Re: [Bacula-users] sg device node stickyness

On Wednesday 22 October 2014 10:24:53 Robert Oschwald wrote:

> Using Bacula Server 7.0.4 on CentOS6_64.

> One thing which annoys me is that the sg device node for TapeAlert changes with every reboot from /dev/sg4 to /dev/sg6 and vice versa.

> Is there any setting I can set in udev to get sticky device nodes for my tape device changer device node?

> System has a LSI 3Ware 9650SE controller installed which is the one fighting for sg device node with my HP Ultrium 4 SCA tape device.

> Thanks,

> Robert

This is my autochg.sh script under gentoo stable

#!/bin/sh

sgdev=$(sg_map26 $1)

if [ -z "${sgdev}" ]; then

echo "TapeAlert: no sgdev for $1"

exit 0

The command "sg_map26" come from the sg3_utils

package that should be available under CentOS6

and make a good job for me converting the tape

device into the sg device.

Then, in the bacula-sd.conf stanza of your tape

or changer, you may use something like this

Alert Command = "sh -c '/etc/bacula/autochg.sh /dev/nlto0 | grep TapeAlert|cat'"

Seems to work correctly for me.

Hope it helps, G. Vitillaro

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