Any help about FreeBSD & Dell's Troubleshooting Tool DSET

Scott Long scottl at
Thu Nov 13 06:15:18 PST 2008

The sense data in the screen shot boils down to an ASC/ASCQ pair of 
0x35/0x05.  Looking this up in the ASC table found at gives
the following:


What this basically means is that the disk enclosure that you're using
has some sort of an unknown defect or failure.  It has nothing to do 
with the OS.  Dell needs to send you a new enclosure, plain and simple.


Jeremy Chadwick wrote:
> On Thu, Nov 13, 2008 at 02:16:58PM +0100, VeeJay wrote:
>> I have asked the system manufacturers (Dell) but they don't provide support
>> for FreeBSD based systems [?]
>> Thats why I have only hope here with FreeBSD List...
> I've CC'd Scott Long, who is the author of the mfi(4) driver.  He should
> be able to explain what the error messages mean.
> Scott, check out the URL below.
>> On Thu, Nov 13, 2008 at 1:41 PM, Jeremy Chadwick <koitsu at> wrote:
>>> On Thu, Nov 13, 2008 at 01:29:11PM +0100, VeeJay wrote:
>>>> If it looks healthy, why there are these errors on the screen? Is it
>>>> controller problem or disk?
>>> SCSI normally reports 3 things when it encounters an error (particularly
>>> disk errors): Sense Key (SK), Additional Sense Code (ASC), and
>>> Additional Sense Code Qualifier (ASCQ).
>>> What appears in the below screenshot is a large amount of sense data,
>>> but I can't make heads or tails out of it, because it's written in a
>>> driver-centric manner ("Encl PD" means nothing to me).  I can read part
>>> of the CDB data, but it doesn't tell me much.  Scott Long might know.
>>> You should try asking the system manufacturer if they know what any
>>> of the data means.

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