[cisco-voip] Cisco Revoking Drive Pull Support!

[Ryan Ratliff]

HP has told us for a long time that they did not support breaking  
mirrors for backup purposes.  The assumption that the drive you  
pulled was already bad so if data is lost from it then it's not a big  
deal.  I thought they had recently changed their support policy on  
this but perhaps I was wrong.

-Ryan

On Feb 27, 2007, at 8:47 AM, Ed Leatherman wrote:

So if you pull a drive and the array doesnt think its bad then you're  
screwed if it doesnt re-build? That seems pretty ridiculous for  
something that supposed to be built for fault tolerance etc.

Is this just HP arbitrarily deciding not to support something because  
their RAID controller might not work as expected? That gives me warm  
and fuzzies...

On 2/27/07, Matt Slaga (US) <Matt.Slaga at us.didata.com> wrote:
For those of you who swap hard drives before upgrades, beware!  Cisco  
has changed their stance and no longer supports this.



Internal Cisco conversation:


Hi,


I have a client that was upgrading their CallManager server this  
weekend.  They powered down the server and pulled a drive.  They then  
powered the server back up and tried to mirror a new drive - pretty  
standard practice for backup and recovery on CallManager servers.


Unfortunately there was a problem and the drive wouldn't mirror.


Cisco's TAC engineer got an HP engineer on the phone to help  
troubleshoot and the HP engineer told the customer and TAC that  
pulling a drive and mirroring a new drive was not supported.  And  
that the array only allows you to pull a drive it the array thinks  
the drive has failed.  Again this was done on a server that had been  
powered down.


Needless to say our client was not happy since this is a pretty  
standard practice and one that Cisco has even documented.  I need to  
understand why the HP engineer said we should not be doing this.  As  
an ex partner - I did this on a regular basis and never had issues.


If this is something that should not be done then we have a bigger  
problem since a lot of our documentation references pulling a drive  
as a backup procedure.  Any help and guidance would be appreciated  
since we have to respond back to the client today.


Anita Dulude

Consulting Systems Engineer

Cisco Systems, Inc




Response:


Anita,


It is not supported as a method to backup a system.  Please provide  
the links where it is documented and I will get someone from  
CallManager product management to revise the document.




Dave English

Product Manager - MCS Platforms

Cisco

IP Communications Business Unit




Response:


I wanted to follow up from the links I sent you to see if the  
documentation is correct or not.  This is critical since there are a  
lot of engineers and clients following this procedure and if this is  
wrong - a lot of documents will need to be updated.  I found  
Meetingplace documents that document pulling drives also.  So this is  
definitely beyond just CallManager.


Anita Dulude

Consulting Systems Engineer

Cisco Systems, Inc




Response:


Anita,


It is not supported.  The documents are wrong and should be  
corrected.  I have asked Wade Hamblin of CallManager Product  
Management to have the docs revised.




Dave English

Product Manager - MCS Platforms

Cisco

IP Communications Business Unit








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-- 
Ed Leatherman
Senior Voice Engineer
West Virginia University
Telecommunications and Network Operations
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