Hi again,

Christoph was correct - I dug the manual out and the drive is installed by
default with hardware compression on.

You have to set the first dip switch to off - I'm tapetype - ing as I type.

I will post the results here - if anyone is interested.

Kevin

-----Original Message-----
From: Christoph Scheeder [mailto:christoph.scheeder AT scheeder DOT de]
Sent: 13 August 2002 10:33
To: Kevin Passey
Cc: Amanda (E-mail)
Subject: Re: tapetype for dell powervault 100T DDS4 drive - using 150m
Fuji ta pe


Hi,
your assumptions below are correct,
but the size of your tapetype is a little of of what it should be...
a DDS-4 drive with 150m tapes is supposed to hold about 20GB of data.
the values tapetype reports makes me beleave your tapedrive is
using hardware-compression.
This is bad/a no-no for tapetype.
Tapetype writes random data to the tape to mesure the raw capacity.
if you try to compress that data, it will become bigger, and
tapetype will hit eot much earlier then without compression.
By the way, amanda likes to have control over compression, so it's
a good idea to switch hardwarecompression completly of for drives
used by amanda.
Christoph

Kevin Passey wrote:

> Hi,
> 
> I have just run tapetype for the above drive - it looks like this.
> 
> ./tapetype -f /dev/nst0
> wrote 530067 32kb blocks in 1621 files in 7441 seconds (short write)
> wrote 530076 32kb blocks in 3252 files in 7408 seconds (short write)
> 
> define tapetype unknown-tapetype {
>     comment "just produced by tapetype program"
>     length 16564 mbytes
>     filemark 0 kbytes
>     speed 2284 kps
> }
> 
> I have used a 150m DG4-150 Fujifilm 4mm tape.
> 
> I presume I just include this code in the amanda.conf file.
> 
> One question I need help on - does it matter that the tapetype is un-known
-
> or can I just include it like this:-
> 
> define tapetype PV100T-DDS4 {
>     comment "PowerVault 100T DDS4"
>     length 16564 mbytes
>     filemark 0 kbytes
>     speed 2284 kps
> }
> 
> Thanks in advance
> 
> Kevin Passey
> 
>