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#1
April 15th 04, 11:04 AM
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Tapedrive performance / shoes shining?
Hello,
we have a Compaq/HP MSL6030 tape library (with one LTO2 drive) that is connected to a dedicated Ultra320 SCSI card on a Compaq ML370 (PIII 933Mhz/256MB). We use BackupExec 9.0 on Windows 2000 with the Veritas tape drivers. The best backup transferrate we see (on a local RAID5 disk set with relatively large files ~100KB/5MB, 90GB total) is around 640MB/min (average). The LTO drive itself should be capable of 1920MB/min (32MB/sec) a.f.a.i.k. Is there any way to check what the bottleneck is here? The verify speed is very high at 2200MB/min (higher then the theoretical maximum). Any ideas? -- Benno... 
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#2
April 15th 04, 11:41 AM
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"Benno..." wrote in message
... Hello, we have a Compaq/HP MSL6030 tape library (with one LTO2 drive) that is connected to a dedicated Ultra320 SCSI card on a Compaq ML370 (PIII 933Mhz/256MB). We use BackupExec 9.0 on Windows 2000 with the Veritas tape drivers. The best backup transferrate we see (on a local RAID5 disk set with relatively large files ~100KB/5MB, 90GB total) is around 640MB/min (average). The LTO drive itself should be capable of 1920MB/min (32MB/sec) a.f.a.i.k. Is there any way to check what the bottleneck is here? The verify speed is very high at 2200MB/min (higher then the theoretical maximum). Any ideas? -- Benno... Monitor the disk that holds the BackupExec index data. There's a good chance it is the bottleneck due to BE needing to update it's index database for each file it processes. Rob
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