Re: ASM and EMC PowerPath

One more question:

• oracleasm querydisk -p shows correctly all paths (physical and logical) to the devices.
• oracleasm querydisk -d shows the first one found during discovery

How can we know which path was used originally, when the disk was created?

Best regards
Dimitre

On 08/04/2011 10:42, Radoulov, Dimitre wrote:
>
> Hi Martin,
> thanks again for the valuable suggestions!
>
> No, there's neither UAT nor DR environment for this database ...
>
> Assuming no changes to the oracleasm configuration,
> could the following operations still break/have an impact on the live
> database?
>
> 1. Add new disks to the servers.
> 2. Create disks using the oracleasm createdisk command (using the
> first path found, in this case one of the two physical paths).
> 3. Create new diskgroup using the new disks.
>
> I don't know if running scandisks, in order to make the newly created
> disks visible to the other nodes,
> could have a negative impact on the rest of the system.
>
> I'm only looking for information and suggestions,
> I realize these operations could be destructive and most probably we
> will call Oracle for this.
>
>
> The library shows as:
>
> ASM Library - Generic Linux, version 2.0.4 (KABI_V2)
>
>
>
> Best regards
> Dimitre
>
>
> On 08/04/2011 10:20, Martin Bach wrote:
>> Hi Dimitre,
>>
>> As you're live with production such a change shouldn't be made
>> without proper testing-is your UAT environment a suitable candidate
>> for this? You might create situation where not only the new disks
>> aren't visible, but worse: the old ones won't be either creating the
>> "perfect outage". I usually do such changes in DR first, or
>> alternatively ensure that DR can be activated and stakeholders are
>> aware of the risk. You'd then hope that you followed change
>> management correctly and kept production and DR in sync .... But that
>> keeps the job interesting!
>>
>> Also, out of curiosity, what's the output of v$asm_disk.library -
>> does it show system or asmlib?
>>
>> Best regards,
>>
>> Martin
>>
>> Martin Bach
>> Martin Bach Consulting Ltd
>> http://www.linkedin.com/in/martincarstenbach
>> http://martincarstenbach.wordpress.com
>>
>>> -----Original Message-----
>>> From: oracle-l-bounce_at_freelists.org
>>> [mailto:oracle-l-bounce_at_freelists.org]
>> ....
>>
>>
>

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