Asmlib and VX DMP

setup a dg and raw volumes in Veritas to use as ASM. I was able to createdisk on them and see them ok, however after reboot they don't show up, and I suspect is an issue with scandisk, judging by the logs.
# oracleasm querydisk /dev/vx/dsk/mon2a-raw/raw-data1
Device "/dev/vx/dsk/mon2a-raw/raw-data1" is marked an ASM disk with the label "DATA1"
There are several others, all of which can be seen with querydisk. However when I try and run scandisks it hangs for 10-15 minutes, and the oracleasm log is looking up bogus VxVM devices -
Creating /dev/oracleasm mount point: /dev/oracleasm
Loading module "oracleasm": oracleasm
Mounting ASMlib driver filesystem: /dev/oracleasm
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
oracleasm-read-label: Unable to open device "/dev/VxDMP1": No such file or directory
oracleasm-read-label: Unable to open device "/dev/VxDMP1": No such file or directory
oracleasm-read-label: Unable to open device "/dev/VxDMP1": No such file or directory
oracleasm-read-label: Unable to open device "/dev/VxDMP1": No such file or directory
oracleasm-read-label: Unable to open device "/dev/VxDMP1p1": No such file or directory
oracleasm-read-label: Unable to open device "/dev/VxDMP1p1": No such file or directory
oracleasm-read-label: Unable to open device "/dev/VxDMP1p1": No such file or directory
oracleasm-read-label: Unable to open device "/dev/VxDMP1p1": No such file or directory
I've tried updating /etc/sysconfig/oracleasm to reflect the DMP style naming, but am not sure this is even close to correct - the only documentation I've been able to find is for multipath with Linux.
# ORACLEASM_SCANORDER: Matching patterns to order disk scanning
ORACLEASM_SCANORDER="vx"
# ORACLEASM_SCANEXCLUDE: Matching patterns to exclude disks from scan
ORACLEASM_SCANEXCLUDE="VxVM"

Thanks Wim. Thanks a lot. You are the only one who gave me the right answer on what I was asking
almost three years. In fact, you've just confirmed what I always thought (or at least suspected).
Namely, after having examined the raw driver source code on Linux kernel source tree as well as
Stephen Tweedie's `raw' binding utility, I was continuously trying to convince my colleagues that
Linux raw-bound device interface was nothing else but a fatamorgana, a mirage of something called
"Sun Solaris native raw character device interface", doing nothing else but opening a block device
with O_DIRECT. Thanks a lot.
So, if I got you right, using ASM on Linux implies that setting Oracle startup parameters
'disk_asynch_io=TRUE' and 'filesystemio_options=SETALL' is obsolete (redundant), except in the case
that traditional Oracle filesystem is combined with ASM.
One more question, please, and I'll finish. If ASMLib is just an add-on module with primary function
to simplify the management and discovery of ASM disks, but doesn't necessarily give us much of an io
performance benefit, as you wrote, why does it exist only for Linux? There is no ASMLib for other
unixes (Solaris, AIX, HP-UX etc). Only for Linux. Why would be the management and discovery of ASM
disks more complicated on Linux than on other unixes, so that we need ASMLib only for Linux?
Hundred times - thanks a lot.
Regards
N.J.

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    Preferred sites: Onedrive, Mediafire, Dropbox, etc. Nothing with wait-timers, download managers, etc.
    4 (optional): The type of .DMP files located in the Minidump folder are known as Small Memory Dumps. In %systemroot% there will be what is known as a Kernel Memory Dump (if your system is set to generate). It is labeled MEMORY.DMP. The difference
    between Small Memory Dumps and Kernel Memory Dumps in the simplest definition is a Kernel Memory Dump contains
    much more information at the time of the crash, therefore allowing further debugging of your issue. If your upload speed permits it, and you aren't going against any strict bandwidth and/or usage caps, etc, the Kernel Memory Dump is
    the best choice. Do note that Kernel Memory Dumps are much larger
    in size due to containing much more info, which is why I mentioned upload speed, etc.
    If you are going to use Onedrive but don't know how to upload to it, please visit the following:
    Upload photos and files to Onedrive.
    After doing that, to learn how to share the link to the file if you are unaware, please visit the following link -
    Share files and folders and change permissions and view 'Get a link'.
    If your computer is not generating .DMP files, please do the following:
    1. Start > type %systemroot% which should show the Windows folder, click on it. Once inside that folder, ensure there is a Minidump folder created. If not, CTRL-SHIFT-N to make a New Folder and name it Minidump.
    2. Windows key + Pause key. This should bring up System. Click Advanced System Settings on the left > Advanced > Performance > Settings > Advanced > Ensure there's a check-mark for 'Automatically manage paging file size for
    all drives'.
    3. Windows key + Pause key. This should bring up System. Click Advanced System Settings on the left > Advanced > Startup and Recovery > Settings > System Failure > ensure there is a check mark next to 'Write an event to the
    system log'.
    Ensure Small Memory Dump is selected and ensure the path is %systemroot%\Minidump.
    4. Double check that the WERS is ENABLED:
    Start > Search > type services.msc > Under the name tab, find Windows Error Reporting Service > If the status of the service is not Started then right click it and select Start. Also ensure that under Startup Type it is set to Automatic rather than
    Manual. You can do this by right clicking it, selecting properties, and under General selecting startup type to 'Automatic', and then click Apply.
    If you cannot get into normal mode to do any of this, please do this via Safe Mode.
    Regards,
    Patrick
    “Be kind whenever possible. It is always possible.” - Dalai Lama

