> If someone puts a high-caliber bullet through my Gainesville DD, then
> I recover it from the replicated offsite DD, perhaps selecting a snapshot.
>
> If someone puts a high-caliber bullet through both of them, then I
> have lost my backups of a bunch of important databases.

And if you have a logical error on your primary box, which is then replicated 
to your 2nd box? Or even worse, a hash conflict?

I dont consider someone putting a bullet through both the boxes a high risk, I 
do however consider other errors to be more of a high risk.

Best Regards

Daniel





Daniel Sparrman
Exist i Stockholm AB
Växel: 08-754 98 00
Fax: 08-754 97 30
daniel.sparrman AT exist DOT se
http://www.existgruppen.se
Posthusgatan 1 761 30 NORRTÄLJE


-----"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> skrev: ----- 
Till: ADSM-L AT VM.MARIST DOT EDU
Från: "Allen S. Rout" 
Sänt av: "ADSM: Dist Stor Manager" 
Datum: 10/03/2011 23:38
Ärende: Re: [ADSM-L] Ang: Re: [ADSM-L] Ang: Re: [ADSM-L] Ang: Re: [ADSM-L] vtl 
versus file systems for pirmary pool

On 09/28/2011 02:16 AM, Daniel Sparrman wrote:

> In this mail, it really sounds like you're using your DD as both
> primary storage and for TSM storage.

I am, right now, using the DD as a target for direct-written database
backups, only.  So that's not really "primary storage", as I think
about it.


> If the DD box fails, what are your losses?

If someone puts a high-caliber bullet through my Gainesville DD, then
I recover it from the replicated offsite DD, perhaps selecting a snapshot.

If someone puts a high-caliber bullet through both of them, then I
have lost my backups of a bunch of important databases.



> Sorry for all the questions, I'm just trying to get an idea how
> you're using this box.

No problem. Our conversation is fuzzed by the fact that I am also
talking about how one _might_ use it for TSM storage.  I'm
contemplating it, but not doing it at the moment.

> [ ... if you lose a DD, then ... ] you have to restore the data from
> somewhere else (tape?).


In my planning, the DD gets copied / offsited to a remote DD, so
that's the somewhere else.

- Allen S. Rout