William Enestvedt writes:
> I have a question about re-defining a drive in order to use two Storage
> Units with both of my Classes.
> Environment:
> - NBU 3.4.1GA on Solaris 2.6
> - Master server (E420R) with L9 (single Q8000 with slots for nine DLTs)
> and one media server (Ultra 10) also with L9 (single Q8000 with slots for
> nine DLTs)
> - 14 Sun clients.
> Currently, I have two Classes defined, with the clients spread between
> them. One Class backs up to the Master Server's tape library and the other
> Class backs up to the Media Server's tape library. I have a STU defined for
> each single-drive robot: I defined the drive in one as DLT and the drive in
> the other as DLT2. (I was hoping to keep from commingling tapes, but now I
> see that that was probably stupid: one Class always finishes quickly and the
> other sometimes exceeds its backup window.)
> I think I want to use both of my two storage units with all Classes
> (instead of sending one Class to one STU and one Class to the other), which
> would require that they take the same tapes (DLTs)....right? Or should I
> leave them as different densities and just let the sleeping dog lie?
No, you can use 'Any available' storage unit regardless of drive type.
I would want both of my units using the same drive type (that's more
robust should one unit go belly up right when you need to do a
restore). It's up to you whether it's worth the trouble to "fix" it
now.
> If I were to redefine my tape drive, I believe that I can define the
> drive in the DLT2 STU to use DLT tapes, and then I'll be fine _moving
> forward_ (as long as I change over my old DLT2 tapes to be DLT tapes). Will
> this change affect restoring from the DLT2 tapes until they expire? And is
> there anything else that I have to do with my tapes?
> Thanks for any suggestions and advice.
NBU won't put a DLT2 tape in a DLT drive, or vice versa. While there
are some combinations that are valid, the different types are there
specifically to say that these are DIFFERENT types.
You "can't" change the type of an assigned piece of media, so yes
there's some complications come restore time if you decide to change
the drive type.
> -wde
> P.S. Last week I took the Veritas class in NBU for Unix, and I discovered a
> number of things that I'd mis-read in the manual. *sigh*
> --
> Will Enestvedt
> UNIX System Administrator
> Johnson & Wales University -- Providence, RI
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--
Larry Kingery
"Time is the beauty of the road being long."
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