Re: CAM Target Layer, Linux and camcontrol readcap

On Wed, Sep 26, 2012 at 9:02 AM, Nikolay Denev <ndenev@gmail.com> wrote:
....
> I've did ctladm dumooa :
>
> Dumping OOA queues
> LUN 0 tag 0x000d RTR: SYNCHRONIZE CACHE(10). CDB: 35 0 0 0 0 0 0 0 0 0
> (91807313 ms)
> LUN 0 tag 0x0011 BLOCKED: READ CAPACITY(10). CDB: 25 0 0 0 0 0 0 0 0 0
> (35411180 ms)
> LUN 0 tag 0x0012 BLOCKED: READ CAPACITY(10). CDB: 25 0 0 0 0 0 0 0 0 0
> (35228663 ms)
> LUN 0 tag 0x0013 BLOCKED: START STOP UNIT. CDB: 1b 0 0 0 1 0  (34721150 ms)
> OOA queues dump done
>
>
> And if I'm reading this right the other commands blocked because of the sync
> cache.
>
> I will try now to set realsync to off before enabling the ports and retest.

Yup, this is the symptom you will see unless realsync is off (ie. GEOM
is barfing on the sync and this blocks subsequent commands from
completing).

---chuck
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