Bug#740701: multipath-tools: mkfs fails "Add. Sense: Incompatible medium installed"

[Martin George]

On 6/24/2014 4:11 AM, Hans van Kranenburg wrote:
> On 06/23/2014 06:31 PM, Hans van Kranenburg wrote:
> Questions left:
>   - Is it wanted to have the linux kernel multipathing fail an iop
> instead of retry on receiving the combination of a medium error and
> additional code incompatible medium installed?

Well, it would have been ideal if the Linux kernel had given up for this 
MEDIUM ERROR - INCOMPATIBLE MEDIUM INSTALLED ASC as well, instead of 
retrying on all available paths (since retrying would only end up 
hitting the same error again, given that this is a device error).

>   - Now I'm left with my broken NetApp, and I'd like to start using
> UNMAP on it... Any comments from netapp people reading this? There must
> be some reason why this is happening, and only on this specific lun, and
> not on the test lun, or on several of the other NetApp filer we use.
>

Yes, the NetApp controllers are returning this MEDIUM ERROR check 
condition for some reason. I'd suggest you open a NetApp support ticket 
for tracking this.

-Martin