Question about ASM

Hi dears,
I am planning the installation of G.I 11R2 and have a question regarding ASM.
If I have ASM diskgroup with normal or high redundancy for my DB need I create multiplex redologs and
multiplex controlfiles ? If I understood correctly the multiplex redologs and controlfile is another HA and DR option.
From Oracle documentation
*"To protect against a failure involving the redo log itself, Oracle Database allows a multiplexed redo log, meaning that two or more identical copies of the redo log can be automatically maintained in separate locations."*
Question rised when I checked my old G.I with RACcheck and got the following....
     The online redo logs of an Oracle database are critical to availability and recoverability and should always be multiplexed even in cases where fault tolerance is provided at the storage level.
The controlfile of an Oracle database is critical to availability and recoverability and should always be multiplexed even in cases where fault tolerance is provided at the storage level.
"should always be multiplexed even in cases where fault tolerance is provided at the storage level"
WHY ????
Please share your experience.
./thanks

Ilmar Kerm wrote:
Redo logs and controlfile are very critical for database, and if something happened with one copy of them (like file is deleted or corrupted) you can quickly recover by copying over the damaged file with the contents from the surviving file (copies are identical). So copies should be located on separate LUNs/disks/diskgroups/filesystems.Thanks Ilmar for reply.
I understand what you said its obvious. My questions is that if I already have 2 copies or 3 copies of redolog files with ASM nigh or normal redundancy why I need to do it also with creating multiplex redo file.....

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    Fifth, I now have a "Music" setting, at the bottom of which I see a "Home Sharing" item, which when clicked brings up my AppleID and asks me if I want to Sign Out or Cancel. What is Home Sharing? Its also at the bottom of the "Video" settings.
    Sixth, now I have Twitter and Facebook settings? For what? I don't have accounts with either of those companies. So why have settings, especially since it asks me to create accounts and download apps for those companies right in the Settings?
    Seventh, there is a camera icon on the unlock screen. Touching it causes the screen to bounce up about a quarter inch, almost but not quite revealing something behind it. I should probably just quit asking about this stuff already, but I'll take the bait - what is this now?
    Finally, what is the Notification Center used for?
    If I got a text under iOS4, it would put an alert on the Unlock screen. Scrolling through this huge list of things under the Notification settings I'm really blown away by all the apps set up to yell at me. I can see having an alert for a text message but Game Center? What the heck is that, and why is it set up to hit me with a "Badge App Icon" (whatever that is) when I get alerts from "Everyone". Similarly, the phone is set to alert me to something called a "Photostream Alert"? What is this? Why is there a Phone section for the Notification Center? So they can put a Notice on my screen to tell me the phone is ringing? Holy cow! The phone is set to send me alerts from the "Weather Widget". So if I miss the fact its raining there will be a message on my screen to let me know? Whats next - a buzzer to tell me I'm listening to music?
    There's a lot more, like what would I need Passbook for when I have the actual movie tickets, gate boarding passes, coupons, etc in my hands, but we'll leave that for another time. Many thanks to all who can offer some answers to my questions above.

    Hey Taantumus!
    Here is an article that will provide some guidance on this question:
    Apple ID: Changing your password
    http://support.apple.com/kb/ht5624
    The next time you use an Apple feature or service that uses Apple ID, you'll be asked to sign in with your new Apple ID password.
    Thanks for coming to the Apple Support Communities!
    Regards,
    Braden

  • Questions about using Bitlocker without TPM

    We currently use Bitlocker to encrypt our Windows 7 computers with TPM. Now we are looking at encrypting some Windows 7 computers without a TPM. I see how to change the group policy setting to allow Bitlocker without a TPM. I have looked at a lot of other
    threads and I have a few questions about how the Bitlocker without TPM works.
    1) I see a USB drive containing a key is required for Bitlocker configurations without a TPM, say the end user loses this USB drive, what are the recovery options for their computer? 
    This article seems to indicate that without the USB drive connected, you are unable to even access recovery options http://blogs.technet.com/b/hugofe/archive/2010/10/29/bitlocker-without-tpm.aspx
    We have recovery backed up to AD when Bitlocker is enabled, but how could we do this recovery on a computer on computer where it's USB is lost? Would we have to remove the HD itself and attach it to another computer to access?
    2) After enabling Bitlocker on a computer without a TPM and using the USB Drive for the key, is there a way to also add a PIN or password protection at bootup?

    Hi,
    Sorry for my dilatory reply, 
    Configuring a startup key is another method to enable a higher level of security with the TPM. The startup key is a key stored on a USB flash drive, and the USB flash drive must be inserted every time the computer starts. The startup key is used to provide
    another factor of authentication in conjunction with TPM authentication. To use a USB flash drive as a startup key, the USB flash drive must be formatted by using the NTFS, FAT, or FAT32 file system.
    You must have a startup key to use BitLocker on a non-TPM computer.
    From: http://technet.microsoft.com/de-de/library/ee449438(v=ws.10).aspx#BKMK_Key
    For more Q&A about BitLocker, you can refer to the link above.
    hope this is helpful.
    Roger Lu
    TechNet Community Support

  • Questions about Rooting...

    Hi everyone, I’ve some questions about rooting my Xperia Arc S. Hopefully I’ll get helpful answers from you.
    If I root my phone, shall I get regular software official updates from Sony?
    Currently Sony is rolling out the ICS update. After rooting the phone am I able to upgrade my phone to ICS?
    While rooting the phone if any damage is done, can that be recoverable by installing a fresh OS or something?
    Does the rooting process delete all the existing contacts, messages, apps etc?
    Finally can anyone please provide a full proof guide/tutorial for rooting the Xperia Arc S?
    Thanks in advance.
    Solved!
    Go to Solution.

    Do you have an app named Super USer ?
    Were you on 4.0.4 and then rooted your mobile using this method ?
    If yes then your mobile is not rooted for sure
    See how to root 4.0.4 here
    Discussion guidelines.
    Message me or any other moderator to seek help regarding moderation.

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