In fact, on AIX at least, I don't believe you _can_ define multiple
TSM paths to an Atape-based drive.  If you try, TSM gives an error.

I suspect that would be the case on other platforms and tape drivers,
as well.  The TSM concept of "path" isn't concerned with the physical
link topology used for connecting the tape drives.


Strand, Neil B. wrote:
>
> If you are using Atape on AIX only the primary path needs to be defined
> IF you have enabled alternate pathing.
> "chdev -l rmt5 -aalt_pathing=yes"
> See IBM "IBM Tape Device Drivers Installation and User's Guide"  PG 31,
> Pub GC27-2130-02
> It works like a champ on AIX.  Can't vouch for other platforms.
>
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf 
> Of
> Gee, Norman
> Sent: Thursday, February 07, 2008 12:43 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: [ADSM-L] Question on TSM environment sizes
>
>
> Does one need to define all the drive paths for multipath tape drives?
> Or does one only need to define one path and the OS will use the other
> paths as needed?
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf 
> Of
> Strand, Neil B.
> Sent: Wednesday, February 06, 2008 4:22 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: Question on TSM environment sizes
>
> 1900 drive path statements?
> 13 Libclients x 72 Drives = 936 paths + 72 for the lib mgr
>

--
Hello World.                                    David Bronder - Systems Admin
Segmentation Fault                                     ITS-SPA, Univ. of Iowa
Core dumped, disk trashed, quota filled, soda warm.   david-bronder AT uiowa 
DOT edu