Re: [Bacula-users] Disadvantages to having multiple backups on the same tape // umount vs relase

[John D. <dre...@gm...>]

On Fri, Aug 1, 2008 at 9:36 AM, Keith Sudbury <ke...@ne...> wrote:
> John Drescher wrote:
>> On Fri, Aug 1, 2008 at 8:32 AM, Keith Sudbury <ke...@ne...> wrote:
>>
>>> Hi,
>>>
>>> I have an LTO-3 drive on my server and currently my backups re only
>>> about 100GB, and I could (and currently am fitting multiple backups on
>>> one tape). I am obviously changing the tape each day etc (its not the
>>> same tape) I have a different tape for mon - thursday and friday1
>>> friday2 etc
>>>
>>> But I am wondering if I should be using *Use Volume Once = Yes *which
>>> would then mark the tape FULL after it has used it once. If I don't do
>>> this I will eventually get to a day when only half a backup fits on the
>>> end?
>>> *
>>> *Or is it fine to leave more than one backup on a tape?
>>>
>>>
>> It is fine. I have had > 30 backups on a single LTO2 tape.
>>
>>
>>> I am ejecting my tapes with "umount LTO-3" is this ok? or should I be
>>> using "release LTO-3" and then doing umount?
>>>
>>>
>> Release is better because it does not remove the drive from bacula's
>> control so that if you reinsert the tape you will not need to mount
>> it. If you umount a tape bacula will not have control of the tape
>> drive until you issue a mount command inside of bacula.
>>
>>
> So a "mt eject" should work after I have done a   'release LTO-3' | bconsole
>
> And its fine to put in a different tape, so for example release mondays
> tape do a mt eject then put in tuesdays tape...
>
No need to eject. Release will eject the tape but the bacula will
automatically mount the next tape instead of requiring the user to
issue a mount in bacula. I hope I am not too confusing...

John