Re: Multiple tape libraries into a single fiber port?

Actually it works fine. A few things to consider (don't ask me how I know.)

1) If the same library has different types of sleds (e.g. LTO4 AND LTO5) they must be configured as TWO libraries one for each type of drive.

2) If more than one drive in the same library and you do NOT partition the library but still configure both drives as control path then do NOT connect them to the same partition at the same time, that is bad. Do not cross the streams.

3) Think about your zoning, carefully. It's pretty cool to be able to allow one machine access to one library a second to the other library and a third to both libraries at once. They simply appear as libraries under the Fiber IOA.

- Larry "DrFranken" Bolhuis

www.Frankeni.com


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On 12/22/2015 7:58 AM, rob@xxxxxxxxx wrote:

As i type this I'm thinking this is not possible but let me try.

Can you have multiple tape libraries into a single port? Gut says yes,
brain says no.

I have one tape library, with multiple drives, shared by multiple lpars of
IBM i, across two power 8's. VIOS lpar on one rack hosts it to all of
it's lpars of IBM i and has the physical fiber tape card. Similar
situation for the other rack.
Both connect to a SAN switch that supports all four drives.

Here's the catch, the fibers do not connect to the library, they connect
to each of the drives but they still show up as
WRKMLBSTS
Device/
Resource Status
TAPGRT01 ACTIVE
TAP01 OPERATIONAL
TAP02 OPERATIONAL
TAP04 OPERATIONAL
TAP03 ACTIVE

So, if I tried to control multiple libraries from one fiber port,
and you connect directly to the drives,
how would it know to put the drives on the other library on to a different
library?


Rob Berendt