Mike Brodbelt wrote:

Tape driver is a Quantum DLT7000, with DLT IV media. Native capacity
should be 35Gb, and I'm running Amanda with host based compression, and
compression switched off on the drive. The tapetype definition is:-

define tapetype DLT-7000 {
    comment "Quantum Bluedisc Digital Linear Tape 7000"
    length 35000 mbytes
    filemark 8 kbytes
    speed 1250 kbytes
}

A listing of the output size to tape:-

Output Size (meg)       31855.4    31855.4        0.0
Original Size (meg)     66922.0    66922.0        0.0
Avg Compressed Size (%)    47.6       47.6        --

It would be nice if you showed a few lines further in the report
where the drive bumped into end of tape. IN the Notes secion you
see something like:

NOTES:

(From my report, writing on "35 Gbyte AIT-1 tapes").
It shows my tapes are not really 35 Gbyte the 35 Gbyte is usually
measured in marketing terms where K=1000 and M=1000*1000 and
G=1000*1000*1000. Amanda uses the K=1024, M=1024*1024, G=1024*1024*1024.

If you hit consistently into eot at about 70-80% of the normal capacity,
I strongly believe you still have compression enabled.  If it's only
now and then, and at different capacities, maybe cleaning the tapedrive
helps.

Running amtapetype takes about 5 hours if you, give it a realistic
estimated tapesize:

        amtapetype -e 35g

(and amtapetype will tell you too, if you still have compression enabled).

--
Paul Bijnens, Xplanation                            Tel  +32 16 397.511
Technologielaan 21 bus 2, B-3001 Leuven, BELGIUM    Fax  +32 16 397.512
http://www.xplanation.com/          email:  Paul.Bijnens AT xplanation DOT com
***********************************************************************
* I think I've got the hang of it now:  exit, ^D, ^C, ^\, ^Z, ^Q, F6, *
* quit,  ZZ, :q, :q!,  M-Z, ^X^C,  logoff, logout, close, bye,  /bye, *
* stop, end, F3, ~., ^]c, +++ ATH, disconnect, halt,  abort,  hangup, *
* PF4, F20, ^X^X, :D::D, KJOB, F14-f-e, F8-e,  kill -1 $$,  shutdown, *
* kill -9 1,  Alt-F4,  Ctrl-Alt-Del,  AltGr-NumLock,  Stop-A,  ...    *
* ...  "Are you sure?"  ...   YES   ...   Phew ...   I'm out          *
***********************************************************************