eKnowledge! from SoftTech Solutions
itsupportal.com December 2006 - Issue #5


Spotlight on Solaris

Ask Al


 

Spotlight on Solaris

Spotlight On: SVM - The State Database
 
Last month I introduced you to the Solaris Volume Manager (SVM). I'll continue this month on the topic by describing the role of the SVM state database.
 
The SVM state database keeps track of configuration and status information for the SVM volumes (metadevices), hot spares and error conditions. In SVM, a state database must be created and initialized before volumes can be configured. As volumes are created or modified, SVM stores the configuration information in the state database. Therefore, the state database is critical to SVM and Sun recommends that you create a minimum of two additional copies of the state database, called replicas, for a total of three. You'll distribute these replicas across each drive to protect against a drive failure. If all of the replicas are stored on the same drive, and that drive were to fail, all copies of the state database would be lost and your SVM configuration would be lost with it. Without your SVM configuration information, all data stored on the SVM volumes becomes inaccessible.
 
Multiple replicas also protect the state database against corruption that could result from a system crash. When the state database is updated, replicas are modified one at a time so that if a crash occurs while the database is being updated, only one of the replicas is corrupted. If a state database replica would ever become corrupt, that database is ignored and the other copies could still be accessible.
 

Click here to read more...





 

Our Year in Review

2006 was a tumultuous year for the Sun community. On a high note - the new web-based version of the On-Line! Detective for Sun reached a new milestone by turning ONE! This new service is powered by a superior interface and a powerful database to improve performance. As a user you will certainly notice that updates are more frequent and the information more current. The bottom line is that we are able to deliver more content in less time.

This year we added the content necessary to help our users achieve Solaris Certification. More guidance was added for advanced troubleshooting, including device path interpretation. Each system's landing page was also enhanced to include more detailed configuration information and links to Sun's public patches. This year we were able to add a great deal of information but much of our energy went into enhancing the Detective's "engine" - the code to drive content delivery. We think you will really notice the 'power' with the January updates.

Our goal has always been to turn information into knowledge and provide it at the point of need. With this as our motto we work to put the knowledge into your hands in "3-clicks or less." So far, your feedback has been overwhelmingly positive, but we promise not to rest on our laurels. We are excited to reveal our "New Years' Resolutions" to you next month!

On a low note - Sun Microsystems changed its Patch policy on July 27th - requiring users to accept a new click-thru license agreement to access and use all Sun software updates moving forward. BE CAREFUL - READ THE FINE PRINT. If you click "agree" on SunSolve you severely restrict how, and by whom, you support your IT environment. You may also be subject to an audit by Sun. From our perspective, "open" no longer looks so open.

Sun has a lot planned for 2007, so stay alert! Expect to see more marketing campaigns by Sun, attempting to discourage the use of used equipment. Sun will also raise Solaris 7 and 8 prices 25% in February. It is also expected that the price of Solaris 9 will rise. Despite efforts by Sun to increase overall costs, we will continue to provide value and demonstrate methods to reduce cost of ownership.

With 2006 almost behind us, we now turn our attention to 2007. All of us here at SoftTech wish you a safe holiday season and a prosperous new year!

Warm Regards,
Paul Violassi
CEO, SoftTech Solutions


  • Ask Al
  • Question #1
    I have noticed that the On-Line! Detective has OpenBoot PROM commands that I have never seen documented anywhere else. Can you tell me where and how you obtain these commands?
     
    Answer:
    There are a number of useful commands hidden within the OpenBoot PROM. Finding the commands is relatively easy but the challenge is learning how to use them. If you want to see all commands in the OpenBoot PROM, simply type "words" at the "ok" prompt.
    Click here to read the rest of this answer...

    Question #2
    I'm working on a system and having a hard time determining if I'm having a hardware problem or if it's a software bug. Can you give me some guidelines on how to separate a hardware problem from a software bug? I may need to add a patch so can you give me a quick primer on patches as well?
     
    Answer:
    Here are common diagnostic questions which can be used to help isolate the problem:

    • What is the system hardware, model number, and serial number?
    • What Operating System release level are you running? ("uname -a")
    • What Patches have been applied? ("showrev -p")
    • Have there been any recent modifications to the system or the computing environment? Think this over carefully. Even small changes to the environment, such as changes in other client/servers or network loads can uncover dormant problems in a system
    • Does the system power up and pass self diagnostics, resulting in "ok" prompt? If not, the system has detected a hardware problem and hardware replacement is required.

    Click here to read the rest of this answer...

    Do you have a question you'd like to see answered in a future issue of eKnowledge? Email Allen at: askal@stsolutions.com


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