* Nick Brockner <nbrockne AT hamilton DOT edu> [20081107 11:53]:
> LTO4 does not shoe-shine, it has variable speed motors.

yes, you're right but it will stream for xfer rate in the range of
40-120MBs, at least for HP drives. Dunno about the others.

cheers,
jf

> 
> -Nick
> 
> Jean-Francois Malouin wrote:
> >* jp.pozzi AT izzop DOT net <jp.pozzi AT izzop DOT net> [20081106 14:56]:
> >>Hello,
> >>
> >>Some "real" data for LTO4 :
> >>STATISTICS:
> >>                          Total       Full      Incr.
> >>                        --------   --------   --------
> >>Estimate Time (hrs:min)    0:06
> >>Run Time (hrs:min)         1:57
> >>Dump Time (hrs:min)        1:28       1:21       0:07
> >>Output Size (meg)      181368.1   178690.5     2677.6
> >>Original Size (meg)    181368.1   178690.5     2677.6
> >>Avg Compressed Size (%)     --         --         --    (level:#disks
> >>...)
> >>Filesystems Dumped           43         12         31   (1:31)
> >>Avg Dump Rate (k/s)     35031.4    37451.2     6595.0
> >>
> >>Tape Time (hrs:min)        1:19       1:17       0:02
> >>Tape Size (meg)        181368.1   178690.5     2677.6
> >>Tape Used (%)              22.6       22.3        0.3   (level:#disks
> >>...)
> >>Filesystems Taped            43         12         31   (1:31)
> >>Avg Tp Write Rate (k/s) 39421.3    39850.4    22939.1
> >                          ^^^^^^^^
> >                                 |->  Eeek! 
> >
> >If this is indeed for a LTO4, you are shoe-shinning big time!
> >You will wear out the tape heads very very rapidly...
> >
> >jf
> >
> >>USAGE BY TAPE:
> >>  Label               Time      Size      %    Nb
> >>  sauvedata_009       1:19   181368M   22.6    43
> >>
> >>
> >>Regards
> >>
> >>JP Pozzi
> >>
> >>On Mon, 2008-10-27 at 12:28 -0400, Nick Brockner wrote:
> >>>Howdy,
> >>>
> >>>Time to replace the aging DAT changer.
> >>>
> >>>Just looking for some input on what LTO3/4 drives (or libraries) work 
> >>>well with amanda.
> >>>
> >>>Thanks in advance,
> >>>Nick
> >>>
> >>>&#0;
> >>>
> >

-- 
<° >< Jean-François Malouin          McConnell Brain Imaging Centre        
System/Network Administrator        Montréal Neurological Institute
3801 Rue University, Suite WB219, Montréal, Québec, H3A 2B4, Canada