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Title
SnapMirror to Tape backup to a device attached to a Smart Client fails with a 'Failed to start backup: Unknown error -1' error. -
Description
The following messages and errors appear within the NetVault logs:
1] Information 2014/11/12 07:55:44 57812 Schedule netvault0 Starting phase 1 on netvault0
2] Job Message 2014/11/12 07:55:45 57812 Data Plugin netvault0 Host 'op-fsos1-pp', ID '0151705088', OS 'NetApp', Version 'NetApp Release 8.2P4 7-Mode'
3] Job Message 2014/11/12 07:55:45 57812 Data Plugin netvault0 NDMP SnapMirror to Tape 7.6.116 Backup
4] Background 2014/11/12 07:55:45 57812 Data Plugin netvault0 Filer advises DATA_BLOCK_SIZE is 240 KB
5] Information 2014/11/12 07:55:45 57812 Data Plugin netvault0 Block size requested is 240 KB
6] Job Message 2014/11/12 10:11:23 57812 Media netvault0 (gmh-backup-gmh: SL_DEC90302EY (HP MSL G3 Series)) Media in 'DRIVE 1:gmh-backup-gmh' assigned to job ready for data transfer
7] Background 2014/11/12 10:12:26 57812 Data Plugin netvault0 NDMP Backup Environment Variable 'FILESYSTEM' = '/vol/fsosesx1vp_fc0'
8] Background 2014/11/12 10:12:26 57812 Data Plugin netvault0 NDMP Backup Environment Variable 'DIRECT' = 'N'
9] Job Message 2014/11/12 10:12:26 57812 Data Plugin netvault0 Backup Request
With sub text:
Backup Environment:
SMTAPE_DELETE_SNAPSHOT = Y
FILESYSTEM = /vol/fsosesx1vp_fc0
DIRECT = N
10] Information 2014/11/12 10:12:26 57812 Data Plugin netvault0 NDMP version is 4
11] Error 2014/11/12 10:27:58 57812 Data Plugin netvault0 Failed to start backup: Unknown error -1
With sub text:
NET 15 110 102758 Fatal error during TCP receive: Connection timed out
XDR 158 -1 102758 Failed to receiving XDR data
NDMP 5 2 102758 Error on Ndmp Channel
NDMP 89 0 102758 Ndmp channel has disconnected
MSGWAIT 37 0 102758 Desired source has gone down
NDMP 1715 0 102758 Failed to receive reply 40a, sequence 15
12] Error 2014/11/12 10:27:58 57812 Media gmh-backup-gmh gmh-backup-gmh SL_HU19014K07 (HP Ultrium 4-SCSI): had transfer aborted
As you can see from the sub text error, that this points to a network issue outside of NVBU.
The following NVBU environment details are…
NetVault Server: 9.2 installed on SuSE 11.
NetVault Client: 9.2 installed on SuSE 11 with the tape library attached here i.e. a Smart Client.
So the backup channel is from the NetApp Filer > NetVault Server with SMTT Plugin > Smart Client > Backup device i.e. the backup job has to communicate down a very long channel.
Ideally the Filer should have the tape library attached there via FC and setup with shared drives to all Clients for a more faster and reliable backup channel.
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