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Operating System - OpenVMS
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How to switch to SDA mode in open VMS

 
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Shehan
Super Advisor

How to switch to SDA mode in open VMS

Hi Team

I want to switch to SDA> mode in open VMS in order to get dklog for issued disk. Please help me to switch to SDA> mode.

Regards
Nirukshitha
12 REPLIES
Galen Tackett
Valued Contributor
Solution

Re: How to switch to SDA mode in open VMS

From an account with suitable privileges try this command:

$ ANALYZE/SYSTEM

You should get and SDA> prompt.
Galen Tackett
Valued Contributor

Re: How to switch to SDA mode in open VMS

You will need the CMKRNL privilege.
Joseph Huber_1
Honored Contributor

Re: How to switch to SDA mode in open VMS

SDA> mode ? Do You mean the SDA prompt ?
$ ANALYZE/SYSTEM .
http://www.mpp.mpg.de/~huber
Shehan
Super Advisor

Re: How to switch to SDA mode in open VMS

Hi

I am going to login from system account.So I believe I have more than enough privileges.

Anyway I am going to login to SDA prompt.


How do I exit from that prompt?

Regards
Nirukshitha
Martin Vorlaender
Honored Contributor

Re: How to switch to SDA mode in open VMS

>>>
How do I exit from that prompt?
<<<

Have you tried "exit"?

cu,
Martin
Hoff
Honored Contributor

Re: How to switch to SDA mode in open VMS

> How do I exit from that prompt?

Or

HELP?

Google can be your friend here, too.

OpenVMS SDA

Or add the Google site: keyword to the search:

site:h71000.www7.hp.com

to target the search to the host name of the HP server that serves up the bulk of the HP OpenVMS content.

Ian Miller.
Honored Contributor

Re: How to switch to SDA mode in open VMS

an example of DKLOG

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=942732

Some would say if you don't know how to get to the SDA prompt then perhaps you should not be.

However the System Analysis tools manual documents SDA and some of the SDA exenensions
http://h71000.www7.hp.com/doc/82final/6549/

but DKLOG is not documented, nor supported.
____________________
Purely Personal Opinion
labadie_1
Honored Contributor

Re: How to switch to SDA mode in open VMS

See some examples from openvms.org

typlog
http://dcl.openvms.org/stories.php?story=08/12/04/2298229
will show the last lines of the logfile of a process

find_bg
http://dcl.openvms.org/stories.php?story=08/06/09/6088086
will show the BG devices of a process

bg_process
http://dcl.openvms.org/stories.php?story=08/12/02/3240441
will display the statistics about the BG devices of a process (the Tcpip network traffic for this proces)
Robert Brooks_1
Honored Contributor

Re: How to switch to SDA mode in open VMS

I want to switch to SDA> mode in open VMS in order to get dklog for issued disk. Please help me to switch to SDA> mode.

--

What problem are you attempting to solve by looking at data generated by DKLOG?

It may be that DKLOG is the correct tool, but it's also possible that we can suggest a different approach.

DKLOG is quite powerful, but depending upon your configuration (specifically multiple paths per device [AKA multipath]), you may be a bit confused in trying to interpret it.


-- Rob
Shehan
Super Advisor

Re: How to switch to SDA mode in open VMS

Dear Robert
I have two nodes cluster with 4 X BA356 storage shelves. Currently I am getting error in a external disk of a storage.Although I replaced disk two times, still error are generating in same disk. So I want to further diagnose the disk . That is why I want dklog.

Regards
Nirukshitha
Volker Halle
Honored Contributor

Re: How to switch to SDA mode in open VMS

Nirukshitha,

check if the disk drive is logging errors. SHOW ERROR should show a non-zero error count for the disk and/or the PK port.

You should first analyse the error log. To do this, you will need either ANAL/ERR, DECevent or WEBES/SEA - depending on the type of system and OpenVMS version.

For analyzing SCSI related errors, DECevent V3.4 ($ DIAGNOSE command) is still the best tool around. You can download it from:

http://h18023.www1.hp.com/support/svctools/

The SDA DKLOG extension is mostly for diagnosing complex problems with the SCSI IO software subsystem.

Volker.
Shehan
Super Advisor

Re: How to switch to SDA mode in open VMS

Thanks all for support