Networker

[Networker] Slow backups to 2nd tape

2003-05-23 12:42:14
Subject: [Networker] Slow backups to 2nd tape
From: John Hope-Bailie <johnhb AT SOURCECONSULTING.CO DOT ZA>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Fri, 23 May 2003 18:46:30 +0200
Good-day,
We have encountered a baffling problem.
Environment:
NetWorker 6.1.3 on Tru64 with Oracle PS on Tru64 Cluster with NetWorker
Module for Oracle.
LTO drives in STKL700 Silo which is Fibre-channel San Connected with ACSLS
and using NetWorker Dynamic Drive Sharing
The NetWorker Server is a separate host.  The problem Oracle host is a
Storage Node
Description:
The backup starts, runs well at 16MB/sec until the 1st tape is full.
The  2nd tape loads, crawls along at 300KB/s, which is impossible.
It happens with any backup
Workaround:
Stop Job, re-start the NetWorker server,  and re-start the job.
It resumes at full speed on the same tape until next tape change.
Then it crawls again.
This cycle continues until the job finishes.
Considerations:
We thought it might be ongoing media DB or client file index corruption
being fixed by index cross-checking which occured when the system was
rebooted.
We have run NSRIM -X  and NSRCK - L1,2,3,4,5,6
Not fixed yet.
Any ideas ?
regards,
John Hope-Bailie





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