Hi,
disabling hw-compression is easyyou have 2 choices:
1.) dip-switches/jumpers on drive
(best solution, but more work at the moment,
lookup the needed switch in your drive-manual)
2.) mt -f /dev/nst0 datcompress off
(faster for the moment, but you have to re-apply it
after every reboot/scsi-reset.)
Christoph
[EMAIL PROTECTED] schrieb:
Selon Christoph Scheeder <[EMAIL PROTECTED]>:
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
[EMAIL PROTECTED] 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
