Re: [Fwd: Re: amr driver issues in 7.1-RELEASE]

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Parent Message unknown Re: [Fwd: Re: amr driver issues in 7.1-RELEASE]

by Steve Polyack-2 :: Rate this Message:

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> It appears this has not been fixed in 7.1-p4 I've been waiting to upgrade due
> to this but was forced after latest root exploit was found recently. Upon MySQL
> upgrade, running mysql_upgrade which upgrades and checks all the tables,
> I got 2 of these messages while a large ,1.4G, mysql table was being dumped
> to array so it could be repaired. I don't know what to make of this error and
> are not sure if it could be safely ignored.
>
> amr0: Too many retries on command 0xc71ceaa8.  Controller is likely dead
> amr0: Too many retries on command 0xc71cdce8.  Controller is likely dead
>
> Thank you in advance!
>
> -Simon
>
>  
We still see these as well.  I've also been ensured that these are
harmless messages.  As far as I can tell from my own investigation, the
behavior has not changed other than the addition of tracking of how many
retries there have been when submitting commands to the controller.  
When the controller mailbox is "busy", the driver must wait before
submitting a command.  If the driver has to retry 1000 times twice
within one second, it logs the messages you are seeing.  This logging
was simply not present before 7.1.

As I've said and been told, the message is harmless if your machine is
still responding.
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Re: [Fwd: Re: amr driver issues in 7.1-RELEASE]

by Simon-14 :: Rate this Message:

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>> It appears this has not been fixed in 7.1-p4 I've been waiting to upgrade due
>> to this but was forced after latest root exploit was found recently. Upon MySQL
>> upgrade, running mysql_upgrade which upgrades and checks all the tables,
>> I got 2 of these messages while a large ,1.4G, mysql table was being dumped
>> to array so it could be repaired. I don't know what to make of this error and
>> are not sure if it could be safely ignored.
>>
>> amr0: Too many retries on command 0xc71ceaa8.  Controller is likely dead
>> amr0: Too many retries on command 0xc71cdce8.  Controller is likely dead
>>
>> Thank you in advance!
>>
>> -Simon
>>
>>  
>We still see these as well.  I've also been ensured that these are
>harmless messages.  As far as I can tell from my own investigation, the
>behavior has not changed other than the addition of tracking of how many
>retries there have been when submitting commands to the controller.  
>When the controller mailbox is "busy", the driver must wait before
>submitting a command.  If the driver has to retry 1000 times twice
>within one second, it logs the messages you are seeing.  This logging
>was simply not present before 7.1.

>As I've said and been told, the message is harmless if your machine is
>still responding.


Well, I have several machines with same megaraid controller and I'm only seeing
this on one of them thus far. The load on this one is not grossly different from that
of others, so now I wonder why I only get it on this machine.

Thanks for your input!

-Simon


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Re: [Fwd: Re: amr driver issues in 7.1-RELEASE]

by Simon-14 :: Rate this Message:

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On Fri, 03 Apr 2009 08:23:03 -0400, Steve Polyack wrote:


>> It appears this has not been fixed in 7.1-p4 I've been waiting to upgrade due
>> to this but was forced after latest root exploit was found recently. Upon MySQL
>> upgrade, running mysql_upgrade which upgrades and checks all the tables,
>> I got 2 of these messages while a large ,1.4G, mysql table was being dumped
>> to array so it could be repaired. I don't know what to make of this error and
>> are not sure if it could be safely ignored.
>>
>> amr0: Too many retries on command 0xc71ceaa8.  Controller is likely dead
>> amr0: Too many retries on command 0xc71cdce8.  Controller is likely dead
>>
>> Thank you in advance!
>>
>> -Simon
>>
>>  
>We still see these as well.  I've also been ensured that these are
>harmless messages.  As far as I can tell from my own investigation, the
>behavior has not changed other than the addition of tracking of how many
>retries there have been when submitting commands to the controller.  
>When the controller mailbox is "busy", the driver must wait before
>submitting a command.  If the driver has to retry 1000 times twice
>within one second, it logs the messages you are seeing.  This logging
>was simply not present before 7.1.

>As I've said and been told, the message is harmless if your machine is
>still responding.


I just wanted to follow up and let the list know my instance of this error
was being caused by faulty drives. If you get this message, I would be
concerned. Backup your data and run every single drive connected to
this controller via manufacturer's diagnostic full test. A single faulty drive
in RAID setup can cause mediocre performance and this error to show
up.

-Simon


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