Hi Heitor,
Definitely the same drive :)
https://www.backupworks.com/Quantum-superloader-3-LTO-8-16-Slot.aspx
<https://www.backupworks.com/Quantum-superloader-3-LTO-8-16-Slot.aspx> - you
can see the left and right magazines with the single drive slot in the center.
Here’s a link to the magazine on the right side
https://www.amazon.com/Quantum-Superloader-Eight-cartridge-Magazine-Include/dp/B000HWVLX6
<https://www.amazon.com/Quantum-Superloader-Eight-cartridge-Magazine-Include/dp/B000HWVLX6>
Really, the only reason for splitting the backups like this is so I can easily
take the entire magazine off-site once every 2 weeks or so. It’s far faster to
unload the magazine than it is to unload each tape individually.
If I can pretend that each magazine is a drive, perhaps the built-in one would
work ?
Cheers
Simon
> On Jan 4, 2021, at 1:04 PM, Heitor Faria <hei...@bacula.com.br> wrote:
>
> Hello Simon,
>
> I never heard of performing backups to alternate TL magazines and any benefit
> of that. Are you sure you are not talking about different tape drives?
> Anyway. The Bacula Enterprise Edition earlier versions already perform
> automatic tape drives round robin usage.
> I believe CBacula V. 11 *might* have this featured ported. You gotta check
> the code change log.
>
> Regards,
> --
> MSc Heitor Faria
> CEO Bacula LatAm
> mobile1: + 1 909 655-8971
> mobile2: + 55 61 98268-4220
>
> América Latina
> [ http://bacula.lat/]
>
>
>
> -------- Original Message --------
> From: Simon Gornall via Bacula-users <bacula-users@lists.sourceforge.net>
> Sent: Monday, January 4, 2021 03:49 PM
> To: bacula-users@lists.sourceforge.net
> Subject: [Bacula-users] Dual-pool backups
>
> So I’ve just ordered myself a Quantum Superloader-3 LTO-8 tape drive, and I’m
> planning on using it to back up the home network. Looking around, bacula
> seemed to fit to a ’T’, but I thought I’d ask if what I’m planning actually
> *does* fit well :)
>
> The SL3 has 2 magazines, of 8 tapes each. I think a full backup +
> incrementals every day will fit onto a single magazine (each is 96TB,
> uncompressed). The main source is the 112TB NAS, which is where the Macs (5
> of them) do their Time-Machine backups to, it holds all the movies and photos
> for the family etc. etc. We’re only using about 50TB of the NAS at the moment.
>
> The plan then, is to create two pools, each of 8 volumes, and to rotate
> backups between magazines, so it’ll do:
>
> Week 1: use Pool 1
>
> Sun: Full backup
> Mon..Sat: Incr backup // Maybe split this with a differential backup on Wed.
>
> Week 2: use Pool 2
>
> Sun: Full backup
> Mon..Sat: Incr backup // Maybe split this with a differential backup on Wed.
>
> + swap tapes in Pool 1 with offsite ones
>
> … and repeat, giving me a <current pool>, <previous-week pool> and <offsite
> pool> in a way that makes it easy to just pull a magazine at a time from the
> machine and replace it with another. Making backup-related jobs easy to do is
> the best way I’ve found of them actually happening …
>
>
> Looking at the docs, I think I can create a schedule with alternating weeks.
> I was wondering if there was a better way to do it than:
>
> Schedule {
> Name = “Monthly”
> Run = Level=Full Pool=LeftMagazine 1st|3rd|5th sun at 21:01
> Run = Level=Incremental Pool=LeftMagazine 1st mon-sat at 21:01
>
> Run = Level=Full Pool=RightMagazine 2nd|4th sun at 21:01
> Run = Level=Incremental Pool=RightMagazine 2nd mon-sat at 21:01
> }
>
> It also occurs to me that you could happen to get a backup on the 5th week
> which used the left magazine, and then switch to the first week of the next
> month, which would again use the left magazine. I think I could work around
> that using week-of-year maybe, but then it starts getting to be quite a long
> config line…
>
> Schedule {
> Name = “Monthly”
> Run = Level=Full Pool=LeftMagazine
> w01|w03|w05|w07|w09|w11|w13|w15|w17|w19|w21|w23|w25|w27|w29|w31|w33|w35|w37|w39|w41|w43|w45|w47|w49|w51
> sun at 21:01
> Run = Level=Incremental Pool=LeftMagazine
> w01|w03|w05|w07|w09|w11|w13|w15|w17|w19|w21|w23|w25|w27|w29|w31|w33|w35|w37|w39|w41|w43|w45|w47|w49|w51
> mon-sat at 21:01
>
> Run = Level=Full Pool=RightMagazine
> w02|w04|w07|w08|w10|w12|w14|w16|w18|w20|w22|w24|w26|w28|w30|w32|w34|w36|w38|w40|w42|w44|w46|w48|w50|w52
> sun at 21:01
> Run = Level=Incremental Pool=RightMagazine
> w02|w04|w07|w08|w10|w12|w14|w16|w18|w20|w22|w24|w26|w28|w30|w32|w34|w36|w38|w40|w42|w44|w46|w48|w50|w52
> mon-sat at 21:01
>
> }
>
> … but that’s a bit clumsy. Is there any better way to specify alternating
> weeks ?
>
>
> I haven’t actually got the machine yet, so I’m just thinking about how I want
> to set it up. Any advice much appreciated :)
>
> Cheers
> Simon
>
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