Amanda-Users

Tape slow...

2004-12-01 03:08:02
Subject: Tape slow...
From: Nicki Messerschmidt <amanda-u AT alienn DOT net>
To: "amanda-users AT amanda DOT org" <amanda-users AT amanda DOT org>
Date: Wed, 01 Dec 2004 08:57:05 +0100
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Hi list,
I have a very strange phenomenon. There is a server with an Seagate
Scirroco 12/24Gb DDS3 drive attached. Onto this drive I can put data via
'dd if=/dev/zero of=/dev/nst0 bs=1024 count=100000' (100Mb) in about
thirty seconds. This means a transfer rate of about 3.3Mb/s.
But if I do an amflush of 6547621k it takes forever (about 12h).

What is wrong?

Here the relevant parts of the amanda.conf:
taperalgo smallest
dumporder "SSSSTTTTst"
tapedev "/dev/nst0"
tapetype HP-DAT
define tapetype HP-DAT {
    comment "DAT tape drives"
    length 11300 mbytes         # these numbers are not accurate
    filemark 512 bytes          # but you get the idea
    speed 4500 kbytes
}

How can I debug this strange thing?


Thanks and cheers
Nic'nearly no hair left due to this problem'ki

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