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тАО01-27-2006 01:13 AM
тАО01-27-2006 01:13 AM
OpenVMS Volume Shadowing and "SET DEVICE/PATH"
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тАО01-27-2006 02:05 AM
тАО01-27-2006 02:05 AM
Re: OpenVMS Volume Shadowing and "SET DEVICE/PATH"
As I understand your question, SET DEVICE/PATH should be independant of shadowing at that level.
Shadowing references are are to the DSA devices, SET DEVICE/PATH would affect the underlying DGA devices (based upon your use of FC disks).
I would have to research the shadowing manual to be sure. I would also accept correction from John, if he is following this thread.
- Bob Gezelter, http://www.rlgsc.com
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тАО01-27-2006 02:10 AM
тАО01-27-2006 02:10 AM
Re: OpenVMS Volume Shadowing and "SET DEVICE/PATH"
I concur with Bob, with one (not important) remark: please specify your VMS version and patchlevel, as there have been some major enhancements in the last few of those, which may seriously influence the answer that applies to you.
Proost.
Have one on me.
jpe
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тАО01-27-2006 02:11 AM
тАО01-27-2006 02:11 AM
Re: OpenVMS Volume Shadowing and "SET DEVICE/PATH"
-SYSTEM-E-NOSUCHPATH, specified path does not exist" error message so the Shadow Server will disable the "SET DEVICE/PATH" command for a device that was added to a Shadow Set. If you dismount the shadow disk, the command still will not work.
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тАО01-27-2006 02:12 AM
тАО01-27-2006 02:12 AM
Re: OpenVMS Volume Shadowing and "SET DEVICE/PATH"
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тАО01-27-2006 02:41 AM
тАО01-27-2006 02:41 AM
Re: OpenVMS Volume Shadowing and "SET DEVICE/PATH"
As has been correctly noted, the concept
of multiple paths for fibre channel devices is completely independent of whether or not said device is a shadow set member.
So, to answer the question -- Yes, you can
issue a $ SET DEVICE /PATH =
-- Rob (who spends much of his day writing code to deal with multipath, and is rather familiar with host-based volume shadowing)
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тАО01-27-2006 02:44 AM
тАО01-27-2006 02:44 AM
Re: OpenVMS Volume Shadowing and "SET DEVICE/PATH"
Once a shadow device has been mounted, the "SET DEVICE/PATH" returns a %SET-E-NOTSET, error modifying $1$DGA1250:
-SYSTEM-E-NOSUCHPATH, specified path does not exist" error message so the Shadow Server will disable the "SET DEVICE/PATH" command for a device that was added to a Shadow Set. If you dismount the shadow disk, the command still will not work.
--
I cannot explain (yet) the behaviour that you observe, but I can say that your speculation as to *why* it is happening is not correct.
There is no notion whatsoever of "disabling"
commands done by the SHADOW_SERVER process.
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тАО01-27-2006 03:09 AM
тАО01-27-2006 03:09 AM
Re: OpenVMS Volume Shadowing and "SET DEVICE/PATH"
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тАО01-27-2006 03:11 AM
тАО01-27-2006 03:11 AM
Re: OpenVMS Volume Shadowing and "SET DEVICE/PATH"
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тАО01-27-2006 03:35 AM
тАО01-27-2006 03:35 AM
Re: OpenVMS Volume Shadowing and "SET DEVICE/PATH"
My apologies, it slipped my mind that that was in your area.
Craig,
No problem. However, as Jan (and others would point out), it is good practice to award the points when closing the thread.
- Bob Gezelter, http://www.rlgsc.com