Re: [Bacula-users] exabyte autochanger

[Arno L. <al...@it...>]

Hi,

On 6/13/2007 8:58 PM, Maria McKinley wrote:
> Ralf Gross wrote:
>> Maria McKinley schrieb:
>>> Falk Sauer wrote:
>>>> please make shure that your changer device has the correct permissions eg.:
>>>>
>>>>  crw-rw---- root disk /dev/sg0
>>>>
>>>> and for the potentially next problem ...
>>>> by your tapedrive device i'm unshure, i think this should /dev/nst0, i don't 
>>>> know how its correct on exabyte tapes.
>>>>
>>>> Normally the /dev/st* device makes a automatic rewind after write, 
>>>> the /dev/nst* make no auto rewind. Bacula needs imho a non auto rewinding 
>>>> device. You dosn't write wich OS you use, here are little differences between 
>>>> the OSes.
>>> My permissions are:
>>>
>>> crw------- 1 root root     21,   0 2005-02-25 22:38 sg0
>>>
>>> so, maybe that is my problem. Can I just change this, like any file, 
>>> with chown (assuming that the disk part is important) and chmod?
>> udev might override the permissions again. I would create an udev rule
>> to set the right permissions (check if your system uses udev).
>>
>> You could try something like that:
>>
>> /etc/udev/rules.d/010-local.rules 
>>
>> KERNEL=="st*",                  GROUP="tape", MODE="0660"
>> KERNEL=="nst*",                 GROUP="tape", MODE="0660"
>>
>> /etc/init.d/udev restart (or reload...)
>>
>> The bacula user has to be member of group tape.
>>
>> Ralf
>>
> 
> Hmm, udev does not seem to be installed, although curiously, the config 
> files are there. On the machine I had working previously with this tape 
> drive and an earlier version of bacula (1.36), udev was also not 
> installed, but again the config files were there, so it seems some other 
> package is using and installing these config files.
...
> I'm still not entirely sure what to do about it. Since udev isn't 
> actually installed, I'm not sure what to restart to read my script.
> Seems like something should be reading the udev config files, since I 
> didn't put the default ones there, so some package must have. I'd rather 
> not reboot this machine, but I will if no one knows, and then I can see 
> if the permissions were updated. But how on earth did this get set in my 
> previous installation without a script in udev?

Which OS do you use?

Usually, there a commands available to tell you which package a file 
belongs to. For example, running an rpm-based distribution:
elf:~ # rpm -qf /etc/udev/udev.conf
udev-030-9.2

Starting with that information, or knowing which OS you run, someone 
might have an idea...


Oh, and of course you could always add a simple line like 'chown 
bacula.tape /dev/sg0' into the Bacula start script.

Arno

-- 
IT-Service Lehmann                    al...@it...
Arno Lehmann                  http://www.its-lehmann.de