ONStore filer backups to locally attached tape drives fail when spanning to second tape (4046466)

Title: When using ONStore filers NDMP backups to locally attached tape drives fail when spanning to second tape
Date: 07/2009
NV Version: all
OS Version: all
Application version: NDMP
Plugin version: all versions

Description:
When backing up ONStore filers using the NDMP plugin and the backups spans to a second tape the backup fails with error 'Command failed, re-initializing driver'

Symptoms:

Typical entry seen in binary log

Error 2009/07/12 04:53:27 0 Media VEGA-Netvault Command failed, re-initializing driver


Entries seen in binary log sub text

CAMNDMP :3756 143 0 23143 Block Number = 0
SCSI :3756 16 0 23143 CMD STATUS 'CHECK CONDITION' [2]
SCSI :3756 17 0 23143 CMD SENSE KEY 'NO SENSE FMK ' [0] - ASC 00 ASCQ 00
SCSI :3756 18 0 23143 CMD SENSE INFO 'NO ADDITIONAL SENSE'


SCSI :0684 16 0 35324 CMD STATUS 'CHECK CONDITION' [2]
SCSI :0684 17 0 35324 CMD SENSE KEY 'NO SENSE EOM ' [0] - ASC 00 ASCQ 00
SCSI :0684 18 0 35324 CMD SENSE INFO 'NO ADDITIONAL SENSE'

1/ Stop netvault

2/ navigate to /netvault/config directory

3/ edit file called ndmpversions.cfg

Find the ONStore mover entry and modify as below

Before:

[ONStor-V4:Mover Server]
Tape Postfix=h
Allow nonNdmp Transfers=true
Backup window=true

After:

[ONStor-V4:Mover Server]
Tape Postfix=h
Allow nonNdmp Transfers=true
Backup window=true
Test On Sync=FALSE

5/ Save and start netvault


Explanation:

This problem seems to be down to the ONStore filer not reporting space left estimates either accurately enough or frequently enough.