[dm-devel] i/o error due to all path failure with rdac

[Moger, Babu]

Yes, It is working fine with this patch. Now my online/offline test is running fine. Thank you very much. That was really a quick fix.

I am still learning the device mapper. Hopefully I will be some help in the future.

Thanks
Babu Moger

-----Original Message-----
From: Chandra Seetharaman [mailto:sekharan at us.ibm.com]
Sent: Thursday, October 30, 2008 6:35 PM
To: Moger, Babu
Cc: device-mapper development; linux-scsi at vger.kernel.org
Subject: RE: [dm-devel] i/o error due to all path failure with rdac

Can you try this patch.
---------
Signed-off-by: Chandra Seetharaman <sekharan at us.ibm.com>

Index: linux-2.6.27/drivers/scsi/device_handler/scsi_dh_rdac.c
===================================================================
--- linux-2.6.27.orig/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ linux-2.6.27/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -386,6 +386,7 @@ static int check_ownership(struct scsi_d
        struct c9_inquiry *inqp;

        h->lun_state = RDAC_LUN_UNOWNED;
+       h->state = RDAC_STATE_ACTIVE;
        err = submit_inquiry(sdev, 0xC9, sizeof(struct c9_inquiry), h);
        if (err == SCSI_DH_OK) {
                inqp = &h->inq.c9;
---

On Thu, 2008-10-30 at 17:21 -0600, Moger, Babu wrote:
> Looks like eventually we get rport failure after the controller offline.
>
>
> I have attached the messages file.  I am running raw IO.
>
> Also, please note that I have added following lines in check_sense. This condition (quiescence) should be retried.
>
>
> case UNIT_ATTENTION:
>                 if ((sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00) ||
>                     (sense_hdr->asc == 0x8b && sense_hdr->ascq == 0x02))
>                         /*
>                          * Power On, Reset, or Bus Device Reset, just retry.
>                          */
>                         return ADD_TO_MLQUEUE;
>
>
>
> Thanks
> Babu Moger
>