Thanks for the advice, _most_ responsive list I belong to! cheers! gary

2011/12/19 Radosław Korzeniewski <rados...@korzeniewski.net>:
> Hello,
>
> 2011/12/16 gary artim <gar...@gmail.com>
>>
>> No, just Spool Attributes = yes. g.
>>
>
> A "direct" backup from FD into a SD tape device is performed with a little
> buffering and require more computation, disk seeks and context switching. It
> is a single, complicated chain with two threads one for FD and one for SD
> connected through logical network layer (even when a full backup is
> performed on local machine). With this chain it is very hard to get a full
> LTO speed. As opposite when you perform SD data spooling, you can easy
> achieve a full LTO speed because a writing chain (despooling) in SD is very
> simple and effective. Unfortunately doing a data spool takes a long time and
> slow down an overall backup speed.
>
> best regards
> --
> Radosław Korzeniewski
> rados...@korzeniewski.net

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