Sun Storage 7000 Unified Storage System: NDMP tape cloning failed to establish connection.

Asset ID:	1-72-1326200.1
Update Date:	2012-06-20
Keywords:

Solution Type Problem Resolution Sure

Solution 1326200.1 : Sun Storage 7000 Unified Storage System: NDMP tape cloning failed to establish connection.

Applies to:

Sun Storage 7210 Unified Storage System - Version Not Applicable to Not Applicable [Release N/A]
Sun Storage 7310 Unified Storage System - Version Not Applicable to Not Applicable [Release N/A]
Sun ZFS Storage 7120 - Version Not Applicable to Not Applicable [Release N/A]
Sun Storage 7410 Unified Storage System - Version Not Applicable to Not Applicable [Release N/A]
Sun Storage 7110 Unified Storage System - Version Not Applicable to Not Applicable [Release N/A]
7000 Appliance OS (Fishworks)
NAS head revision : not dependent
BIOS revision : not dependent
ILOM revision : not dependent
JBODs Model : not dependent
CLUSTER related : not dependent

Symptoms

On a Sun Storage 7000 Unified Storage System NDMP backup and restore has been successful, it is not possible to clone a tape, it fails with "Connect error: Connection refused"

To discuss this information further with Oracle experts and industry peers, we encourage you to review, join or start a discussion in the My Oracle Support Community - 7000 Series ZFS Appliances

Cause

For troubleshooting purpose NDMP daemon was started in debug mode and the collected message file contains "connection refused" messages due to a failed forward/reverse IP address resolution on DNS server.

Please contact Oracle Support to start the NDMP daemon in debug mode.

Debug mode is no longer necesary starting with the 2011.1.1.0 appliance code where ndmp logging is always enabled

For procedure to start NDMP in debug mode see "How to Enable NDMP debugging". If you are unable to access this link please contact a member of the NAS Support team.

Sun Storage 7000 Unified Storage System logs:
Debug.sys

Mar 21 04:59:15 brain /usr/lib/ndmp/ndmpd[19178]: [ID 702911 daemon.error] Failed to send command to tape: No such file or directory.

ndmp debug message:

3/21 4:59:15 DEBUG: [16][ndmp_open_list_add:1586]:conn: 0x083447c8, dev: /dev/rmt/12n, sid: 12,=lun: 0

3/21 4:59:15 DEBUG: [16][common_tape_open:1371]:Tape is opened fd: 14

3/21 4:59:15 DEBUG: [16][ndmp_process_messages:1308]:no more messages in stream buffer

3/21 4:59:15 DEBUG: [16][nlp_event_rv_set:1279]:rv: 1

3/21 4:59:15 DEBUG: [16][ndmp_process_messages:1200]:reply_expected: FALSE

3/21 4:59:15 DEBUG: [16][ndmp_process_messages:1280]:received request: 0x303

3/21 4:59:15 DEBUG: [16][ndmpd_tape_mtio_v2:396]:ioctl MTIO rc:-1, cmd:1, retry:0, error: 5

3/21 4:59:15 ERROR: [16][ndmpd_tape_mtio_v2:408]:Failed to send command to tape: No such file or directory.

3/21 4:59:15 DEBUG: [16][ndmpd_tape_mtio_v2:409]:ioctl(MTIOCTOP) error: No such file or directory.

3/21 4:59:15 DEBUG: [16][ndmpd_tape_mtio_v2:396]:ioctl MTIO rc:0, cmd:5, retry:0, error: 2

3/21 4:59:17 DEBUG: [17][ndmp_connect_sock_v3:2078]:addr 74.55.25.138:64067

3/21 4:59:18 DEBUG: [17][ndmp_connect_sock_v3:2091]:Connect error: Connection refused

3/21 4:59:18 DEBUG: [17][ndmp_process_messages:1308]:no more messages in stream buffer

The connection refused message was logged due to incorrect DNS reverse lookup for Sun Storage 7000 Unified System.

Networker log:

42597:nsrndmp_clone: mover connect: failed to establish connection

42803:nsrndmp_clone: Failed to send the MOVER_CONNECT message to the NDMP tape server.

Configuration:

DMA is Networker 7.5.3
Tape library and tape drives are connected to 7410 through 4GB FC HBA.

Solution

To avoid this error and ensure correct operation of the ZFS Storage Appliance, a fully working DNS environment is required which is able to do forward and reverse address resolution for the Appliance.

Back to <Document 1387930.1> Sun Storage 7000 Unified Storage System: How to Troubleshoot NDMP issues".

References

<NOTE:1387930.1> - Sun Storage 7000 Unified Storage System: How to Troubleshoot NDMP Issues

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