Personnaly I use that and it works well:

define tapetype HP-DAT24 { 
    comment "HP SureStore DAT24"# disabled compression
    length 12288 mbytes         # 12 GB
    filemark 0 kbytes
    speed 1024 kbytes
} 

I measured that my DDS3 is:
_ tape capacity 12 274 139 136 bytes
_ file marks 2 708 758 bytes

and I still didn't update my dumptype definition ;-)



On Fri, 17 Oct 2003 14:10:12 +0530
"Rohit" <rohit AT genetechindia DOT com> wrote:

> Hey paul, that's the culprit I guess. This is the tapetype which 
> I'm using in amanda.conf:
> 
> define tapetype HP-DAT {
>     comment "DAT tape drives"
>     # data provided by Rob Browning <rlb AT cs.utexas DOT edu>
>     length 1930 mbytes
>     filemark 111 kbytes
>     speed 468 kbytes
> }
> 
> Btw, how do I get these details for my tape? What I use is 
> HP-DAT DDS3 (C5708A) 12/24 GB tape. 
> 
> Thanks!
> 
> Rohit
> 
> ----- Original Message ----- 
> From: "Paul Bijnens" <paul.bijnens AT xplanation DOT com>
> To: <rohit AT genetechindia DOT com>
> Cc: <amanda-users AT amanda DOT org>
> Sent: Friday, October 17, 2003 1:49 PM
> Subject: Re: more doubts
> 
> 
> > Rohit wrote:
> > > From: "Jon LaBadie" <jon AT jgcomp DOT com>
> > > 
> > >> I don't think your assumption is correct.  I think runspercycle 
> > >> "ignores" the units part.  So it was thinking you had a total of 5
> > >> runs per dumpcycle.
> > > 
> > > 
> > > I read it somewhere it this mailing list that runspercycle does 
> > > compute based on units specified. Also, amadmin balance command 
> > > showed "estimated 35 runs per dumpcycle" in the last line when I had
> > > runspercycle as 5 weeks. When I removed 'weeks' from that line --
> > > then it showed correct value -- 5 runs per dumpcycle.
> > 
> > runspercycle does indeed take a unit if specified.
> > 
> > The program doesn't even check if a unit is appropriate for the
> > config, so you could just as well say:
> > tapecycle 20 bps
> > 
> > or specify in tapetype:
> > 
> > speed 400000 weeks
> > 
> > instead of (rounded)  2800 kps.  Really funny/confusing.
> > 
> > 
> > 
> > The possible units are:
> > 
> > keytab_t numb_keytable[] = {
> >      { "B", MULT1 },
> >      { "BPS", MULT1 },
> >      { "BYTE", MULT1 },
> >      { "BYTES", MULT1 },
> >      { "DAY", MULT1 },
> >      { "DAYS", MULT1 },
> >      { "INF", INFINITY },
> >      { "K", MULT1K },
> >      { "KB", MULT1K },
> >      { "KBPS", MULT1K },
> >      { "KBYTE", MULT1K },
> >      { "KBYTES", MULT1K },
> >      { "KILOBYTE", MULT1K },
> >      { "KILOBYTES", MULT1K },
> >      { "KPS", MULT1K },
> >      { "M", MULT1M },
> >      { "MB", MULT1M },
> >      { "MBPS", MULT1M },
> >      { "MBYTE", MULT1M },
> >      { "MBYTES", MULT1M },
> >      { "MEG", MULT1M },
> >      { "MEGABYTE", MULT1M },
> >      { "MEGABYTES", MULT1M },
> >      { "G", MULT1G },
> >      { "GB", MULT1G },
> >      { "GBPS", MULT1G },
> >      { "GBYTE", MULT1G },
> >      { "GBYTES", MULT1G },
> >      { "GIG", MULT1G },
> >      { "GIGABYTE", MULT1G },
> >      { "GIGABYTES", MULT1G },
> >      { "MPS", MULT1M },
> >      { "TAPE", MULT1 },
> >      { "TAPES", MULT1 },
> >      { "WEEK", MULT7 },
> >      { "WEEKS", MULT7 },
> >      { NULL, IDENT }
> > };
> > 
> > 
> > > Attached to this email is snippet of amdump log file. Amanda
> > > identified total size of approx 25 GB to be backed up. Whereas by
> > > tape could could only take in approx 19 GB (though it is 12/24 GB
> > 
> > 
> >  From your logfiles:
> > 
> > > DELAYING DUMPS IF NEEDED, total_size 25877861, tape length 1976320 
> > > mark 111
> > 
> > 
> > It seems amanda is asuming your tapelength is only 1_976_320 Kbytes,
> > that only 1.9 Gbyte, not 19 Gyte.  The above resembles like a DDS2
> > drive with 90 meter tapes to me.
> > 
> > Have a look at "tapetype ..." and the corresponding "define tapetype
> > ..." in your amanda.conf.  Maybe you have a duplicate define?
> > 
> > 
> > 
> > -- 
> > 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          *
> > ***********************************************************************
> >