2 | Removed Path pathname belonging to Dmpnode dmpnodename | DMP deletes the path from the DMP node. | A Logical Unit Number (LUN) is removed from an array. All of the paths to the LUN and the DMP node are removed from the DMP database. A LUN is physically migrated from one array to another. DMP detaches the paths from one enclosure and attaches them to the other.
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2 | I/O error occured on Path pathname belonging to Dmpnode dmpnodename | I/O did not succeed on the path | The path is not available physically due to errors such as an HBA controller failure, a failed LUN, or a network failure. In an A/P (Active/Passive) array, the active processor is disabled.
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3 | Throttled Path pathname belonging to Dmpnode dmpnodename | The number of I/Os simultaneously processed for the DMP node has exceeded the throttle parameters. | If an array is slow to process concurrent I/Os, the number of I/Os may exceed the throttle level set for the DMP nodes. DMP throttling is controlled by the following tunable parameters: DMP throttles the path if the pending I/Os exceed either of these parameters. To tune the throttle values, use the vxdmpadm setattr command to set the queuedepth tunable parameter or the iotimeout tunable parameter.
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3 | Marked as idle Path pathname belonging to Dmpnode dmpnodename | An in-use path has no I/O activity for 60 seconds | |
3 | Enabled Path pathname belonging to Dmpnode dmpnodename | DMP starts using the path for its operations. | A path is enabled manually using the vxdmpadm enable command. A new path is physically added due to the addition of an HBA or a LUN. The DMP device discovery code enables the path. The DMP restore daemon enables a previously disabled path, if the inquiry and open succeeds for that path.
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3 | Disabled Path pathname belonging to Dmpnode dmpnodename | DMP stops using the path for its operations. | A path is disabled manually using the vxdmpadm enable command. If DMP detects an error on a path such as IO failure, inquiry or open IOCTL failure, then the path is disabled. When you disable a host bus adapter (HBA) or remove a LUN, DMP disables all of the paths through the HBA or LUN.
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3 | SCSI error occurred on Path pathname: opcode=SCSI_operation_cCode reported transport failure (status=request_status key=sense_key, asc=additional_sense _code, ascq=additional_ sense_code_qualifier) | DMP bypasses the SCSI strategy to issue SCSI commands to disk and the SCSI command fails with an error for the opcode | SCSI commands can fail if the command cannot reach the disk due to a bus error, a network error, or a SCSI adapter hardware error. DMP SCSI commands like inquiry, open or failover (change from Primary to Secondary controller in an A/P or A/A-A array ) can fail with this error message. There are many types of SCSI errors. Transport failure is just one of them. For complete information about the SCSI errors, refer to the following URL: http://www.isobuster.com/help.php?help=305. Uee the values of the "key", "asc" and "ascq" in the message to look up the failure in the table.
Note: | For details on some typical errors, refer to the conv_scsi_tbl[] array in src/common/lib/vxvm/libvxvm/dmpapi.c |
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3 | Marked as suspect Path pathname belonging to Dmpnode dmpnodename | DMP (vxesd daemon) has detected a change in the network configuration for the path | Any change in the fabric connection between the host and the array can trigger this event. The vxesd daemon issues the VOLOP_DMP_RECONFIG_FABRIC event to notify the vxconfigd daemon that the fabric layout has been changed which initiates device discovery.
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3 | Initiated SAN topology discovery | DMP (vxesd daemon) detects the attach or reattach of a SAN array, and initiates the device discovery | The vxesd daemon uses HBA-specific libraries to detect any changes in the SAN, including the addition of a LUN, removal of a LUN, or the complete removal of the SAN. The vxesd daemon logs this message when the device discovery is started .
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3 | Completed SAN topology discovery | DMP (vxesd daemon) detects the attach or reattach of a SAN array, and completes the device discovery. | The vxesd daemon uses HBA-specific libraries to detect any changes in the SAN, including the addition of a LUN, removal of a LUN, or the complete removal of the SAN. The vxesd daemon logs this message when the device discovery is completed.
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3 | Failover initiated for Dmpnode dmpnodename without/with quiescing | For A/P or A/A-A array, DMP re-directs the I/O from one storage controller to another for the DMP node | The Active/Primary path on the host is manually disabled. An I/O error, inquiry and open IOCTL fails on the Active/Primary path on the host. The Active storage controller on the array is rebooted.
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3 | Reconfiguration is in progress | The vxconfigd daemon ( especially Device Discovery layer) begins the device discovery. | |
3 | Reconfiguration has finished | The vxconfigd daemon ( especially Device Discovery layer) completes the device discovery. | Booting the system or invoking commands like vxdisk scandisks causes vxconfigd to initiate device discovery. When device discovery is completed, the VOL_NOTE_RECONFIG_FINISH event is sent to the vxesd daemon to log this event
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3 | SCSI error occurred on Path pathname: opcode=SCSI_operation_cCode reported reservation conflict (status=request_status key=sense_key, asc=additional_sense _code, ascq=additional_ sense_code_qualifier) | DMP SCSI command for PGR operations such as read, reserve, register, or clear failed on the path for that opcode. | DMP registers PGR keys on paths for Active/Active or Active/Passive cluster applications . If DMP fails to register the PGR keys, this message is logged. DMP performs PGR operations for operations such as the vxdg init command, the vxdg import command, and failover ( I/O re-direction from Primary path to Secondary path).
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3 | I/O retry(%u) on Path pathname belonging to Dmpnode dmpnodename | DMP error analysis detects that the path is not faulty but I/O is not successful. DMP retries the I/O on the path | If I/O fails due to a device reset or busy status of disk , DMP detects that the path is not at fault. DMP receives the action DMP_PATH_OKAY from its error analysis code path. DMP then retries the I/O on the path. The number of retries is controlled by the fixed retry tunable ( dmp_retry_count) or timebound tunable (iotimeout) which can be set using the vxdmpadm setattr command.
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3 | I/O analysis done as error on Path pathname belonging to Dmpnode dmpnodename | DMP detects an I/O error on the path. DMP analyzes the error to determine the necessary action. | DMP detects an I/O error if it could not send the I/O successfully to the underlying disks. This could be due to the LUN not available, network failure, or other errors. Based on the I/O error, DMP analyzes the error to determine the necessary action. For the detailed analysis error code, refer to our source code in src/common/kernel/vxdmp/dmpdefs.h
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4 | Unmarked as idle Path pathname belonging to Dmpnode dmpnodename | When an I/O is sent to an idle path (path that has no I/O activity), DMP removes the idle state from the path. | |