StarWind and RESERVE/RELEASE?

mprowe · Sun May 18, 2008 12:47 pm

Hi,

I note that in the FAQ (Q18) http://www.rocketdivision.com/faq.html?pr_id=2 that for devices connected with the SPTI,
StarWind should redirect all RESERVE/RELEASE op-codes directly to the device.

However, I'm not sure that this is happening?
I am using StarWind 3.5.1 and StarPort 3.5.4 and the following screen shot shows a device analyser monitoring
the Initiator (left side tab, addrs = .2) and the Target (right side tab, addrs= .3).
The Initiator has issued a series of SCSI CDBs and these IO requests have been trapped and displayed.
I think I see that the Initiator has issued a Reserve/Release pair (counter 6 & 13 - highlighted).
However, these commands are not reflected at the Target? Where have they gone?

First thoughts - Initiator or Target problem? So I watch the network between the two. This next screen shot shows that trace.

From this, I conclude that the Reserve/Release op-codes are leaving the Initiator and are, in fact are being acknowledged by the Target (counters 1228/9 & 1278/9 - highlighted).

Working from this information, I have to conclude that the StarWind service is taking it upon itself to handle the Reserve/Release commands - contrary to FAQ, Q18?

Any advice that would reconcile/correct this option will be much appreciated.

Best regards,

Martin

Sun May 18, 2008 1:56 pm

Before Valery will take a closer look I have a question: are you trying to reserve/release a scanner?

mprowe · Mon May 19, 2008 6:27 am

I have a question: are you trying to reserve/release a scanner?

Hi Anton, â€¦. Are you psychic? Or is it just a good memory<grin>?

Unfortunately, we Bsc students donâ€™t have the luxury to become disinterested

gota come up with some sort of conclusion, you know!

Martin

Val (staff) · Mon May 19, 2008 10:38 am

Hi Martin,

You are right, the recent StarWind core process reserve/release operations internally for all targets by default.
It's okay for all the virtual device modules, but for such cases with SPTI-mapped devices the internal processing of reservation commands can be switched off.

1) Open StarWind.cfg in notepad and find the SPTI-device you want to disable internal reservation processing.
2) Add 'reservation="no"' to the list of the device's parameters.
3) Restart the StarWindService.

After that the SPTI device should receive the reservation SCSIOPs.

Mon May 19, 2008 7:08 pm

No I'm not. You just have UMAX Astra 22xx listed as conneted to the StarPort Storage Controller. Your own screenshot

mprowe wrote:
I have a question: are you trying to reserve/release a scanner?
Hi Anton, â€¦. Are you psychic? Or is it just a good memory<grin>?

Unfortunately, we Bsc students donâ€™t have the luxury to become disinterested gota come up with some sort of conclusion, you know!

Martin