amvandemore at>wrote:

> On Fri, Nov 8, 2013 at 6:13 PM, Warren Block <wblock at> wrote:
>> On Fri, 8 Nov 2013, Adam Vande More wrote:
>>  Also regarding ada0, dangerously dedicated mode is not supported 8.x+
>> AFAIK, it would still work, it's just not recommended.  The installer
>> memory stick images still use it, even on 10.0.
> It was removed in 8.0R.  The memstick image must be built in a flaky way,
> but it doesn't actually use the 'a' device to mount.

The release notes don't appear to fully describe the situation.  After a
little digging sysinstall support was removed in 8.0R due to
incompatibilities with GEOM and DD devices won't work on that release.  But
the memstick doesn't mount the DD device, it mounts its base device so
that's not a valid example of DD still working.  I haven't seen a DD device
mount post 8.0 and I haven't tried really.  Do you have examples of DD
devices mounting past 8.0R?  It seems GEOM still recognizes these devices
but that doesn't mean it's functional.

There are also examples of users having to convert DD devices so that they
could get it to mount.

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