[DRBD-user] Found a new disk flush error code

[Thomas Reinhold]

Thanks again. The driver module is sas_megaraid (I'm using Debian  
2.6.18 dm-crypt, not RedHat).


Am 15.12.2008 um 15:35 schrieb Lars Ellenberg:
> On Mon, Dec 15, 2008 at 03:14:28PM +0100, Thomas Reinhold wrote:
>> Thanks for your quick answer.
>>
>> This is the complete error message (I shoud have posted that in the  
>> first
>> place, sorry):
>>
>>
>>    Dec 11 21:47:56 bftest-54 kernel: FAILED
>>    Dec 11 21:47:56 bftest-54 kernel:   status = 1, message = 00,  
>> host = 0, driver = 08
>>    Dec 11 21:47:56 bftest-54 kernel:   <6>sd: Current: sense key:  
>> Illegal Request
>>    Dec 11 21:47:56 bftest-54 kernel:     Additional sense: Invalid  
>> command operation code
>
> well, that is from the scsi layer.
> and yes, that is exactly the decoded scsi_execute_req return value
> 0x8000002 ;)
>
>>    Dec 11 21:47:56 bftest-54 kernel: drbd0: local disk flush failed  
>> with
>>    status 134217730
>>
>> What I forgot to mention is that DRBD runs on top of a dm device  
>> (dm-crypt),
>> which in turn runs on top of the raid array. Could that cause the  
>> problem?
>
> I was not aware that redhat has patched its 2.6.18 dm-crypt to
> (pretend to?) support flushed/barriers.
>
> but that should be irrelevant in this context.
>
> apparendly your lower level driver (what driver module is in use?)  
> does
> not support flush requests, or something in the device mapper stack
> converts the flush request into something that the driver does not
> understand.
>
> we may consider to handle any return value != 0 in the same way in  
> drbd.
> meanwhile, the correct fix is:
>
>>        I have disabled disk flushing for now, and the error  
>> obiously has gone.
>
> -- 
> : Lars Ellenberg
> : LINBIT | Your Way to High Availability
> : DRBD/HA support and consulting http://www.linbit.com
>
> DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
> __
> please don't Cc me, but send to list   --   I'm subscribed
> _______________________________________________
> drbd-user mailing list
> drbd-user at lists.linbit.com
> http://lists.linbit.com/mailman/listinfo/drbd-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.linbit.com/pipermail/drbd-user/attachments/20081215/a763e6c0/attachment.htm