Bacula-users

Re: [Bacula-users] Read-only device resources

2015-09-05 07:54:02
Subject: Re: [Bacula-users] Read-only device resources
From: Ana Emília M. Arruda <emiliaarruda AT gmail DOT com>
To: Josh Fisher <jfisher AT pvct DOT com>
Date: Sat, 5 Sep 2015 08:49:04 -0300
Hello Josh,

You're right, in the case of a virtual two-drive autochanger, if we configure the second drive (index 1) as read only, the drive index 0 (read/write) will be selected for reading and there will no available drive for writing since the second one is read only.

The way this could be solved is configuring the first drive as read only. This worked for me for a two-drive autochanger and virtual full backup.

I've not tested this with physical autochangers.

Best regards,
Ana

On Fri, Sep 4, 2015 at 5:02 PM, Josh Fisher <jfisher AT pvct DOT com> wrote:


On 9/4/2015 2:06 PM, Ana Emília M. Arruda wrote:
Hello Josh,

Are you using a physical or virtual autochanger?

I haven´t tried the read-only feature yet. But I was wondering if in the case of a physical autochanger you could have the read-only drive also configured as a standalone drive. This way it would be possible to configure your Virtual Full to use this standalone drive for reading and all the other ones for writing.

This is with a virtual autochanger. But how is does one specify the read drive separately from the write drive?


Best regards,
Ana

On Fri, Sep 4, 2015 at 11:56 AM, Josh Fisher <jfisher AT pvct DOT com> wrote:
Is anyone using the relatively new read-only feature of Device
resources? I had thought to use this feature to reserve an autochanger
drive as the read drive for virtual full backups. But in a two-drive
autochanger, making drive 1 read-only is problematic. A virtual full job
will select the read drive before it selects the write drive.  I have
confirmed that it will, or at least can, select drive 0 (the read/write
drive) as the read drive for the virtual full job and then be stuck
without a writable drive, causing the job to fail. I would have thought
that when selecting a read drive for a virtual full or copy job that the
selection would prefer an available read-only drive over an available
read/write drive, but that does not seem to be the case. Any thoughts?

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