On Thu, Jan 04, 2018 at 09:43:35PM +0000, Debra S Baddorf wrote: > > > On Jan 4, 2018, at 11:59 AM, Ned Danieley <ned.danie...@duke.edu> 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. > > > > -- > > Ned Danieley (ned.danie...@duke.edu) > > Department of Biomedical Engineering > > Box 90281, Duke University > > Durham, NC 27708 (919) 660-5111 > > > > https://urldefense.proofpoint.com/v2/url?u=http-3A__dilbert.com_strips_comic_2012-2D02-2D11_&d=DwIGaQ&c=imBPVzF25OnBgGmVOlcsiEgHoG1i6YHLR0Sj_gZ4adc&r=seIgoLdvEn-8badm2JmCmh78EJ9F9-Hw-LulwGbFPZI&m=DGzKNKCqh_8C-Y1Y3Smdu29gOMu_5Y82AnrH-oAP-vg&s=dB2_g2FDMHahFgcGA1CJLdbMwaXZJjrvHGFYP_pmwGM&e= > > > > > Did you actually test the size of your own tapes? (There’s a proceedure > that does this …. help me > out with the name, guys?) > > Amanda, I believe, uses your number to decide how much space is left on the > tape. It’ll > pick the biggest DLE that ought to fit in that spot (“largestfit”). If > you’ve over-estimated > the tape size, then this DLE will NOT fit. At that point, amanda can’t > back up and try > a smaller DLE. It merely stops trying with that DLE (saves it for later) > and moves on to > the next tape. > At this point, the “largestfit” is probably a bigger DLE, since the > whole tape is available > for the second tape. > > Rinse and repeat. > > So — maybe tell amanda a smaller size for the tape? Then it’ll try a > smaller “last” DLE, > and it will actually fit. > > At least, this is my understanding of how she works.
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. -- Ned Danieley (ned.danie...@duke.edu) Department of Biomedical Engineering Box 90281, Duke University Durham, NC 27708 (919) 660-5111 http://dilbert.com/strips/comic/2012-02-11/
