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Performance of NetBackup and 4/40

Michael Taylor_1
Occasional Visitor

Performance of NetBackup and 4/40

Is anyone using Veritas NetBackup 3.4 on Win2k with a 4/40 library?

We intermittently get one stream of a backup running really slow. If you kill it and re-submit it will often run at 10x the original speed (3.5MB/s compared to 300KB/s).

Any ideas?
2 REPLIES
BR659932
Regular Advisor

Re: Performance of NetBackup and 4/40

Hi.

Check that the backup blocksize is correct. Go to www.hp.com, click on support and search for backup blocksize for recommendations and slow backup for further info.

HTH,
~A~
BR659932
Regular Advisor

Re: Performance of NetBackup and 4/40

... oh yes, another thing.

The installation instructions say that you should have one SCSI HBA / tape drive, so 4 HBAs for the 4/40 library. Fewer than that will damage the performance.

If you daisy-chain the device, put the drives first on the bus and the library controller last.

~A~