Thanks for the advice, _most_ responsive list I belong to! cheers! gary 2011/12/19 Radosław Korzeniewski <[email protected]>: > Hello, > > 2011/12/16 gary artim <[email protected]> >> >> 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 > [email protected]
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