  • Auto Restart and Error Screen In Windows 8.1

    Hello
    I am running Windows 8.1 64 BIT on HP EliteBook 800 G1 SFF
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    So I went to Event Viewer and i got those messages :
    Log Name:      System
    Source:        Microsoft-Windows-WER-SystemErrorReporting
    Date:          10/26/2014 11:37:48 AM
    Event ID:      1001
    Task Category: None
    Level:         Error
    Keywords:      Classic
    User:          N/A
    Computer:     
    Description:
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      <System>
        <Provider Name="Microsoft-Windows-WER-SystemErrorReporting" Guid="{ABCE23E7-DE45-4366-8631-84FA6C525952}" EventSourceName="BugCheck" />
        <EventID Qualifiers="16384">1001</EventID>
        <Version>0</Version>
        <Level>2</Level>
        <Task>0</Task>
        <Opcode>0</Opcode>
        <Keywords>0x80000000000000</Keywords>
        <TimeCreated SystemTime="2014-10-26T18:37:48.000000000Z" />
        <EventRecordID>550</EventRecordID>
        <Correlation />
        <Execution ProcessID="0" ThreadID="0" />
        <Channel>System</Channel>
        <Computer>------</Computer>
        <Security />
      </System>
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        <Data Name="param2">C:\Windows\MEMORY.DMP</Data>
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      </EventData>
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    https://www.mediafire.com/?x6i37s2hh6zu38y
    Please Advice
    Mohamed Mahmoud IT Specialist

    These crashes were related to memory corruption (probably caused by a driver). 
    Please run these tests to verify your memory and find which driver is causing the problem.  
    If you are overclocking (pushing the components beyond their design) you should revert to default at least until the crashing is solved. If you don't
    know what it is you probably are not overclocking.
    Since it is more likely to be a driver please run verifier first.
    1-Driver verifier (for complete directions see our wiki here)
    If verifier does not find the issue we can move on to this.
    2-Memtest. (You can read more about running memtest here)
    If you cannot boot after enabling verifier reboot into safe mode
    In Vista & win 7 (F8)
    In win 8 http://www.howtogeek.com/107511/how-to-boot-into-safe-mode-on-windows-8-the-easy-way/
    Co-Authored by  JMH3143
    Wanikiya and Dyami--Team Zigzag

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    Hi Cisco Expert,
    Could you help to check ELO 3209L Touch Screen, i'd like to use this screen in our Digital Signs Systems (AppSpace 5. and 340 DMP), but i'm not sure about 340 DMP which can support 3209L or not, some screen model from cisco website.
    ELO Interactive Digital Signage Display
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    ELO Desktop Touchmonitor including 1715L,
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    2244L, and 3201L.
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    Anytouch WTM320T
    Dell ST2220Tc
    NEC V463-TM,V423-TM
    Thanks&Rgds.

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    2) Can we import the data into some temporary table(say: temp) in same schema?
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    Please help me out.
    Edited by: user11942774 on 4 Dec, 2011 10:33 PM

    Thanks Mahir,
    Could you please let me know the syntax or with any examples if possible.
    is it possible to drop any column say blob column after the table is in compressed mode?
    Edited by: user11942774 on 4 Dec, 2011 10:53 PM
    Edited by: user11942774 on 4 Dec, 2011 10:54 PM

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