ADSM-L

Re: [ADSM-L] UN-mixing LTO-4 and LTO-5

2012-06-12 02:21:35
Subject: Re: [ADSM-L] UN-mixing LTO-4 and LTO-5
From: Remco Post <r.post AT PLCS DOT NL>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 12 Jun 2012 08:15:29 +0200
check the format= option on your device class...

On 12 jun. 2012, at 08:02, Roger Deschner wrote:

> We have a tape library (Oracle/Sun/STK SL500) which contains both LTO-4
> and LTO-5 drives, and both LTO-4 and LTO-5 media. I am trying to keep
> TSM from mounting an LTO-4 cartridge in an LTO-5 drive, but it is
> insisting on doing it anyway.
>
> We have 4 LTO-4 drives and 3 LTO-5 drives. The mount limits for the two
> devclasses are set accordingly - to 4 for the LTO-4 devclass and 3 for
> the LTO-5 devclass. When a request to mount an LTO-4 cartridge comes, it
> seems to use any of the 7 drives, regardless of whether it is an LTO-4
> or LTO-5 drive. Therefore some tape mounts for LTO-5 cartridges are
> failing or being delayed due to there being no available LTO-5 drives
> when some of them are occupied by LTO-4 tapes. This is despite the claim
> in the section of the TSM Administrator's Guide for AIX servers titled
> "Mount limits in LTO mixed-media environments" (on book page 221 /
> physical page 249 in TSM V6.2 for AIX, or book page 198 / physical page
> 232 at V6.3) that setting the mountlimit to the actual number of
> earlier-generation drives will prevent the use of later-generation
> drives for the earlier-generation devclass.
>
> BTW, this is a library manager configuration, which may complicate
> things. The devclass definititions do match on the library manager and
> both of its library clients. The library manager is at 6.2.2.30, and its
> two clients are at 5.5.6.0 and 6.2.2.30.
>
> So, the question is, how do I prevent LTO-4 cartridges from being
> mounted in LTO-5 drives? I would prefer not to use the hardware library
> partitioning feature, which has its own set of hassles.
>
> Roger Deschner      University of Illinois at Chicago     rogerd AT uic DOT 
> edu
> ==== "NO OVERNIGHT CAMPING AUTOMATIC SPRINKLER SYSTEM IN OPERATION" ====
> ==== --sign, I-70 rest area, Parachute, Colorado =======================

--
Met vriendelijke groeten/Kind Regards,

Remco Post
r.post AT plcs DOT nl
+31 6 248 21 622