How to speed up Retrospect backup to LTO2 tape-drive... : Retrospect LTO tape backup SCSI

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10/07/2009 at 08:41PM PDT, ID: 24794760

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How to speed up Retrospect backup to LTO2 tape-drive...

Asked by KirkW in Retrospect Backup Utility, OS-X Server, Removable Backup Media

Tags: Retrospect LTO tape backup SCSI

We have an XServe G5 running OS X 10.4.11 connected to a very full 2.7TB XRaid via FibreChannel. We also have an ADIC Fastor2 auto-loader LTO2 tape drive connected to the XServe via a SCSI-2 PCI card (Atto). The backup software is Retrospect 6.

The problem is when we do a backup we only get throughputs of around 500mb/minute (8mb/s), or about 3.5+ days to backup all 2.6TB on the XRaid (just the backup - this does not include the verify).

I feel there is a bottleneck somewhere. While I don't expect to achieve max speeds of the various connections, I do expect to get better than 5-10% of the rated throughput. Is this this the best I can expect or am I making a basic setup/configuration error?

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How to speed up Retrospect backup to LTO2 tape-drive...

Asked by KirkW in Retrospect Backup Utility, OS-X Server, Removable Backup Media

Tags: Retrospect LTO tape backup SCSI

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