Steve,

Thanks for the reply.  These are all RedHat Linux V5 & 6.


Zoltan Forray
TSM Software & Hardware Administrator
Virginia Commonwealth University
UCC/Office of Technology Services
zforray AT vcu DOT edu - 804-828-4807
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From:   Steve Roder <spr AT BUFFALO DOT EDU>
To:     ADSM-L AT VM.MARIST DOT EDU
Date:   04/03/2012 12:06 PM
Subject:        Re: [ADSM-L] IBM 3592/TS1130-E06 fibre ports - can they be
split
Sent by:        "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>



You did not specify your OS, but yes, you should be able to do this.  In
AIX, the alternate pathing/load balancing is only used if you enable it
within Atape, either at the device level, or for all devices.  You should
be able to zone them up, discover them, and then update the paths, and
then drop the old devices into a defined state.  If you see issues, you
can always toggle back to the old device and path.

Thanks,

Steve Roder
University at Buffalo
(spr AT buffalo DOT edu | (716)645-3564)

On Tue, 3 Apr 2012, Zoltan Forray/AC/VCU wrote:

> We are in a major project to completely reorganize/replace our SAN
> switches used by tape drives for all TSM servers.
>
> We are hoping to transition to the new switches, gradually, vs all at
> once.  This depends on how the tape drives use the dual-ports/fibre
> connections.
>
> Currently, we only use 1 of the 2-ports on each drive...simply never had
> enough SAN switch ports to use both.
>
> What we were wondering is, could we connect the second, currently unused
> drive port to the new switches, 1-server at a time, and switch to using
> the new connection/port vs the existing port, via path values?
>
> Everything I read in the docs for the drives says it uses them for "load
> balancing and redundancy" but doesn't explicitly say if we could do what
> we would LIKE to do?
>
> Anyone try this kinda thing?  Any IBM engineer/hardware level folks out
> there who can tell me definitively that I simply can't do this - it
wasn't
> designed that way?
>
>
> Zoltan Forray
> TSM Software & Hardware Administrator
> Virginia Commonwealth University
> UCC/Office of Technology Services
> zforray AT vcu DOT edu - 804-828-4807
> Don't be a phishing victim - VCU and other reputable organizations will
> never use email to request that you reply with your password, social
> security number or confidential personal information. For more details
> visit http://infosecurity.vcu.edu/phishing.html