On Monday, 11/04/2019 at 07:24 GMT, Steven Imler 
<[email protected]> wrote:
> VM:Tape does have the VM:Tape Linux Interface (process that runs on the
> Linux guest) that can be used to mount and manage (channel attached) 
tapes
> for the Linux guest; as requested by the Linux backup agents, TPF, etc.

I'm not seeing that at the enterprise level, JR, only one-offs.  At scale, 
individual distributed systems don't write to tape.  They write to a 
server that uses (SCSI) tape as its own offload storage.  And it doesn't 
matter if the backup server runs on Z or not.  There are simply are not 
enough drives (virtual or real) to service thousands of backup streams 
from individual hosts.

OTOH, if you've got a "LAN-free" (SAN) device driver that simulates SCSI 
on FICON (like the inverse of a tape EDEVICE) such that a Spectrum Protect 
(or other) server running on Linux on Z can use it as tape, then it's 
worth calling that out.  It's through that interface that these backup 
servers read/write tapes and manipulate the library.

For my clients with Broadcom products, it would be good to know where to 
read about configuring (e.g.) Spectrum Protect client to use your VM:Tape 
Linux interface.

Alan Altmark

Senior Managing z/VM and Linux Consultant
IBM Systems Lab Services
IBM Z Delivery Practice
ibm.com/systems/services/labservices
office: 607.429.3323
mobile; 607.321.7556
[email protected]
IBM Endicott


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