On Fri, Jul 25, 2003 at 09:42:31AM -0700, Joshua D. Bello wrote:
> On Mon, Jul 21, 2003 at 03:18:02PM -0700, Joshua D. Bello wrote:
> > Greetings!  I am writing to find a good tapetype definition for a
> > SDLT-160/320 changer that we have just purchased.  I found no definitions in
> > the FAQ-O-Matic or list archives.  Thanks in advance!
> 
> Well I bit the bullet and ran amtapetype on this drive.  For the benefit
> of anybody else out there who has this drive type (and to save you the
> 40 hours it took for me to run amtapetype!!!), here are my results:
> 
> define tapetype unknown-tapetype {
>      comment "just produced by tapetype prog (hardware compression off)"
>      length 153794 mbytes
>      filemark 13 kbytes
>      speed 2377 kps
> }

I'd suggest something is faulty with your setup,
likely outside of amanda.

The tapetype program should make two complete passes at
nearly the full speed of your drive.  It just dumps data
as fast as it can to the tape drive.  If you see anything
significantly slower I'd be suspcious of the setup.

  160GB / (16MB/sec) is 10000 seconds.
  Times 2 passes is 20000 seconds.
  At 3600 sec/hr, that should take about 6 hours.

That drive has a rated speed of 16MB/sec.
You observed only 2.4MB/sec.

Your capacity and filemark numbers seem reasonable.
But I'd look into why so slow.  Block size settings
on the drive?  Scsi termination?  Bus contention?
Wide scsi interface on a narrow bus?  ???

-- 
Jon H. LaBadie                  jon AT jgcomp DOT com
 JG Computing
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