Selon Christoph Scheeder <christoph.scheeder AT scheeder DOT de>:

> Hi,
> please give a bit more details, for example how much data amanda wrote to
> the
> tape, how big you told amanda your tapes are, do u use hw/sw-compression or
> both
> etc....

my tapetype is (after running tapetype on my tapeserver)

define tapetype HP-DAT-DDS2  {
    comment "HP DAT r<E9>sultat produit par tapetype sur parasy "
    length 3264 mbytes
    filemark 15 kbytes
    speed 377 kps
}


datas to be backed up are about 3,5 Go uncompressed and 1,7Go compressed.

I use software compression via amanda 
define dumptype comp-root-tar {
    root-tar
    comment "Root partitions with compression"
    compress client fast
}


> Without these info's we can't tell you what's going on.....
> But a common error is using both hardware and software compression, which
> results in reduced tape capacity as the data writen to tape get's expanden
> by the hardware-compression step.
> on debian you can check if your hw-compression is enabled by using the
> command
> 
> mt -f /dev/your_tape_device datcompress

Ooops, hardware compressoin is turned on also. I've read some comments about
disabling HW compression for amanda to work best.

results is:

parasy:~# mt -f /dev/nst0 datcompress
Compression on.
Compression capable.
Decompression capable


I'm gonne find a way to disable HW compression.

Thanks for your answer. I'l keep you updated.

> 
> It will tell you the status of your hardware.
> Christoph
> 
> heryzo AT simicro-internet DOT mg schrieb:
> > Hi all,
> > 
> > I have the following problems using amanda2.4.2p2-4  on a debian box. Tape
> is HP
> > Surestore DAT with DDS2 4/8Go.
> > 
> > 
> > The dumps were flushed to tape TestConf12.
> > *** A TAPE ERROR OCCURRED: [[writing file: Bad file descriptor]].
> > Some dumps may have been left in the holding disk.
> > Run amflush again to flush them to tape.
> > The next tape Amanda expects to use is: TestConf13.
> > 
> > FAILURE AND STRANGE DUMP SUMMARY:
> >   baleine.ba /var/lib/mysql lev 1 FAILED [out of tape]
> >   ntpaymaste /var/backups lev 1 FAILED [out of tape]
> > 
> > Even if I clean my tape, this problem tend to happen more frequently.
> > Sometimes I have an [Input/Output error] when backing up my filesystems.
> > 
> > Anyone ever had this kind of problem? Any indications or ideas welcome.
> > 
> > Hery Zo
> > 
> 
> 
>