On 01/09/2011 07:06 AM, maximilian attems wrote:
> Seen in RH 2.6.32. Applies fine to latest Debian 2.6.32.
> Please consider backport to longterm 2.6.32 and 2.6.33.
> 
> RH patch header says that:
> "Netapp is now supporting ALUA, and is hitting a bug
> where they get:

The patch below is not for a Netapp device, but rather a virtual SCSI
device on IBM Power systems. 

-Brian


> 
> kernel: sd 7:0:0:1: Device not ready: <6>: Current: sense key: Not Ready
> kernel:     Add. Sense: Logical unit not accessible, asymmetric access
> state transition
> 
> and the IO is failed.
> 
> This is a retryable error, and the scsi_dh_alua is already set up
> to detect and retry it. Netapp devices are not yet in the alua
> list though, so this patch adds their boxes to it
> 
> Patch was made and tested by Netapp. I do not have any netpapp boxes
> that support this feature and the netapp sim does not either,
> so I just ran with the patch to check that it fails correctly
> on older boxes that do not support alua."
> 
> 
> thank you.
> 
> ----- Forwarded message from Linux Kernel Mailing List 
> <[email protected]> -----
> 
> Date: Sat, 27 Feb 2010 02:02:15 GMT
> From: Linux Kernel Mailing List <[email protected]>
> To: [email protected]
> Subject: [SCSI] scsi_dh_alua: Add IBM Power Virtual SCSI ALUA device to dev
>       list
> 
> Gitweb:     
> http://git.kernel.org/linus/22963a37b3437a25812cc856afa5a84ad4a3f541
> Commit:     22963a37b3437a25812cc856afa5a84ad4a3f541
> Parent:     cd4a8814d44672bd2c8f04a472121bfbe193809c
> Author:     Brian King <[email protected]>
> AuthorDate: Fri Feb 19 10:08:31 2010 -0600
> Committer:  James Bottomley <[email protected]>
> CommitDate: Fri Feb 19 10:52:54 2010 -0600
> 
>     [SCSI] scsi_dh_alua: Add IBM Power Virtual SCSI ALUA device to dev list
>     
>     Adds IBM Power Virtual SCSI ALUA devices to the ALUA device handler.
>     
>     Signed-off-by: Brian King <[email protected]>
>     Signed-off-by: James Bottomley <[email protected]>
> ---
>  drivers/scsi/device_handler/scsi_dh_alua.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c 
> b/drivers/scsi/device_handler/scsi_dh_alua.c
> index ee372bf..bc9e94f 100644
> --- a/drivers/scsi/device_handler/scsi_dh_alua.c
> +++ b/drivers/scsi/device_handler/scsi_dh_alua.c
> @@ -718,6 +718,7 @@ static const struct scsi_dh_devlist alua_dev_list[] = {
>       {"Pillar", "Axiom" },
>       {"Intel", "Multi-Flex"},
>       {"NETAPP", "LUN"},
> +     {"AIX", "NVDISK"},
>       {NULL, NULL}
>  };
> 
> --
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> ----- End forwarded message -----


-- 
Brian King
Linux on Power Virtualization
IBM Linux Technology Center


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