On Thu, Jan 04, 2018 at 04:58:13PM -0500, Ned Danieley wrote:
> On Thu, Jan 04, 2018 at 09:43:35PM +0000, Debra S Baddorf wrote:
> > 
> > > On Jan 4, 2018, at 11:59 AM, Ned Danieley <[email protected]> wrote:
> > > 
> > > 
> > > I'm using
> > > 
> > > taperalgo largestfit
> > > 
> > > which I assume means that amanda will write to tape the largest DLE
> > > available. I have 'runtapes' set to 2, and occasionally I'll see amanda
> > > move on to the second tape when the first tape is reporting around 80% 
> > > full.
> > > I'm dumping almost 200 DLE, so it seems like there ought to be some DLEs
> > > that would fit in the remaining 20%. is there any way to find out (after
> > > the fact) what DLEs were in the queue? I've looked at the taper debug file
> > > but it just seems to have a list of each DLE as it is written.
> > > 
> > > I'm using LTO6 tapes, so I should have about 2.5 TB to work with. I know
> > > about the ability to split DLEs, but I'm not ready to take that step.
> > > 
> > 
> > Did you actually test the size of your own tapes? 
> > 
> 
> ah, that makes sense. no, I haven't run 'amtapetype'; I just assumed that
> the rated capacity would be accurate. I'll give it a try; in the meantime,
> has anyone run 'amtapetype' on an LTO6 tape? I have an HP Ultrium 6 drive.

That 2.5TB is likely marketing-speak using decimal number.
Switching to binary TB would immediately reduce the size
by nearly 250GB (about 9% of the listed capacity).

jl
-- 
Jon H. LaBadie                 [email protected]
 11226 South Shore Rd.          (703) 787-0688 (H)
 Reston, VA  20190              (703) 935-6720 (C)

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