I agree with David.  I had to move a TSM server form VM to some other
platform.  Years ago, Tivoli dropped support for TSM on VM.  For years I
bugged Tivoli for support of channel attached tapes on Linux on System z. No
luck.  Finally, I migrated all of my data from TSM on VM to a TSM on Linux
running on Intel.  CPU usage for TSM is quite high and may not be a good
candidate for your IFLs unless you have lots to use or few clients.

Aria

-----Original Message-----
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of David
Boyes
Sent: Thursday, August 16, 2012 10:59 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: zLinux support of non-mainframe disk storage

> Does zLinux support non-IBM disk array storage?

If you mean FCP-connected disk, yes, with caveats. There are "officially
supported" vendors where the vendor has paid IBM to do testing and
certification. In general, most FCP-connected disk "just works", especially
if you put it behind a SAN switch that IBM does "officially" support. That
isolates the disk from the Z, and as long as the SAN switch is something IBM
has tested, it pretty much works fine.

> The background:
> We're currently running a Tivoli Storage Manager (TSM) server 5.5 on zOS,
> and have found out that TSM 5.5 is the last version on zOS. IBM does not
> plan to support TSM v6 on zOS.
> So we need to move our TSM server.  IBM has a migration path for TSM v5.5
> to TSM v6 onto either a system running AIX or zLinux.
> Since we run zLinux, we're going with the zLinux option.
> To decrease the storage cost and help with out disaster recovery, we are
> looking at moving the TSM storage pools to a non-zSeries storage medium.

They did tell you that you won't be able to use your current
channel-attached tape drives, right?
TSM on Linux doesn't support channel-attached tape.

The Linux TSM code is far less efficient than the z/OS (and z/VM) TSM code
was. Expect a fair increase in CPU usage.

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