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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"Benno..." <0@0.invalid> wrote in message
news:407e5e45$0$5069$4d4ebb8e@news.nl.uu.net...
> 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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